Investigating the Prevalence of Contrast-associated Nephropathy and the Related Risk Factors in Patients Undergoing Elective Angioplasty.

Objective: Contrast-associated nephropathy (CAN) is a sudden decrease in kidney function following contrast media administration. Considering the importance of CAN in the patient's outcome and the high prevalence of this complication in cardiac catheterizing centers, this study was designed to investigate the prevalence and the related risk factors of CAN in patients undergoing angioplasty in Chamran Heart Hospital, Isfahan, Iran, from January 2022 to June 2022. Methods: The inclusion criteria were adult patients above 18 admitted for elective percutaneous coronary intervention (PCI). Patient demographic information, underlying diseases and medications, dehydration state, type and amount of contrast media, and serum levels of blood urea nitrogen (BUN) and serum creatinine (SrCr) at 24 and 72 h after contrast injection were all recorded. Findings: Out of 340, 128 patients developed CAN after PCI, giving an incidence of 37.64%. Adjusted analysis showed a significant relation between age over 65, the amount of contrast media administered, and the use of furosemide with the incidence of CAN. However, adjusted logistic regression analysis failed to show any significant relationship between the risk of CAN and the hydration status of the patients at 24 and 48 h after receiving contrast media as diagnosed by BUN/SrCr >20. Conclusion: The prevalence of CAN in this study was higher than in other studies since this high-risk population was under risk factors such as arterial injection of contrast material and a higher amount of contrast material administration. In addition, advanced age, volume of contrast material, and previous or concurrent furosemide administration were associated with an increased risk of CAN.

Development of a Web-Based Virtual Simulated Learning Environment for Pharmacy Practice Education.

Objective: In the present study, we aimed to develop a virtual simulation that allows pharmacy students to play through actual prescriptions and pharmacy practice scenarios productively and on a personal computer. If designed properly, this program may serve as a supplementary educational tool without the need for an existing human tutor that could provide learning outcomes as good as those resulting from traditional paper-based pharmacy practice tutorials. Methods: A computer-based simulation of a community pharmacy was developed. This program mainly targeted three basic learning needs of pharmacy students: drug dispensing, patient counseling, and dealing with clinical situations related to the patients' prescription or demand for over-the-counter (OTC) recommendations. Fundamental design decisions were based on breaking down the dispensing process into logical components to provide discrete development elements. For teaching patient counseling and clinical skills, instructors wrote scenarios covering the most prevalent pharmacy practice issues, mainly focused on medication use during pregnancy or lactation, OTC recommendations, information related to drug interactions and adverse drug reactions, and interactions between prescription drugs and patient's underlying disease. Findings: Based on the primary curriculum topics, the development team designed exercises for pharmacy practice units presented to year 5 pharmacy students. Accordingly, exercises were developed to authentically reflect tasks and challenges a community pharmacist would regularly face in the workplace. To fulfill this part, over 2000 real prescriptions were scanned and categorized based on the main drugs included. These prescriptions were used for both activities, namely medication dispensing and clinical scenarios. Furthermore, five senior pharmacy students wrote more than 200 clinical scenarios under a clinical pharmacist's supervision. The main objectives of pharmacy practice courses were followed to cover the most important must-to-know clinical tips, whether related to giving relevant advice as an OTC recommendation, referring the patient to a primary care physician, or just providing a piece of general health advice, which is expected to be comprehensively learned by pharmacy students. Conclusion: This program was designed as a simulated learning environment to help students develop prescription dispensing and clinical skills. To be considered a success, this simulation needed to provide equivalent or better learning outcomes than the current practice approach, which should be assessed in the future evaluation of the software, and then be promoted accordingly.

Effect of Selenium Supplementation on Lipid Profile, Anemia, and Inflammation Indices in Hemodialysis Patients.

