Aygestin vs Levothyroxine: brand vs ingredient
Aygestin contains Norethindrone, while Levothyroxine is a different active ingredient in the Thyroid hormone replacement class. This page compares them: when each is used, how the mechanisms and indications differ, and whether the question "Aygestin vs Levothyroxine" makes sense to ask at all.
What is the relationship?
Aygestin and Levothyroxine are different things: Aygestin is a branded medication whose active ingredient is Norethindrone (in the Santé sexuelle féminine class), whereas Levothyroxine is in the Thyroid hormone replacement class. They belong to different therapeutic classes and are chosen for different indications.
When Aygestin is used
Aygestin est autorisé dans les douleurs associées à l'endométriose, les saignements utérins anormaux d'origine hormonale et l'aménorrhée secondaire.
When Levothyroxine is used
La lévothyroxine est autorisée 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.
Mechanisms compared
Aygestin: La noréthistérone se lie aux récepteurs de la progestérone et exerce des effets progestatifs : épaississement de la glaire cervicale, suppression du pic de LH, amincissement de l'endomètre et réduction de l'activité des… Levothyroxine: La lévothyroxine remplace la thyroxine endogène déficitaire, convertie dans les tissus en hormone active, la triiodothyronine (T3), par les enzymes désiodases.
When the comparison makes sense
Comparing Aygestin with Levothyroxine makes sense when both are in the same clinical decision: the prescriber has weighed both for different but related conditions. If the question is between two options for the same need, the prescriber decides based on prior response, comorbidities and tolerance.
Questions fréquentes
Do Aygestin and Levothyroxine treat the same thing? ▾
No — they treat different conditions because they belong to different therapeutic classes. The question of which to use is for the prescriber to answer based on the specific indication.
Can Aygestin and Levothyroxine be combined? ▾
It depends on the interaction profile of Norethindrone with Levothyroxine. If both are in a single prescription, the prescriber has weighed it. Self-medicating with both is not recommended without pharmacist review.
Which is better, Aygestin or Levothyroxine? ▾
"Better" doesn't apply between medications for different indications. The sensible question is which fits your specific clinical need — that is the prescriber's call.
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.