Synthroid vs Provera: side-by-side comparison
Synthroid (Hormones et contraception) and Provera (Santé sexuelle féminine) belong to different therapeutic classes and are rarely interchangeable. This page compares the medications' purposes, mechanisms and the situations where each is used.
| Property | Synthroid | Provera |
|---|---|---|
| Active ingredient | Levothyroxine | Medroxyprogesterone |
| Manufacturer | AbbVie | Pfizer |
| Class | Hormones et contraception | Santé sexuelle féminine |
| Strengths | 25mcg, 50mcg, 75mcg, 100mcg, 150mcg | 2.5mg, 5mg, 10mg |
| Forms | tablet | tablet |
What's the same
Synthroid and Provera 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
Synthroid belongs to Hormones et contraception while Provera belongs to Santé sexuelle féminine. 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
Synthroid: La lévothyroxine remplace la thyroxine endogène déficitaire, convertie dans les tissus en hormone active, la triiodothyronine (T3), par les enzymes désiodases. Provera: L'acétate de médroxyprogestérone se lie aux récepteurs de la progestérone et exerce de puissants effets progestatifs : épaississement de la glaire cervicale, inhibition de l'ovulation, amincissement de l'endomètre et réd…
When Synthroid is preferred
Synthroid est autorisé dans l'hypothyroïdie de toute cause (thyroïdite de Hashimoto, post-thyroïdectomie, post-iode radioactif, congénitale), dans le goitre et dans la freination de la TSH après cancer thyroïdien différencié.
When Provera is preferred
Provera est autorisé dans l'aménorrhée, les saignements utérins anormaux d'origine hormonale et la prévention de l'hyperplasie endométriale chez la femme ménopausée recevant un estrogène.
Questions fréquentes
Is Synthroid or Provera better? ▾
Synthroid and Provera 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 Synthroid to Provera? ▾
Switching between Synthroid and Provera 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 Synthroid and Provera 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 Synthroid comparisons
Les informations publiées sur ce site sont fournies à titre documentaire et pédagogique. Elles ne remplacent pas l'avis d'un professionnel de santé qualifié.