Proactive pharmaceutical care and treatment outcome in psychiatric patients: A retrospective quasi-experimental study
Keywords:
Proactive pharmaceutical care, Drug related problems, Pharmacist, Psychiatric disorders, Treatment outcomeAbstract
This retrospective quasi-experimental study aims to evaluate the effectiveness of proactive pharmaceutical care by pharmacists and examine the characteristics of drug-related problems among psychiatric patients. The study included psychiatric patients who were followed up at the psychiatric clinic of Chiang Kham Hospital. The experimental group received proactive pharmaceutical care from October 1, 2022, to May 31, 2023. The historical control group received standard pharmaceutical care from October 1, 2021, to September 30, 2022. Proactive pharmaceutical care involved pharmacists identifying and resolving drug-related problems and monitoring adverse drug reactions. Treatment effectiveness was assessed 3 months post-consultation using the adapted clinical global impression-improvement (CGI-I) scale with four levels: 1. No improvement or death, 2. Partial improvement, 3. Improvement, and 4. Stable condition. Associations between pharmaceutical care and treatment outcomes were analyzed using ordered logistic regression, adjusted for gender, age, and psychiatric diagnosis, with results presented as common odds ratio (COR) with 95% confidence intervals (CIs). A total of 192 patients were included: 35 in the proactive pharmaceutical care group and 157 in the historical control group. Of these, 54.2% were male, with a mean age of 48.98 ± 15.83 years. Diagnoses included schizophrenia (55.7% of all participants), depression and anxiety (28.6% of all participants), and other psychiatric disorders (15.6% of all participants). Of 230 identified drug-related problems, the most common problems were lack of monitoring for adverse drug reactions (46.5% of all drug-related problems), occurrence of adverse drug reactions (16.5% of all drug-related problems), and patients not receiving prescribed medications (16.1% of all drug-related problems). Interestingly, the proactive care group showed better treatment outcomes, with an adjusted COR of 3.12 (95% CI: 1.41, 6.91). This association was more pronounced in females (adjusted COR: 3.60; 95% CI: 1.15, 11.28) than in males (adjusted COR: 3.09; 95% CI: 0.94, 10.17). Sensitivity analyses confirmed these findings. In conclusion, this study highlights that adverse drug reactions are significant drug-related problems in psychiatric patients. Proactive pharmaceutical care by pharmacists is associated with improved treatment outcomes in psychiatric outpatients. Further research in other hospital settings is recommended to confirm these findings, which could lead to enhanced quality of care for psychiatric patients.
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