FDA pharmacologic class
MAO inhibitors
5 medicines are in FDA's class of monoamine oxidase inhibitors (MAO inhibitors): rasagiline (Azilect), selegiline (Emsam), tranylcypromine (Parnate), phenelzine (Nardil) and isocarboxazid (Marplan). 4 of the 5 are listed from generic labelers (FDA NDC Directory, October 8, 2026). The lowest pharmacy cost is rasagiline mesylate 0.5 mg tablet at $0.521 per tablet (NADAC).
Which medicines are mao inhibitors?
| Medicine | Brand names | Generic labelers (all forms) | Pharmacy cost | Boxed warning | Shortage | Recalls since 2012 |
|---|---|---|---|---|---|---|
| Rasagiline | Azilect | 14 labelers | $0.521 per tablet 0.5 mg tablet | No | No current entry | 3 |
| Selegiline | Emsam, Zelapar | 11 labelers | $0.756 per capsule 5 mg capsule | No | No current entry | 1 |
| Tranylcypromine | Parnate | 4 labelers | $0.591 per tablet 10 mg tablet | Yes | A presentation being discontinued | 0 |
| Phenelzine | Nardil | 1 labeler | $0.586 per tablet 15 mg tablet | Yes | No current entry | 0 |
| Isocarboxazid | Marplan | none listed | n/a | Yes | In shortage | 0 |
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