HealthRX.com · Printable supplement log
Magnesium alongside Ozempic: product, bowel-symptom and blood-test record
Record the exact magnesium product and dose you take, how your stomach and bowels behave around each weekly Ozempic dose, and any serum magnesium results, so your clinician or pharmacist can judge whether the supplement is needed and suits you.
The product in your cupboard
Copy these from the Supplement Facts panel, not the front of the bottle.
Brand and magnesium formoxide, citrate, glycinate, chloride, other
Elemental magnesium per serving (mg)
Servings a day, and the times you take them
Date you started
Other products with magnesiumantacids, laxatives, multivitamins
Medicines this page names as lowering magnesium (tick any you take)
- Omeprazole, pantoprazole, esomeprazole or another proton pump inhibitor
- Hydrochlorothiazide or another thiazide diuretic
- Furosemide or another loop diuretic
- Metformin (the page calls the evidence mixed)
Day by day around your Ozempic dose
| Date | Ozempic dose this week | Magnesium taken (mg, time) | Nausea or vomiting | Stools (loose, normal, hard) | Cramps or twitching |
|---|---|---|---|---|---|
Blood tests
| Date | Serum magnesium and unit | Lab's reference range | eGFR or creatinine | Comment |
|---|---|---|---|---|
Figures from the sources behind this page
- SUSTAIN 1 (30 weeks): nausea in 20% on semaglutide 0.5 mg, 24% on 1.0 mg and 8% on placebo; diarrhoea in 13%, 11% and 2%.[1]
- A review reports hypomagnesemia in 13.5 to 47.7% of people with type 2 diabetes.[2]
- In a study of US commercial magnesium preparations in healthy volunteers, magnesium oxide had a fractional absorption of about 4%; magnesium chloride, lactate and aspartate were absorbed better.[3]
- Adult RDA: men 400 mg/day (19 to 30) and 420 mg/day (31 and older); women 310 mg/day (19 to 30) and 320 mg/day (31 and older).[4]
- MedlinePlus: side effects from high magnesium intake are not common, except with significantly reduced kidney function; it does not currently advise magnesium supplements for preventing or managing high blood pressure, heart disease or diabetes.[4]
To ask your clinician or pharmacist
- Do I need a serum magnesium test, and when should it be repeated?
- Does my kidney function change whether magnesium is safe for me, or how much?
- Could this form of magnesium be making my loose stools worse?
- If I take Rybelsus or Ozempic tablets, when should my magnesium go relative to the tablet?
- Should any of my other medicines, such as levothyroxine or a bisphosphonate, be taken apart from magnesium?
Sources for the facts on this sheet
- Sorli C, Harashima SI, Tsoukas GM, et al. Efficacy and safety of once-weekly semaglutide monotherapy versus placebo in patients with type 2 diabetes (SUSTAIN 1): a double-blind, randomised, placebo-controlled, parallel-group, multinational, multicentre phase 3a trial. Lancet Diabetes Endocrinol 2017. PMID 28110911. https://pubmed.ncbi.nlm.nih.gov/28110911/
- Pham PC, Pham PM, Pham SV, et al. Hypomagnesemia in patients with type 2 diabetes. Clin J Am Soc Nephrol 2007. PMID 17699436. https://pubmed.ncbi.nlm.nih.gov/17699436/
- Firoz M, Graber M. Bioavailability of US commercial magnesium preparations. Magnes Res 2001. PMID 11794633. https://pubmed.ncbi.nlm.nih.gov/11794633/
- U.S. National Library of Medicine, MedlinePlus. Magnesium in diet: MedlinePlus Medical Encyclopedia. Accessed 2026-10-19. https://medlineplus.gov/ency/article/002423.htm
This sheet records information for a conversation with your prescriber or pharmacist. It does not replace their instructions or the medication's prescribing information.