Phentermine

Definition

A sympathomimetic appetite suppressant approved by the FDA in 1959 for short-term (≤12 weeks) weight management. The most widely prescribed weight-loss medication in the US historically. Single-agent dosing 8-37.5 mg daily. The phentermine half of Qsymia. Schedule IV controlled substance; cardiovascular contraindications apply.

Phentermine vs GLP-1 →

Definition curated by Weight Loss Rankings — sourced from FDA labels and peer-reviewed PubMed literature, never AI-generated summaries.

Related terms in drug

• Liraglutide
• Exenatide
• Dulaglutide
• Albiglutide
• Contrave
• Qsymia
• Bupropion
• Naltrexone
• Topiramate
• Pemvidutide
• Mazdutide

Looking for more depth?

• Phentermine vs GLP-1
• Browse the full GLP-1 glossary (124 terms across 8 categories)
• Research articles — primary-source deep dives
• Tools and calculators
• Compare GLP-1 telehealth providers