Objective: Trace elements deficiency is common among end-stage renal disease (ESRD) patients due to excessive loss during dialysis and the lower intake secondary to loss of appetite. Selenium (Se) is a trace element that plays an important role in the radical scavenging system and helps the body defend against oxidative stress. This study aims to evaluate the effects of Se supplementation on lipid profile, anemia, and inflammation indices in ESRD patients. Methods: Fifty-nine hemodialysis patients enrolled and were randomly divided into two groups. Two hundred microgram Se capsules once daily for the case group and matching placebo for the control group were administered for three months. Demographic data were collected at the study beginning. Uric acid (UA), anemia and inflammation indices, and lipid profiles were recorded at the beginning and the end of the study. Findings: UA and UA-to-HDL (high-density lipoprotein) ratio decreased significantly in the case group (P < 0.001). The changes in lipid profile were not significant among both groups. Hemoglobin slightly increased in the case group, however, it decreased significantly in the control group (P = 0.031). High-sensitivity C-reactive protein (hs-CRP) decreased in the case group and increased in the control group, however, none of these changes were significant. Conclusion: According to the results of this study, selenium supplementation in ESRD patients could reduce some risk factors related to their mortality, such as the ratio of uric acid to HDL. However, the changes related to lipid profile, hemoglobin level and hs-CRP biomarker were not significant.

Effect of Omega-3 Fatty Acids Supplementation on Homocysteine Level in Patients Undergoing Continuous Ambulatory Peritoneal Dialysis.

Objective: One of the most common diseases with high morbidity and mortality rates is chronic kidney disease. Cardiovascular disease affects most patients with chronic kidney disorders, particularly patients undergoing dialysis; hence, appropriate prevention and management approaches are essential. This study aimed to evaluate the reduction of inflammatory biomarkers, especially homocysteine, by omega-3 fatty acids in peritoneal dialysis patients. Methods: This study enrolled 60 peritoneal dialysis patients who met specified inclusion and exclusion criteria and were randomized to intervention or placebo groups. Omega-3 capsules were given at a dose of 3 g/d for 8 weeks. Inflammatory markers, including high-sensitivity C-reactive protein (hs-CRP), homocysteine, albumin, and lipid profile measured before and after the study. Findings: Results of this trial revealed that the levels of homocysteine, hs-CRP, and albumin did not change significantly during the study. Analysis of lipid profiles before and after intervention showed omega-3 has no significant effect on the level of total cholesterol or low-density lipoprotein cholesterol; However, the level of triglyceride reduced remarkably (P = 0.002). In addition, serum levels of high-density lipoprotein cholesterol increased at the end of the study (P < 0.001). Conclusion: Omega-3 does not seem to be able to change the inflammatory markers significantly, particularly homocysteine. More extensive trials must be conducted to better understand the impact of omega-3 on inflammatory and nutritional markers, particularly in peritoneal dialysis patients.

Potential Benefits of Selenium Supplementation in Patients with Kidney Disease.

Trace element deficiency is common among patients with end-stage renal disease (ESRD); the reason is that since these patients undergo dialysis, they lose these elements more than healthy people, and also the use of trace elements is restricted due to loss of appetite. Selenium (Se) is a trace element that is essential for the oxidative stress defense system. Se deficiency leads to some complications similar to those often seen in ESRD patients, such as all-cause mortality due to cardiovascular diseases, bone loss, uric acid elevation, and anemia. This article aims to review the evidence on consequences of Se deficiency in ESRD patients, as well as effects of Se supplementation in hemodialysis patients. Multiple databases were searched to summarize the available evidence on selenium's role in kidney diseases. Since the complications of ESRD and those of Se deficiency are mostly similar, this triggers the idea that Se deficiency may be considered as a cause of these problems, but it needs to be more assessed that Se deficiency is a single factor or there are other factors participated in. Also the role of Se supplementation on resolving the mentioned complications, needs to be more studied through welldesigned clinical studies.

Homocysteine-Lowering Interventions in Chronic Kidney Disease.

