The thyroid hormone drug levothyroxine requires specific conditions for absorption because it reacts strongly to variations in absorption. The consumption of magnesium with this medication, reduces the body’s ability to properly absorb it. The thyroid function medication becomes less effective due to magnesium interference, which leads to inadequate thyroid symptom control. Medical professionals state that patients should take levothyroxine as their first medication in the morning on an empty stomach, while waiting at least four hours to consume magnesium supplements or any antacids containing magnesium. The correct timing of these medications will ensure they function as intended.
Sources
Medications you should avoid taking with magnesium – 1mg
5 Medications You Shouldn’t Mix with Magnesium – EatingWell
Magnesium Oxide: MedlinePlus Drug Information
Magnesium – Uses, side effects, and more – WebMD
8 Magnesium Interactions You Should Know About – GoodRx
Disclaimer: This article is informational only and not a substitute for medical advice