Long Term Exposure to Tenofovir Disoproxil Fumarate-Containing Antiretroviral Therapy Is Associated with Renal Impairment in an African Cohort of HIV-Infected Adults.

OBJECTIVES AND METHOD: There are growing concerns of tenofovir disoproxil fumarate (TDF)-associated renal toxicity. We evaluated the effect of long-term TDF exposure on renal function in a cohort of HIV-1-infected Nigerians between 2006 and 2015. Multivariate logistic regression was used to identify predictors of renal impairment at different time over 144 weeks of antiretroviral therapy (ART). RESULTS: Data of 4897 patients, median age 42 years (interquartile range: 36-49), and 61% females were analyzed. The prevalence of renal impairment increased from 10% at week 24 to 45% at 144 weeks in TDF-exposed participants compared to an increase from 8% at 24 weeks to 14% at 144 weeks in TDF-unexposed participants. Tenofovir disoproxil fumarate exposure predicted the risk of renal impairment at 144 weeks of ART (odds ratio: 2.36; 95% confidence interval: 1.28-4.34). CONCLUSION: Long-term exposure to TDF-based ART significantly increases the likelihood of renal impairment. The continued use of TDF-based regimen in our setting should be reviewed. We recommend the urgent introduction of tenofovir alafenamide-based regimen in the HIV treatment guidelines of Nigeria and other resource-limited countries.

Pattern of drug therapy problems and interventions in ambulatory patients receiving antiretroviral therapy in Nigeria.

OBJECTIVES: We describe the frequency and types of drug therapy problems (DTPs), and interventions carried out to resolve them, among a cohort of HIV-infected patients on ART in Jos, Nigeria. METHODS: A prospective pharmacists' intervention study was conducted between January and August 2012 at the outpatient HIV clinic of the Jos University Teaching Hospital (JUTH). Pharmacists identified DTPs and made recommendations to resolve them. The main outcome measures were number of DTPs encountered, interventions proposed and acceptance rate of recommendations. RESULTS: A total of 42,416 prescriptions were dispensed to 9339 patients during the eight months study. A total of 420 interventions (Intervention rate of 1 per 100 prescriptions) were made to resolve DTPs in 401 (4.3%) patients with a mean age of 41 (SD=10) years, and made up of 73% females. DTPs encountered were drug omission (n=89, 21.2%), unnecessary drug (n=55, 13.1%) and wrong drug indication (n=55, 13.1%). Recommendations offered included; Addition of another drug to the therapy (n=87, 20.7%), rectification of incomplete prescriptions (n=85, 20.2%), change of drug or dosage (n=67, 16.0%), and discontinuation of the offending drug (n=59, 14.0%). A total of 389 (93%) out of 420 of the recommendations were accepted. In all, 50.4% (212) of the problematic prescriptions were changed and dispensed, 22.2% (89) were clarified and dispensed, while wrong identities were corrected in 11.7% (49). However, 7.5% (30) prescriptions were dispensed as prescribed, 5.2% (21) were not dispensed, and 3% (12) were unresolved. CONCLUSION: Our findings suggest that pharmacists-initiated interventions can ameliorate DTPs in patients receiving ART given the high intervention acceptance rate recorded. The implication of this finding is that pharmacists with requisite training in HIV pharmacotherapy are an excellent resource in detecting and minimizing the effect of antiretroviral drug-related errors.

Patterns and Predictors of First-Line Antiretroviral Therapy Modification in HIV-1-Infected Adults in a Large Urban Outpatient Cohort in Nigeria.

OBJECTIVE: We described the magnitude, type, and factors associated with first-line antiretroviral therapy (ART) modification in HIV-1-infected adults on ART in Jos, Nigeria. METHOD: Data on 6309 patients initiated on first-line ART between January 2004 and December 2006 were analyzed retrospectively. Factors predictive of modification to initial ART were assessed by chi-square and multivariable logistic regression analysis. RESULTS: Overall, 5212 (83%) included patients incurred a modification (73.3% drug substitution and 9.7% drug switch) to their initial first-line ARV regimen during a median (interquartile range) follow-up period of 7 (3-8) years. Drug substitutions of zidovudine (ZDV) were less likely than of tenofovir (TDF; adjusted odd ratio [AOR] 0.6; 95% confidence interval [CI]: 0.51-0.71), and Drug substitutions of efavirenz (EFV) were more likely than of nevirapine (NVP)-containing (AOR 1.82; 95% CI: 1.42-2.33) regimens. Predictors of switch to second-line regimen include older age (AOR 2.05; 95% CI: 1.68-2.51), CD4 count≤100 cells/mm3 (AOR 1.89; 95% CI: 1.49-2.37), EFV compared to NVP (AOR 1.38; 95% CI: 1.02-1.88), and drug toxicity (AOR 1.90; 95% CI: 1.48-2.43). CONCLUSION: Modification to initial ART was common in this study. Further evaluation of the contribution of guideline changes on regimen modification and treatment outcomes is recommended.

Pharmaceutical care outcomes in an outpatient human immunodeficiency virus treatment center in Jos, Nigeria.