The incidence of cardiovascular events and mortality is higher in patients with chronic kidney disease (CKD) compared to the general population. Homocysteine (Hcy) appears to be an independent risk factor for cardiovascular diseases in general populations and patients with CKD. Further, hyperhomocysteinemia can cause endothelial damage and increase the activity and production of coagulation factors, and its prevalence among patients with end-stage renal disease is approximately 85%-100%. Most treatments, which lower Hcy levels and have been considered in previous studies, include folic acid, B vitamins, omega-3 fatty acids, and N-acetylcysteine. However, the effect of therapies that can decrease Hcy levels and thus cardiovascular events in these patients is still unclear. The results are conflicting and require further investigation. To guide treatment decisions and improve patient outcomes, multiple databases were searched, including Web of Science, PubMed, and Medline to summarize the available evidence (i.e., clinical trial and meta-analyses) on Hcy-lowering interventions and cardiovascular events.

Herbal Supplement Use and Herb-drug Interactions among Patients with Kidney Disease.

OBJECTIVE: The prevalence of herb-drug interactions and herb's adverse effects may be serious in susceptible population such as patients with chronic kidney disease (CKD). In this study, we planned to determine the usage prevalence of herbal products and herb-drug interactions in CKD patients. METHODS: A cross-sectional prospective study was conducted on CKD and posttransplant patients with a history of using herbal supplements in Isfahan, Iran. The patients were subjected to a validated checklist, containing demographic and clinical information. The knowledge of herbal use, side effects, and herb-drug interactions was assessed based on patients' responses. Data were reported as prevalence (percent) of the occurrence. FINDINGS: The prevalence of herbal supplement usage among CKD patients was 18.6% in this study. The study included 400 patients (261 males and 139 females). The majority of the study population were in the age range of 50-70 years (61.5%). Hypertension (34.36%) was the most common cause of kidney failure, while diabetes mellitus (21.80%) took the second place. The most frequently used unformulated medicinal herb was Echium (Echium amoenum) (15.27%), and the most commonly used formulated herbal products were anticough and mucolytic based on Thymus vulgaris (24.27%). Eighteen patients (4.5%) used herbal mix with unknown entity and sources. In this study, ginseng has the most possible interactions with prescription drugs (18 interactions), while this interaction (with clopidogrel, warfarin, and heparin) was severe in six cases. CONCLUSION: The present study provided the information on possible herb-drug interactions in CKD patients on herbal usage. Since the issue of using herbal products may be arbitrarily in the majority of the patients, and considering the importance of adverse reactions or major interactions, health-care providers should play an active role to identify these cases and inform the patients regarding herbal product safety, adverse effects, and possible interactions.

Potential of Drug Interactions as a Cause of Adverse Drug Reactions in Patients with Kidney Diseases.

OBJECTIVE: Adverse drug reactions (ADRs) are one of the major causes of mortality. One of the major causes of ADR is drug-drug interactions. The purpose of this study was to evaluate the prevalence and characteristics of ADRs caused by the drug interactions in the nephrology departments. METHODS: This cross-sectional prospective study was carried out in the nephrology department on 117 patients who received at least two medicines. Drug interactions were determined, and the patients were evaluated for the presence of a drug complication. FINDINGS: A total of fifty ADRs were observed in 39 patients, whereas 26% of total ADRs (13 drug complications) were due to drug interactions. About 69% and 31% of complications were classified in terms of severity, in the category of "severe" and "moderate" complications, respectively. Warfarin had the highest contribution to major interactions (33.33%). CONCLUSION: ADRs, which specially occurred due to drug interactions, are particularly important for patients taking multiple medications (e.g., patient with renal insufficiency). Therefore, special attention should be paid to preventing and reducing ADRs in these patients' population.

Effect of N-acetylcysteine against Vancomycin-Induced Nephrotoxicity: A Randomized Controlled Clinical Trial.

