Tacrolimus-Loaded Solid Lipid Nanoparticle Gel: Formulation Development and In Vitro Assessment for Topical Applications.

The currently available topical formulations of tacrolimus have minimal and variable absorption, elevated mean disposition half-life, and skin irritation effects resulting in patient noncompliance. In our study, we fabricated tacrolimus-loaded solid lipid nanoparticles (SLNs) that were converted into a gel for improved topical applications. The SLNs were prepared using a solvent evaporation method and characterized for their physicochemical properties. The particle size of the SLNs was in the range of 439 nm to 669 nm with a PDI of ≤0.4, indicating a monodispersed system. The Zeta potential of uncoated SLNs (F1-F5) ranged from -25.80 to -15.40 mV. Those values reverted to positive values for chitosan-decorated formulation (F6). The drug content and entrapment efficiency ranged between 0.86 ± 0.03 and 0.91 ± 0.03 mg/mL and 68.95 ± 0.03 and 83.68 ± 0.04%, respectively. The pH values of 5.45 to 5.53 depict their compatibility for skin application. The surface tension of the SLNs decreased with increasing surfactant concentration that could increase the adherence of the SLNs to the skin. The release of drug from gel formulations was significantly retarded in comparison to their corresponding SLN counterparts (p ≤ 0.05). Both SLNs and their corresponding gel achieved the same level of drug permeation, but the retention of the drug was significantly improved with the conversion of SLNs into their corresponding gel formulation (p ≤ 0.05) due to its higher bioadhesive properties.

Prescription analysis and cost of antidepressant drugs in major depressive disorder outpatients at the tertiary care hospital of Pakistan: a prospective approach.

OBJECTIVES: To assess prescribing care indicators, utilization pattern, cost per prescription, cost ratios, and percent cost variation of antidepressants (ADs). METHOD: A prospective cross-sectional study was carried out at the tertiary care hospital of Peshawar, Pakistan among major depressive disorder (MDD) outpatients from July 2019 to February 2020. The ideal standards for World Health Organization (WHO) prescribing care indicators were used. The ePharma Guide was used to calculate the cost in Pakistani rupees (Rs) and United States dollar (USD) 2021 (exchange rate: 1 USD = 154.43 Rs). RESULTS: A total of 296 MDD patients received 846 drugs (average 2.86; range:1-8), of which 366 were ADs (average number ADs/prescription; 1.23). About 23% (n = 68) of patients received more than one AD. Only 21 (5.7%) generic ADs were prescribed, and 346 (94.5%) ADs were prescribed from the hospital formulary list. Selective serotonin reuptake inhibitors (SSRIs) were the most prescribed ADs (67.5%). The average cost of ADs per prescription per month was 700.95 Rs (4.54 USD). Escitalopram (5.69 Rs; 0.04 USD) showed highest cost ratio and maximum percentage cost variation (468.97%). CONCLUSION: This study observed low generic prescribing, a higher prescribing trend of SSRI, wide differences in cost ratio and percentage cost variation among ADs.

Cost analysis of registered brands of oral antidepressant drugs in Pakistan: a descriptive analysis.

Background and objective: Depression is a global public health threat, and its treatment constitutes drugs in psychopharmacology, a domain that is rapidly growing with the addition of newer agents in market that are of high cost. Therefore, the present study aims to investigate the number of registered brands and price variation of oral antidepressants in Pakistan. Methods: A descriptive observational study was carried out to analyze the cost of oral antidepressants in Pakistan. Pharma guide 2019 was used to derive the cost of antidepressants marketed in Pakistan. The details about the number of registered brands and maximum and minimum prices of antidepressant drugs were calculated. Results: Sixteen drugs in 38 formulations were registered in 607 brands in Pakistan. Variations among 38 different formulations range from 0% to 746.39%. Out of these 38 formulations, 31 had variations below 200%, while 7 formulations had price variation above 200%. The highest price (746.39%) variation was observed for citalopram 20 mg (price per tablet PKR 6.79 to PKR 57.47) and no (0%) price variation was for bupropion 75 mg (price per tablet PKR 10). Conclusion: The study revealed wide variations in the number of registered brands and prices of oral tablets of antidepressants in Pakistan. The government needs to devise effective strategies to implement established policies to ensure uniformity in price, quality, and effectiveness with the ultimate goal to reduce treatment cost. Also, measures should be taken to inform prescribers about cost variation of drugs as prerequisite for cost-effective treatments to ultimately reduce treatment cost and financial burden and improve patient's adherence to therapy.