RATIONALE: Pharmacotherapy for patients infected with human immunodeficiency virus (HIV) is complex and increases the potential for drug therapy problems (DTPs). We described the frequency and type of DTPs in a Nigerian cohort of HIV infected patients on antiretroviral therapy (ART), as well as the changes in HIV clinical outcomes after pharmacists' intervention. METHODS: A prospective 1-year descriptive study was conducted from July 2010 to June 2011, at the adult HIV clinic of Jos University Teaching Hospital, Nigeria. DTPs and the associated pharmacist-initiated interventions were documented. Chi-square and Wilcoxon signed ranks test was used as appropriate, to compare the main outcome measures of pre- and post-intervention levels of viral load and CD+ cell count. RESULTS: A total of 64,839 prescriptions were dispensed to 9320 patients. Interventions were documented for 85 unique patients (incidence of 1.31 interventions/1000 prescriptions), of which 62 (73%) and 3 (3.5%) were on first- and second-line ART, respectively, while 20 (23.5%) were yet to commence ART. Reasons for pharmacist intervention included failure to initiate therapy for HIV or hepatitis B infection; therapeutic failure (25.9%); and drug toxicity (24.7%). After intervention, the percentage of patients with HIV ribonucleic acid level <400 copies/mL rose from 29.4% to 67.1% (P < 0.001), while median (interquartile range) CD4+ cell count increased from 200 (123-351) to 361 (221-470) cells/mm(3) (P < 0.001). CONCLUSION: Pharmacist intervention resulted in clinically significant improvements in patients HIV virological and immunological outcomes. This highlights an important role for the pharmacist in the treatment and care of HIV-infected patients, in a multidisciplinary team.

Pharmaceutical care and medication adherence in management of psychosis in a Nigerian tertiary hospital.

OBJECTIVE: The primary objective of this study is to examine the medication adherence levels (as a function of pharmaceutical care) and its contributing factors in schizophrenic patients receiving antipsychotic drugs. METHODS: This was a cross-sectional study administering a structured questionnaire to 231 patients. Adherence was measured through patient self-reporting. Association between independent variables and adherence to antipsychotics were measured through odds ratios (OR) in the univariate analysis while the best predictors of adherence were determined through the multiple logistic regressions. FINDINGS: Adherence level was found to be 65.8% (95% confidence interval [CI]: 59.3-71.9%). The following factors were identified to be associated with adherence in the univariate analysis: age (OR 1.088), sex (OR 1.231), employment (OR 0.366), marital status (singles, OR 0.022), drug adherence counseling (OR 11.641), twice a day frequency (OR 8.434), alcohol non-intake (OR 1.469), educational level (primary OR 1.9312, secondary OR 11.022, tertiary OR 4.771), occupation (public servant 6.273). In the multivariate analysis, age, three times a day frequency of drug intake, singles and educational levels such as primary, secondary or tertiary school, strongly affected adherence (P < 0.05). CONCLUSION: Although patients adherence level was high (65.8%), there is a need to emphasize that pharmacists spend more time in counseling and educating patients, especially younger ones on drug adherence before any antipsychotic medications are dispensed. Furthermore, patients should be taught the use of adherence devices such as reminders so that adherence to antipsychotic medications can be optimized.

Patient factors impacting antiretroviral drug adherence in a Nigerian tertiary hospital.

OBJECTIVE: To study the adherence levels and explore factors impacting them in out-patients on antiretroviral therapy (ART) at the AIDS Prevention Initiative in Nigeria antiretroviral clinic of the Jos University Teaching Hospital. MATERIALS AND METHODS: We administered a structured questionnaire to 461 patients presenting to the clinic. Adherence was measured using the patient self-report. The association between independent variables and adherence to ART was measured through odd ratios (OR) in the univariate analysis. The best predictors of adherence were determined through multiple logistic regression models with backward elimination. RESULTS: The adherence level was found to be 87.9%. The following factors were found to have strong impact on adherence in the univariate analysis: age (OR 1.04), sex (OR 1.14), employment (OR 1.29), knowledge of HIV (OR 1.11), thrice daily frequency of drug intake (OR 1.68), twice daily frequency (OR 2.18), alcohol nonintake (OR 0.29), knowledge of ARVs (OR 1.23), pill burden (OR 1.20), and HIV status disclosure (OR 1.08). In the multivariate analysis, only age, alcohol nonintake and twice daily, frequency of drug intake affected adherence (P < 0.05). CONCLUSIONS: To increase adherence and the effectiveness of ART, there is need to continuously emphasize the use of adherence devices and reminders. Counseling and adherence education should also be emphasized especially for younger patients and those with low educational levels.

Predictors of impaired renal function among HIV infected patients commencing highly active antiretroviral therapy in Jos, Nigeria.

BACKGROUND: Kidney disease is a common complication of human immunodeficiency virus (HIV) infection even in the era of antiretroviral therapy, with kidney function being abnormal in up to 30% of HIV-infected patients. We determined the predictors of impaired renal function in HIV-infected adults initiating highly active antiretroviral therapy (HAART) in Nigeria. MATERIALS AND METHODS: This was a retrospective study among HIV-1 infected patients attending the antiretroviral clinic at the Jos University Teaching Hospital (JUTH), between November 2005 and November 2007. Data were analysed for age, gender, weight, WHO clinical stage, CD4 count, HIV-1 RNA viral load, HBsAg and anti-HCV antibody status. Estimated glomerular filtration rate (eGFR) was calculated using the Cockcroft-Gault equation. Statistical analysis was done using Epi Info 3.5.1. RESULTS: Data for 491 (294 females and 197 males) eligible patients were abstracted. The mean age of this population was 38.8±8.87 years. One hundred and seventeen patients (23.8%; 95% CI, 20.2-27.9%) had a reduced eGFR (defined as <60 mL/min), with more females than males (28.6% vs. 16.8%; P=0.02) having reduced eGFR. Age and female sex were found to have significant associations with reduced eGFR. Adjusted odds ratios were 1.07 (95% CI, 1.04, 1.10) and 1.96 (95% CI, 1.23, 3.12) for age and female sex, respectively. CONCLUSIONS: Older age and female sex are independently associated with a higher likelihood of having lower eGFRs at initiation of HAART among our study population. We recommend assessment of renal function of HIV-infected patients prior to initiation of HAART to guide the choice and dosing of antiretroviral drugs.