TSH
3 interactions related to TSH
levothyroxine + magnesium
Taking magnesium too close to levothyroxine can modestly reduce how much of the thyroid medicine is absorbed, because magnesium can bind levothyroxine in the gut.
levothyroxinemagnesiumabsorptionabsorption interactiondrug supplement interactionsupplement timingmedication timingTSHthyroid medicationantacids
levothyroxine + iron
When taken at the same time, iron can reduce how much levothyroxine your body absorbs by forming a poorly soluble complex in the gut, which can blunt the effect of your thyroid medication and raise TSH.
levothyroxineironabsorptionabsorption interactionsupplement timingmedication timingthyroid medicationhypothyroidismTSHferrous sulfate
levothyroxine + calcium
Calcium can reduce levothyroxine absorption when the two are taken close together
levothyroxinecalciumabsorptionabsorption interactionsupplement timingthyroid medicationhypothyroidismTSHantacidscalcium supplements