Propecia vs Wegovy: side-by-side comparison
Propecia (Male and Female Pattern Hair Loss) and Wegovy (Diabetes Treatment) belong to different therapeutic classes and are rarely interchangeable. This page compares the medications' purposes, mechanisms and the situations where each is used.
| Property | Propecia | Wegovy |
|---|---|---|
| Active ingredient | Finasteride | Semaglutide |
| Manufacturer | Merck | Novo Nordisk |
| Class | Male and Female Pattern Hair Loss | Diabetes Treatment |
| Strengths | 1mg | 0.25mg, 0.5mg, 1mg, 1.7mg, 2.4mg |
| Forms | tablet | pre-filled pen |
What's the same
Propecia and Wegovy are used in very different patients, and the points in common are limited. The main shared element is that both meet regulatory standards for efficacy and safety and benefit from pharmacist oversight.
Key differences
Propecia belongs to Male and Female Pattern Hair Loss while Wegovy belongs to Diabetes Treatment. Indications, mechanisms and target populations differ. The comparison is most useful when a clinician has mentioned both medications and the patient wants to understand where each fits.
Mechanism and action
Propecia: DHT, produced from testosterone by 5-alpha-reductase, drives miniaturisation of scalp hair follicles in genetically susceptible men, gradually shortening anagen growth phases until follicles produce only fine vellus hair… Wegovy: Wegovy acts on the GLP-1 receptor in the central nervous system and gastrointestinal tract to reduce appetite, slow gastric emptying and increase satiety.
When Propecia is preferred
Propecia is approved for the treatment of male pattern hair loss (androgenetic alopecia) in men aged 18 to 41.
When Wegovy is preferred
Wegovy is indicated as an adjunct to a reduced-calorie diet and increased physical activity for chronic weight management in adults with obesity (BMI 30 or higher) or with overweight (BMI 27 or higher) and at least one weight-related comorbidity such as hypertension, dyslipidaemi…
Frequently asked questions
Is Propecia or Wegovy better? ▾
Propecia and Wegovy are not interchangeable — they treat different conditions. Asking which is "better" is meaningful only when a clinician has weighed both for the same specific clinical scenario.
Can I switch from Propecia to Wegovy? ▾
Switching between Propecia and Wegovy is rarely an appropriate decision since they belong to different classes and treat different conditions. The real question is usually whether the diagnosis calls for one medication or the other — which the prescriber resolves.
Do Propecia and Wegovy have the same side effects? ▾
No — they belong to different classes and have distinct side-effect profiles. Each medication has its own prescribing information.
More Propecia comparisons
The information on this website is provided for reference and educational purposes only. It does not replace consultation with a qualified healthcare professional.