BACKGROUND: The proposed mechanism of vancomycin-induced nephrotoxicity (VIN) is indirect production of reactive oxygen species in the kidney tissue. This study aimed to investigate the effectiveness of N-acetylcysteine (NAC), an anti-oxidant agent, in the prevention of VIN. METHODS: Patients who received vancomycin for any indication were randomly divided to drug (NAC) and control groups. The patients in the drug group received oral NAC 600 mg every 12 hours for 10 days, starting concurrently with vancomycin. Serum creatinine (SCr) levels and blood urea nitrogen (BUN) as well as creatinine clearance (CrCl) and 12-hour urine volume were recorded at baseline, every other day during the study, and 12 hours after the last dose of vancomycin on the 10th day. Furthermore, the cases of acute kidney injury (AKI; ≥ 0.5 mg/dL or at least 50% increase in serum creatinine from baseline) were recorded in the two groups. RESULTS: Over the study period, 84 and 95 patients completed the study in drug and control groups, respectively. SCr and CrCl were significantly lower and higher, respectively, at all-time points (except for baseline) in the NAC compared to the control group. Furthermore, although not statistically significant, 12 cases of vancomycin-induced AKI were observed in the control group (12.63%), while 4 cases (4.76%) were reported from drug group (P = 0.066; relative risk [RR] = 0.377, 95% CI: 0.126-1.124). CONCLUSION: NAC has the potential for reduction of VIN. However, more studies are necessary to confirm this effect.

Vitamin E in the prevention of vancomycin-induced nephrotoxicity.

BACKGROUND AND PURPOSE: The use of vancomycin, as a key therapeutic choice for treatment of hazardous infections, may be associated with nephrotoxicity. The proposed mechanism is the indirect production of reactive oxygen species and oxidative stress. The purpose of this study was to investigate the effect of vitamin E as an antioxidant agent in the prevention of vancomycin-induced nephrotoxicity. EXPERIMENTAL APPROACH: In a matched-groups interventional study, patients who received vancomycin for any indication were assigned to vitamin E (n = 30) and control (n = 60) groups. The patients in experimental group received 400 units of oral vitamin E per day for 10 days started concurrently with vancomycin, while the patients in control group received vancomycin alone. Serum level of creatinine, blood urea nitrogen (BUN), creatinine clearance (CrCl), and 24-h urine output were determined and recorded before the start of interventions, every other day during therapy, and 12 h after the last dose of vancomycin in 10th day of therapy for all patients. Also, the rate of acute kidney injury (AKI) in the two groups was recorded. Finally, the mean values of the measured parameters were compared between the groups. FINDINGS / RESULTS: Treatment with vitamin E for 10 days resulted in a significant reduction of BUN (from 17.5 ± 7.8 mg/dL at baseline to 11.4 ± 4.8 mg/dL at the end; P < 0.001) along with slightly non-significant increase of CrCl (from 84.7 ± 18.9 mL/min at baseline to 91.3 ± 19.5 mL/min at the end; P = 0.301) in comparison to the control group. However, CrCl decreased significantly in the control group. Vitamin E had no significant effect on 24-h urine output. Regarding vancomycin-induced AKI, 12 cases were observed in the control group, while no case was reported in experimental group (P = 0.041). CONCLUSION AND IMPLICATIONS: This study showed the beneficial effect of add-on therapy of vitamin E besides vancomycin in reducing AKI, which could be considered as a new potential prophylactic therapy for vancomycin-induced nephrotoxicity.

Pentoxifylline in Prevention of Amphotericin B-induced Nephrotoxicity and Electrolyte Abnormalities.

