Can I Take 5-HTP with Metformin?
5-HTP and metformin have no established direct drug interaction, but serotonin-related side effects and GI overlap deserve attention. Here is what the evidence says about combining them safely.
Supplements Metformin
29 source-based articles maintained by the HealthRX.com Editorial Team.
29articles
3topic areas covered
May 27, 2026latest review
Supplements Metformin library
Showing 29 of 29 clinical reviews.
Can I Take Alpha-Lipoic Acid With Metformin?
A guide to the metformin and alpha-lipoic acid combination: interaction mechanisms, hypoglycemia risk, dosing, timing, and what monitoring your doctor should order.
Can I Take Ashwagandha with Metformin?
A guide to the ashwagandha-metformin interaction, covering pharmacodynamics, cortisol, thyroid effects, blood-sugar overlap, dosing timing, and monitoring recommendations.
Can I Take Berberine with Metformin?
Berberine and metformin both lower blood sugar through overlapping mechanisms. Learn about their pharmacokinetic and pharmacodynamic interactions, safety data, dose-separation strategies, and monitoring requirements.
Can I Take Caffeine with Metformin?
A guide to the metformin and caffeine interaction, covering pharmacokinetics, blood glucose effects, blood pressure, dosing timing, and monitoring guidance.
Can I Take Calcium with Metformin?
A guide to the metformin and calcium interaction: pharmacokinetics, timing, B12 implications, dosing, and safety monitoring for people with type 2 diabetes or prediabetes.
Can I Take CoQ10 with Metformin?
A guide to taking CoQ10 with metformin: what the evidence says about safety, any pharmacokinetic or pharmacodynamic interactions, dosing guidance, and what to monitor.
Can I Take Creatine with Metformin?
Creatine and metformin are generally safe together with normal kidney function; creatine raises serum creatinine, so tell your prescriber before starting.
Can I Take Folate with Metformin?
A guide to the metformin-folate interaction: mechanism, safety, MTHFR genetics, dosing, and monitoring recommendations backed by primary literature.
Can I Take Ginseng with Metformin?
Evidence-based guide on ginseng and metformin interactions, covering pharmacodynamic overlap, blood glucose effects, safety data, and clinical monitoring recommendations.
Can I Take Glutathione with Metformin?
A guide covering the pharmacokinetic and pharmacodynamic interaction between glutathione supplements and metformin, including safety, dosing, monitoring, and what the clinical evidence actually shows.
Can I Take Glycine with Metformin?
A guide to glycine and metformin together: interaction mechanisms, glycemic effects, dosing timing, and monitoring recommendations backed by primary literature.
Can I Take Green Tea Extract (EGCG) with Metformin?
A guide covering the pharmacokinetic and pharmacodynamic interactions between green tea extract (EGCG) and metformin, including hepatotoxicity risk, dosing windows, and monitoring recommendations.
Can I Take L-Theanine with Metformin?
A guide to the Metformin and L-theanine interaction: pharmacokinetics, pharmacodynamics, blood sugar effects, dosing, and safety monitoring.
Can I Take Lion's Mane with Metformin?
A guide to the lion's mane and metformin interaction: mechanisms, safety evidence, monitoring parameters, and practical dosing guidance for people with type 2 diabetes or prediabetes.
Can I Take Melatonin with Metformin?
A guide to the melatonin-metformin interaction: mechanism, glucose effects, safe dosing windows, and monitoring steps for people with type 2 diabetes or prediabetes.
Can I Take N-Acetylcysteine (NAC) with Metformin?
A guide to the NAC and metformin combination: pharmacokinetic and pharmacodynamic interactions, evidence from key trials, safety monitoring, and practical dosing guidance.
Can I Take Omega-3 (EPA/DHA) with Metformin?
Omega-3 (EPA/DHA) and metformin can be taken together, even at the same meal: no pharmacokinetic interaction. Both lower triglycerides by different routes.
Can I Take Quercetin With Metformin? A Clinical Review of the Interaction
A detailed clinical guide on combining quercetin and metformin: pharmacokinetic interactions, OCT2 transporter competition, lactic acidosis risk, dose-separation strategy, and monitoring recommendations.
Can I Take Reishi Mushroom with Metformin?
A clinical review of the reishi mushroom and Metformin interaction: mechanism, blood sugar effects, anticoagulant risk, monitoring, and what to do if you are already taking both.
Can I Take Resveratrol with Metformin?
A guide to the metformin-resveratrol combination: mechanisms, pharmacokinetic data, clinical trial evidence, dosing, and monitoring guidance for people managing type 2 diabetes or prediabetes.
Can I Take Rhodiola with Metformin?
A guide to the metformin-rhodiola interaction: mechanisms, blood glucose effects, serotonergic concerns, monitoring, and practical dosing guidance for patients on both.
Can I Take Saw Palmetto with Metformin?
Evidence-based guide to the saw palmetto and metformin interaction, covering pharmacokinetic data, safety considerations, dose-separation advice, and monitoring recommendations.
Can I Take St. John's Wort with Metformin?
A guide to the St. John's Wort and metformin interaction: mechanism, blood sugar effects, monitoring, and what to do if you take both.
Can I Take Turmeric / Curcumin with Metformin?
A guide covering the pharmacokinetic and pharmacodynamic interactions between turmeric (curcumin) and metformin, including dosing considerations, monitoring, and safety evidence.
Can I Take Vitamin B12 with Metformin?
Metformin can reduce vitamin B12 absorption over time. Here is what is established, what is still uncertain, and how clinicians typically monitor and manage B12 status in people taking metformin.
Can I Take Vitamin B6 with Metformin?
A guide covering the safety, interactions, and dosing considerations of combining vitamin B6 with metformin for type 2 diabetes or prediabetes management.
Can I Take Vitamin D with Metformin?
A guide covering the metformin-vitamin D interaction, deficiency risk, optimal dosing strategy, and monitoring thresholds for patients with type 2 diabetes or prediabetes.
Metformin and Magnesium: Timing, Product Labels and Kidney Function
Taking magnesium with metformin? Check product timing, elemental magnesium, diarrhea risks and kidney function before choosing a supplement.