Interaction reference

GLP-1 receptor agonists with Magnesium

Magnesium supplements are frequently recommended to manage GLP-1-related constipation and muscle cramps. There is no harmful interaction; the combination is generally complementary.

Magnesium is commonly used to ease GLP-1 constipation and cramps — no dangerous interaction, just space it from other oral meds.

Also known as: magnesium glycinate, magnesium citrate, mag oxide

Per-GLP-1 breakdown

Wegovysemaglutide 2.4 mg
No documented interaction
Mechanism: Magnesium does not affect GLP-1 pharmacokinetics. It can bind some oral medications (notably certain antibiotics and levothyroxine) and reduce their absorption, but does not bind injectable GLP-1s.
What to do: Magnesium glycinate or citrate in the evening can relieve GLP-1-induced constipation. Separate magnesium from levothyroxine and tetracycline/fluoroquinolone antibiotics by at least 4 hours. Excess magnesium causes diarrhea, which can compound GLP-1 GI effects — start low.
Zepboundtirzepatide
No documented interaction
Mechanism: Magnesium does not affect GLP-1 pharmacokinetics. It can bind some oral medications (notably certain antibiotics and levothyroxine) and reduce their absorption, but does not bind injectable GLP-1s.
What to do: Magnesium glycinate or citrate in the evening can relieve GLP-1-induced constipation. Separate magnesium from levothyroxine and tetracycline/fluoroquinolone antibiotics by at least 4 hours. Excess magnesium causes diarrhea, which can compound GLP-1 GI effects — start low.
Ozempicsemaglutide
No documented interaction
Mechanism: Magnesium does not affect GLP-1 pharmacokinetics. It can bind some oral medications (notably certain antibiotics and levothyroxine) and reduce their absorption, but does not bind injectable GLP-1s.
What to do: Magnesium glycinate or citrate in the evening can relieve GLP-1-induced constipation. Separate magnesium from levothyroxine and tetracycline/fluoroquinolone antibiotics by at least 4 hours. Excess magnesium causes diarrhea, which can compound GLP-1 GI effects — start low.
Mounjarotirzepatide
No documented interaction
Mechanism: Magnesium does not affect GLP-1 pharmacokinetics. It can bind some oral medications (notably certain antibiotics and levothyroxine) and reduce their absorption, but does not bind injectable GLP-1s.
What to do: Magnesium glycinate or citrate in the evening can relieve GLP-1-induced constipation. Separate magnesium from levothyroxine and tetracycline/fluoroquinolone antibiotics by at least 4 hours. Excess magnesium causes diarrhea, which can compound GLP-1 GI effects — start low.
Foundayoorforglipron
No documented interaction
Mechanism: Magnesium does not affect GLP-1 pharmacokinetics. It can bind some oral medications (notably certain antibiotics and levothyroxine) and reduce their absorption, but does not bind injectable GLP-1s.
What to do: Magnesium glycinate or citrate in the evening can relieve GLP-1-induced constipation. Separate magnesium from levothyroxine and tetracycline/fluoroquinolone antibiotics by at least 4 hours. Excess magnesium causes diarrhea, which can compound GLP-1 GI effects — start low.

Sources

Magnesium — fact sheet for health professionals (opens in a new tab) — NIH Office of Dietary Supplements

See other interactions

Full interaction index