Supplement stacks / Cephalexin + Magnesium
Can You Take Cephalexin with Magnesium?
Cephalexin and Magnesium: one interaction flagged, scored 7/10 (medium risk). The count and score come from an AI-written analysis checked against our interaction rules, which can only make it stricter. Not medical advice.
Safety at a glance
This score comes from an AI-written analysis of the pair. Our interaction rules check it and can only make it stricter, never milder. Informational only: it can't account for your medications, conditions, or genetics.
What the AI-written analysis says
Taking Cephalexin with Magnesium may lead to reduced absorption of the antibiotic, potentially decreasing its effectiveness. It is advisable to space the intake of these substances to mitigate this risk.
Cephalexin is a prescription medication. This page describes publicly documented interactions — it can't see your dose, your other prescriptions, or your labs. Discuss any supplement with the prescriber or pharmacist who manages this medication before combining.
Known interactions
Magnesium may interfere with the absorption of Cephalexin, potentially reducing its effectiveness. It is recommended to separate the intake of these substances by at least 2-4 hours.
Cephalexin
From the AI-written analysis.
Generally well-tolerated, but may cause gastrointestinal upset or allergic reactions in some individuals.
Typical dosage: As prescribed or as directed on the label
- Nausea
- Diarrhea
- Rash
- Consult healthcare provider for potential interactions with other medications.
Magnesium
From the AI-written analysis.
Generally safe at recommended dosages, but excessive intake can lead to diarrhea and abdominal cramping.
Typical dosage: 200-400 mg daily.
- Diarrhea
- Nausea
- Abdominal cramping
- Individuals with kidney disease should avoid magnesium supplementation.
Timing
Take as prescribed — we do not schedule prescription medications. Follow the label or your prescriber, and ask your pharmacist before changing when you take it.
Frequently asked questions
Can you take Cephalexin and Magnesium together?
Cephalexin and Magnesium: one interaction flagged, scored 7/10 (medium risk). The count and score come from an AI-written analysis checked against our interaction rules, which can only make it stricter. Not medical advice.
What score does the Cephalexin and Magnesium combination get?
The Cephalexin and Magnesium combination is scored 7/10 (medium risk). The score comes from an AI-written analysis checked against our interaction rules, which can only make it stricter. Not medical advice. Always confirm with a healthcare professional.
When should you take Cephalexin and Magnesium?
Take as prescribed — we do not schedule prescription medications. Follow the label or your prescriber, and ask your pharmacist before changing when you take it.
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Not medical advice
AI-written analysis generated August 28, 2026, checked by our interaction rules · How our analysis works