OBJECTIVE: Amphotericin B is an antifungal agent used to treat serious fungal infections mainly in critically ill patients. Despite its adverse effects including renal toxicity and electrolyte imbalances, amphotericin B remains one of the best choices for antifungal treatment. Information from animal studies has provided a strong scientific basis for the use of pentoxifylline as lowering nephroprotective agent. The present study was designed to evaluate the efficacy of pentoxifylline in preventing renal toxicity and electrolytes imbalances induced by amphotericin B. METHODS: This study was conducted as a randomized controlled trial on 44 patients admitted to Sayyedoshohada Hospital, Isfahan, Iran, from October 2016 to August 2018. Patients were assigned to one of the two groups: Pentoxifylline, 400 mg twice a day, or matching placebo, from the 1st day of amphotericin B therapy till minimum of 7 days. All patients' information including lab data (serum and urine levels of Mg, Na, and K, serum creatinine level, blood urea nitrogen [BUN] and urinary creatinine excretion) were gathered at the time of drug initiation and during the study period. The results were analyzed by SPSS v. 20 software and Repeated measures test was used to assess the differences between groups. FINDINGS: This study did not show any significant differences between the two groups in terms of all the assessed variables, including serum and urinary levels of electrolytes, and creatinine, as well as the number of cases presented acute kidney injury during the study period. CONCLUSION: Despite the positive effects of pentoxifylline in preventing renal complications in previous studies, this study could not show a definitive result in salt wasting or renal damage induced by amphotericin B. So, Designing robust studies with more included samples would be valuable.

Therapeutic drug monitoring of vancomycin by AUCτ-MIC ratio in patients with chronic kidney disease.

In this study which was conducted in Alzahra University Hospital (Isfahan, I.R. Iran), the therapeutic drug monitoring of vancomycin focused on determining area under the concentration-time curve at dosing interval (τ) at steady state/minimum inhibitory concentration (AUCτ/MIC) was carried out in chronic kidney disease (CKD) patients. The study population was selected from patients with the history of CKD (stages 3 or 4) treated by intravenous vancomycin. To determine vancomycin AUCτ, blood samples were taken at four different occasions (trough-1, peak, random, trough-2) between the fourth and fifth doses of vancomycin. Drug concentration was determined by fluorescence polarization technique, and the E-TEST technique was used to determine the MIC. Nineteen patients were included. For 8 (42%), 7 (37%), and 4 (21%) patients, trough concentration levels were found to be less than 10 mg/L, 10-20 mg/L, and more than 20 mg/L, respectively. The mean value of AUCτ for studied patients was 470.7 ± 228.3 mg.h/L and the mean MIC values was 1.04 ± 0.43 mg/L. Ten patients (53%) and 9 patients (47%) had the AUCτ/MIC ratios above 400 and below 400, respectively, with the average of 519.4 ± 391.3 h. Vancomycin dosing based on patient glomerular filtration rate (GFR), as a traditional method, is not accurate enough to gain the most desired vancomycin concentration in patients with decreased or changing kidney function. Measuring drug concentration and observing its therapeutic effects accordingly is inevitable in susceptible populations receiving vital drugs such as vancomycin.

Optimal Use of Ganciclovir and Valganciclovir in Transplanted Patients: How Does It Relate to the Outcome?

OBJECTIVE: Organ transplant recipients receive immunosuppressive regimens to prevent transplant rejection, which put them at increased risk for opportunistic infections like cytomegalovirus (CMV). Ganciclovir and Valganciclovir are mostly used to prevent or treat CMV. Any incorrect use of the drug may have serious consequences for patients. In this study, the outcome of transplant recipients was assessed in relation to the optimal or suboptimal use of Ganciclovir or Valganciclovir. METHODS: This study was performed on 148 hospitalized patients who received Ganciclovir or Valganciclovir in the nephrology and kidney transplantation departments of our university hospitals, from March 2012 to December 2016. Patients' demographic and clinical data including dose and duration of treatment were collected and then analyzed in comparison with the standard CMV treatment protocols. FINDINGS: About 94.6% of patients received Ganciclovir or Valganciclovir therapy consistent with the standard defined indications. The mean ratio of prescribed daily dose to the optimal dose was 2.9 in the first dose, 2.0 in the second dose, 1.3 in the third dose, and 1.5 in the fourth dose. From 148 included patients, 26.5% experienced CMV infection once, 7.2% experienced CMV infection twice, and 1.2% had CMV infection for 3 times, within six-month follow-up after first episode of antiviral therapy during hospitalization. CONCLUSION: In this study, empiric anti-CMV therapy was initially given. The doses used were generally higher than recommended but we could not find more adverse events in the patients receiving high initial doses. In any case, it seems necessary to advocate use of standard treatment guidelines to avoid adverse outcomes.

