PMID- 37794661 OWN - NLM STAT- PubMed-not-MEDLINE LR - 20231031 IS - 1738-3684 (Print) IS - 1976-3026 (Electronic) IS - 1738-3684 (Linking) VI - 20 IP - 9 DP - 2023 Sep TI - The Use of Phentermine for Obesity in Psychiatric Patients With Antipsychotics. PG - 799-807 LID - 10.30773/pi.2023.0045 [doi] AB - OBJECTIVE: Phentermine is a commonly used weight-loss agent in the United States, but there is a little information about the use of phentermine for patients with obesity taking antipsychotic medications. METHODS: We gathered 57 patients with obesity taking antipsychotic medications whose phentermine treatment was simultaneous with or after any type of antipsychotic exposure and collected data of clinical information, initial/follow-up anthropometric variables, and adverse events (AEs) for the 6-month study period. RESULTS: In total, the mean body weight reduction (BWR) was 4.45 (7.04) kg, and the mean BWR percent (BWR%) was 3.92% (6.96%) at 6 months. Based on the response to phentermine, the patients were classified into two groups: the responder (n=25; BWR% >/=5%) and nonresponder (n=32; BWR% <5%) groups. The responder group's mean BWR and BWR% were 10.13 (4.43) kg and 9.35% (4.09%), respectively, at 6 months. The responders had higher rates of anticonvulsant combination therapy (ACT; responder, 72.0% vs. non-responder, 43.8%; p=0.033) and a shorter total antipsychotic exposure duration (responder, 23.9 [16.9] months vs. non-responder, 37.2 [27.6] months; p= 0.039). After adjusting age, sex, and initial body weight, ACT maintained a significant association with phentermine response (odds ratio=3.840; 95% confidence interval: 1.082-13.630; p=0.037). In the final cohort, there was no report of adverse or new-onset psychotic symptoms, and the common AEs were sleep disturbances, dry mouth, and dizziness. CONCLUSION: Overall, phentermine was effective and tolerable for patients with obesity taking antipsychotic medications, and ACT (predominantly topiramate) augmented the weight-loss effect of phentermine. FAU - Kim, Eunju AU - Kim E AD - Section of Endocrinology, Diabetes and Weight Management, Boston University, Boston University Chobanian & Avedisian School of Medicine, Boston, MA, USA. AD - Mood Disorder Clinic and Affective Neuroscience Laboratory, Department of Psychiatry, Seoul National University Bunding Hospital, Seongnam, Republic of Korea. FAU - Rim, Daniel AU - Rim D AD - Section of Endocrinology, Diabetes and Weight Management, Boston University, Boston University Chobanian & Avedisian School of Medicine, Boston, MA, USA. FAU - Shin, Jeong-Hun AU - Shin JH AD - Section of Endocrinology, Diabetes and Weight Management, Boston University, Boston University Chobanian & Avedisian School of Medicine, Boston, MA, USA. AD - Department of Internal Medicine, Hanyang University College of Medicine, Seoul, Republic of Korea. FAU - Wong, Denise AU - Wong D AD - Section of Endocrinology, Diabetes and Weight Management, Boston University, Boston University Chobanian & Avedisian School of Medicine, Boston, MA, USA. FAU - Kim, Dong Wook AU - Kim DW AD - Section of Endocrinology, Diabetes and Weight Management, Boston University, Boston University Chobanian & Avedisian School of Medicine, Boston, MA, USA. LA - eng PT - Journal Article DEP - 20230919 PL - Korea (South) TA - Psychiatry Investig JT - Psychiatry investigation JID - 101242994 PMC - PMC10555508 OTO - NOTNLM OT - Antipsychotics OT - Obesity OT - Phentermine OT - Safety OT - Topiramate COIS- Conflicts of Interest The authors have no potential conflicts of interest to disclose. EDAT- 2023/10/05 06:43 MHDA- 2023/10/05 06:44 PMCR- 2023/09/01 CRDT- 2023/10/05 01:35 PHST- 2023/02/10 00:00 [received] PHST- 2023/06/14 00:00 [accepted] PHST- 2023/10/05 06:44 [medline] PHST- 2023/10/05 06:43 [pubmed] PHST- 2023/10/05 01:35 [entrez] PHST- 2023/09/01 00:00 [pmc-release] AID - pi.2023.0045 [pii] AID - pi-2023-0045 [pii] AID - 10.30773/pi.2023.0045 [doi] PST - ppublish SO - Psychiatry Investig. 2023 Sep;20(9):799-807. doi: 10.30773/pi.2023.0045. Epub 2023 Sep 19.