FDA pharmacologic class
Sympathomimetic Amine Anorectic
4 medicines are in FDA's class of sympathomimetic amine anorectics: phentermine (Lomaira), diethylpropion, phendimetrazine and benzphetamine; 1 combination product also contains one. All 5 are listed from generic labelers (FDA NDC Directory, October 8, 2026). The lowest pharmacy cost is phentermine 37.5 mg tablet at $0.0727 per tablet (NADAC).
Which medicines are sympathomimetic amine anorectic?
| Medicine | Brand names | Generic labelers (all forms) | Pharmacy cost | Boxed warning | Shortage | Recalls since 2012 |
|---|---|---|---|---|---|---|
| Phentermine | Lomaira | 25 labelers | $0.0727 per tablet 37.5 mg tablet | No | No current entry | 9 |
| Diethylpropion | none listed | 13 labelers | $0.238 per tablet 25 mg tablet | No | No current entry | 2 |
| Phendimetrazine | none listed | 11 labelers | $0.132 per tablet 35 mg tablet | No | No current entry | 0 |
| Phentermine and topiramate | Qsymia | 2 labelers | $3.06 per capsule 7.5-46 mg capsule | No | No current entry | 0 |
| Benzphetamine | none listed | 6 labelers | n/a | No | No current entry | 2 |
Source: FDA Established Pharmacologic Class (NDC Directory, openFDA); CMS NADAC of October 7, 2026; FDA shortages and recalls (FDA files October 8, 2026)
What do pharmacies pay?
Each medicine's most widely listed form, per unit, in the NADAC survey: what pharmacies paid, not what a patient pays; strengths differ, so compare like with like.
Source: CMS National Average Drug Acquisition Cost (NADAC) survey, October 7, 2026: what retail pharmacies paid per unit; not a counter price