Synthroid vs Glucophage: side-by-side comparison
Synthroid (Hormones et contraception) and Glucophage (Traitement du diabète) 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 | Glucophage |
|---|---|---|
| Active ingredient | Levothyroxine | Metformin |
| Manufacturer | AbbVie | Merck Serono |
| Class | Hormones et contraception | Traitement du diabète |
| Strengths | 25mcg, 50mcg, 75mcg, 100mcg, 150mcg | 500mg, 850mg, 1000mg |
| Forms | tablet | tablet, extended-release tablet |
What's the same
Synthroid and Glucophage 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 Glucophage belongs to Traitement du diabète. 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. Glucophage: La metformine réduit la production hépatique de glucose en inhibant le complexe I mitochondrial, ce qui élève le rapport AMP/ATP cellulaire et active l'AMP-kinase.
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 Glucophage is preferred
Le médicament est indiqué en traitement oral de première intention chez l'adulte atteint de diabète de type 2, seul ou en association à d'autres antidiabétiques, dont l'insuline.
Questions fréquentes
Is Synthroid or Glucophage better? ▾
Synthroid and Glucophage 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 Glucophage? ▾
Switching between Synthroid and Glucophage 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 Glucophage 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.