Effects of Carnitine on Nutritional Parameters in Patients with Chronic Kidney Disease: An Updated Systematic Review and Meta-Analysis.

Protein energy malnutrition is a common problem in patients with chronic kidney disease (CKD). Scattered reports indicate that supplementation of Carnitine may improve patients' clinical symptoms, with significant improvement in nutritional parameters. This systematic review was done to document the evidences of Carnitine effects in nutritional status of CKD patients. Peer-reviewed RCTs on Carnitine administration at any dose in CKD patients with at least four weeks of follow-up were including in the meta-analysis. Online databases (PubMed/Medline, ISI Web of Science, Embase, and Scopus) were searched to October 2017 using selected MeSH terms related to the study topic. Data was extracted independently by two reviewers using a standard form and then cross-checked. Statistical analyses were carried out with Comprehensive Meta-analysis software. Data are presented as standard mean difference (SMD) and 95% confidence interval (CI). According to the predefined criteria, a total of 14 randomized controlled clinical trials were included and screened for data extraction by two reviewers, separately. The preliminary results extracted from meta-analysis have shown that Carnitine can significantly increase the levels of albumin (SMD: -0.861; 95% CI: -1.321, -0.402), total protein (SMD: -0.418; 95% CI: -0.695, -0.141), total cholesterol (SMD: -0.350; 95% CI: -0.564, -0.135), LDL cholesterol (SMD: -0.362; 95% CI: -0.551, -0.173), transferrin (SMD: -1.465; 95% CI: -1.822, -1.108), and hemoglobin (SMD: -0.525; 95% CI: -0.732, -0.318); however there were no conclusive effects of Carnitine on body weight (SMD: -0.057; 95% CI: -0.404, 0.291) and BMI (SMD: -0.567; 95% CI: -1.548, 0.415), in pooled analyses. The results of this meta-analysis showed that there are considerable useful pieces of evidence so far about the effect of Carnitine on nutritional factors; however, there is still doubt about some evidences with this regard. It seems necessary to carry out clinical trials with stronger designs to evaluate the impact of these primary outcomes on the patients' clinical conditions. Having this evidences, the potential role of Carnitine in improving malnutrition consequences in CKD patients would be clearly defined.

Growth Hormone Utilization Review in a Pediatric Primary Care Setting.

OBJECTIVE: One of the main problems facing public health providers and administrators in many countries is ensuring the rational use of high-cost drugs. In this regard, on-going process of medication use evaluation can be considered as a useful tool. In this study, we evaluated certain usage aspects of a highly-cost medication, that is, recombinant growth hormone (GH). METHODS: This cross-sectional study conducted from August 2012 to August 2014. Children receiving GH ± gonadotropin releasing hormone (GnRH) analogs were included in the study. A researcher-designed checklist was developed to evaluate the GH utilization in these patients. Baseline demographic characteristics and background clinical and growth data, as well as any aspects of drug therapy including indications, dosing, monitoring, and discontinuation were collected from the patients' medical records. FINDINGS: Seventy children receiving GH entered the study, of which 23 patients (32.85%) received GH and GnRH analogs simultaneously. At the baseline, 67 children (95.7%) had GH stimulation test, whereas serum insulin-like growth factor-1 (IGF-1) levels were measured in 63 (90%) patients. Sixty-seven patients (95.71%) had thyroid function test, whereas bone age was determined in 68 children (97.14%). The mean ± standard deviation of GH dose for idiopathic short stature, GH deficiency, Turner's syndrome and born small for gestational age in our study was 0.22 ± 0.025 mg/kg/week, 0.23 ± 0.04 mg/kg/week, 0.22 ± 0.015 mg/kg/week, and 0.23 ± 0.02 mg/kg/week, respectively. Height and weight of all patients were followed every 3-6 months, regularly. Thirty patients were treated with GH for at least 1 year, of which thyroid hormones and IGF-1 levels were measured annually in 25 (83.33%) and 26 (86.66%) patients, respectively; while bone age was evaluated in 13 (43.33%) children, annually. GH treatment was discontinued in 15 patients (21.42%), while financial problem was the major reason. CONCLUSION: Diagnostic tests and monitoring of height, weight, IGF-1 level and thyroid function was properly performed in this setting. However, a number of patients with ISS and Turner's syndrome were under-dosed.

