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| Clinical data | |
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| Trade names | Preludin, others |
| Routes of administration | By mouth, Intravenous, Vaporized, Insufflated, Suppository |
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| Pharmacokinetic data | |
| Elimination half-life | 8 hours |
| Excretion | Kidney |
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| CompTox Dashboard (EPA) | |
| ECHA InfoCard | 100.004.677 |
| Chemical and physical data | |
| Formula | C11H15NO |
| Molar mass | 177.247 g·mol−1 |
| 3D model (JSmol) | |
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Phenmetrazine (INN, USAN, BAN) (brand name Preludin, and many others) is a stimulant drug first synthesized in 1952 and originally used as an appetite suppressant, but withdrawn from the market in the 1980s due to widespread abuse. It was initially replaced by its analogue phendimetrazine (under the brand name Prelu-2) which functions as a prodrug to phenmetrazine, but now it is rarely prescribed, due to concerns of abuse and addiction. Chemically, phenmetrazine is a substituted amphetamine containing a morpholine ring.
- ^ Anvisa (31 March 2023). "RDC Nº 784 - Listas de Substâncias Entorpecentes, Psicotrópicas, Precursoras e Outras sob Controle Especial" [Collegiate Board Resolution No. 784 - Lists of Narcotic, Psychotropic, Precursor, and Other Substances under Special Control] (in Brazilian Portuguese). Diário Oficial da União (published 4 April 2023). Archived from the original on 3 August 2023. Retrieved 16 August 2023.