Patients in these reports developed psychotic or manic features after chronic or acute phentermine use, mainly for weight reduction. The most recent article13 mentioned 4 patients who were abusing diet pills recreationally (including “for lethargy”). As with Ms. B, in all 4 of those patients, phentermine precipitated the primary pathology (mania in bipolar disorder; depression in postpartum depression and substance abuse) or revealed underlying illness.
Changing landscape of use and abuseThere has been a trend observed in the pattern of diet pill use: Initially marketed as an appetite suppressant, these pills are now being abused across ethnic, racial, and socioeconomic groups, by males and females.14 There is also a scarcity of useful guidance for clinicians.
Not only are diet pills used by people with an eating disorder; their recreational use is an emerging problem. If reports12,13 continue to reveal that phentermine is a substance of abuse and has catastrophic effects on the user’s psyche, the need for stronger warnings and guidelines might be warranted to allow consumers to make an informed choice about using the drug.
Call for awarenessThe case we presented here exemplifies the importance of tighter regulation of both over-the-counter and prescription stimulant analogs. There is a need for awareness among practitioners about early detection and treatment of reversible psychotic and mood symptoms secondary to what might be promoted as, or appear to be, “harmless” weight loss and energy pills.
Disclosures
The authors report no financial relationships with any company whose products are mentioned in this article or with manufacturers of competing products.
This unfunded study was presented as a case report poster at the Annual Meeting of the Academy of Psychosomatic Medicine, November 2013, Tucson, Arizona, and at the Colloquium of Scholars of the Philadelphia Psychiatric Society, March 2014, Philadelphia, Pennsylvania.
Drug Brand Names
Alprazolam • Xanax
Fenfluramine • Pondimin
Phentermine HCl • Adipex-P, Fen-Phen, Qsymia, Suprenza
Topiramate • Topamax, Trokendi XR
Zolpidem • Ambien