Ganciclovir use evaluation in kidney transplantation departments.

OBJECTIVE: In this study, we evaluated certain aspects of the usage and administration of one lifesaving, high-cost medication, i.e., Ganciclovir for the prevention and treatment of cytomegalovirus (CMV) infection in transplant patients. METHODS: This study was performed from 2013 to 2015 by conducting a medication use evaluation (MUE) program in the kidney transplantation departments of two tertiary care hospitals in Isfahan, Iran. The MUE criteria for the drug were developed by applying drug information references. In every category of data, the number (percent) of cases, in which drug therapy was in accordance with the predetermined criteria, was calculated. FINDINGS: During the study period, 67 cases were observed. The only documented drug interaction was the minor interaction of Ganciclovir with mycophenolate mofetil in 77% of the patients. In all patients, intravenous (IV) infusion was the route of administration, mainly in the peripheral veins. Four patients showed adverse drug reaction, which leads to Ganciclovir discontinuation. Ganciclovir was administered despite contraindication in 34.3% of the patients. CONCLUSION: In this study, we faced a relatively unacceptable situation, in which Ganciclovir is handled somehow inappropriately. It seems necessary to develop an updated local guideline to approximate the administering pattern of such costly medications to standard protocols.

Effect of intravenous midazolam on cardiac parameters in acute tricyclic antidepressants poisoning.

BACKGROUND: Midazolam is commonly and safely used in poisoning management and intensive care for the control of agitated poisoned patients. Despite the introduction of newer and safer antidepressants, tricyclic antidepressants (TCAs) are still prescribed and used in many countries due to their cost-effectiveness. Severe morbidity and mortality associated with these drugs arises largely from their well-documented cardiovascular toxicity. In this study we aimed to investigate the probable effect of midazolam on some hemodynamic indices in TCAs-poisoned patients. METHODS: In this clinical trial, we have evaluated some cardiovascular and hemodynamic indices of 100 TCAs-poisoned patients whom were randomly allocated for receiving midazolam with a first loading dose of 0.1 mg/kg (2 mg/minute) followed by a 6-hour maintenance infusion of 0.1 mg/kg/h of the drug in dextrose-saline (3.33% of dextrose and 0.33% of NaCl) or placebo (dextrose-saline infusion without midazolam). Pulse rate, systolic/diastolic blood pressure, respiratory rate, neurologic status and the outcome of therapy for all patients were recorded at the time of admission and hourly for the next 6 hours. RESULTS: There was a statistically significant reduction in the heart rate of the midazolam treated group after the first hour of hospital admission. There were no significant differences in the respiratory rate, central nervous system manifestations and other indices between the two groups. CONCLUSION: Midazolam may reduce tachycardia (and its fatal consequences) in the first hour of admission in TCAs-poisoned patients.

Clinical effects of Portulaca oleracea seeds on dyslipidemia in obese adolescents: a triple-blinded randomized controlled trial.

OBJECTIVE: Childhood obesity is a major public health concern worldwide while the current epidemic may be secondary to over consumption of high-fat, energy-rich foods. Purslane (Portulaca oleracea L.) has been traditionally used in medicine for several antioxidant and anti-atherogenic activities. In this study the anti-dyslipidemic effects of Poleracea was evaluated in obese adolescents. METHODS: In this triple-blinded randomized placebo-controlled clinical trial which was done from July 2011 to June 2012, obese adolescent patients whom were referred to the Isfahan Cardiovascular Research Institute (Iran) were randomly allocated to the two arms of cases and controls. The cases group was asked to take one capsule containing powdered P. oleracea seeds (500 milligrams) two times a day for one month, and the controls group were asked to take identical but placebo (lactose) capsules in the same way. Biochemical parameters including 12-hours fasting serum levels of total cholesterol, low-density lipoprotein cholesterol (LDL-C), high-density lipoprotein cholesterol (HDL-C), and triglycerides (TG) were measured before the initiation and after the completion of the study protocol. FINDINGS: Total cholesterol, LDL-C, and TG showed statistically significant changes over time (one month) in the P. oleracea group (p < 0.05). However, between-group analysis using general linear model (multivariate) test revealed that the differences in the mentioned parameters between two study groups were statistically significant just for LDL-C and TG, while others did not differ significantly. CONCLUSION: P. oleracea L. may have positive effects on serum lipids profile which may be attributed to its polyphenolic and antioxidant compounds. This herbal drug seems to be well-tolerated in adolescent population as well. Further studies are recommended.

Bacterial safety of commercial and handmade enteral feeds in an Iranian teaching hospital.

BACKGROUND: This study aimed to investigate and compare the bacterial safety of handmade and commercial ready-to-use enteral feeding formulas used in an Iranian teaching hospital. METHODS: In this experimental study, a total number of 70 samples (21 handmade formulas sampled at two sampling times, i.e. the time of preparation and 18 h after preparation, and 28 commercial ready-to-use formulas) were studied. Total count of viable microorganisms, coliform count and Staphylococcus aureus count for all samples were conducted. RESULTS: Out of 42 handmade samples, 16 samples (76%) had total viable counts greater than 10(3) CFU/g in the first sampling time and 17 samples (81%) had total viable counts greater than 10(3) CFU/g in the second sampling time. Also, 11 (52%) had coliform contamination in the first sampling time which reached 76% (16 samples) in the second sampling time. Regarding contamination with S. aureus, 5 samples (24%) were contaminated in the first- and 13 samples (62%) were contaminated in the second-sampling time. Out of 28 commercial formulas, 27 samples (96%) had total viable counts greater than 10(3) CFU/g. Also, 24 samples (86%) were contaminated with S. aureus and 27 samples (96%) were contaminated with coliforms. In order to compare these two formulas, the results of Mann-Whitney test showed that contamination of ready-to-use formulas in all three microbiological samples was significantly more than that for handmade samples. CONCLUSIONS: The results of the present study indicate that the microbial safety of enteral feeding solutions in this hospital is much lower than standard values, demonstrating that the development of protocols for clean techniques in the preparation, handling and storage of both commercial and handmade enteral feeds is necessary.

Clinical pharmacokinetics of tacrolimus in Iranian liver transplant recipients.

Tacrolimus, a cornerstone of immunosuppressive therapy in solid organ transplantation, has a narrow therapeutic range with considerable inter-individual and intra-individual pharmacokinetic variability. To date, there is no information on the pharmacokinetics of tacrolimus in Iranian liver transplant recipients. This study was designed to determine pharmacokinetic properties of orally administered tacrolimus in Iranian adult liver transplant recipients. Tacrolimus doses and steady state whole blood trough concentrations as well as patient demographic and clinical data were obtained retrospectively using the 30 included patients' medical records. Pharmacokinetic parameters were estimated by using a nonlinear mixed effect model program (Monolix version 3.1). Absorption rate constant was fixed at two hours(-1). Drug apparent clearance (CL/F), apparent volume of distribution (Vd/F), and elimination half life (t½ß) were calculated. The administered dose of tacrolimus to the patients ranged from 0.02 to 0.14 mg/Kg/day. Tacrolimus blood trough concentrations varied widely within the range of 1.8 to 30 ng/mL. The mean values of CL/F, Vd/F, and t½ß were found to be 9.3 ± 0.96 L/h, 101 ± 29 L, and 7.5 hours, respectively. The pharmacokinetics of tacrolimus was highly variable among our patients. CL/F, Vd/F, and t½ß of tacrolimus in this study were comparable to reported values from Italian heart transplant patients but somewhat different from reported ones from other solid organ transplant populations.