Can I take Magnesium and Sertraline together?
Drug interaction guide
Originally published 24 Jan 2026
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There is no known direct interaction between magnesium supplements and sertraline. It is generally considered safe to take them together.
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Why this happens
Magnesium does not significantly affect how the body absorbs, breaks down, or removes sertraline. Additionally, the two substances work on different systems in the body and do not interfere with each other's effects.
What you should do
You can take magnesium and sertraline together. However, if you are taking magnesium for sleep or anxiety, it is best to discuss this with your doctor to ensure your sertraline dose is correctly managed. If you experience any unusual side effects, such as extreme drowsiness or an upset stomach, contact your pharmacist.
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Important precautions
Trastornos hemorrágicos
Sertraline can increase your risk of serious bleeding, especially if you are also taking aspirin, ibuprofen, or blood-thinning medications like warfarin.
Kidney disease
If you have significant kidney problems, your body cannot clear magnesium properly. This can lead to a dangerous build-up in your blood that affects your heart and breathing.
Low sodium levels (Hyponatraemia)
Sertraline can cause a serious drop in blood sodium levels, particularly in the elderly. Seek medical help if you experience sudden confusion, fits, or extreme weakness.
Food and drink warnings
Alcohol
You should avoid drinking alcohol while taking sertraline. Alcohol can increase the sedative effects of the medicine, making you feel more sleepy, dizzy, or uncoordinated. It can also worsen the symptoms of depression or anxiety that the medicine is treating.
Grapefruit juice
Avoid drinking large amounts of grapefruit juice. Grapefruit contains compounds that can increase the levels of sertraline in your blood, which may increase the risk of side effects.
Dairy products and high-calcium foods
Try to avoid taking magnesium supplements at the exact same time as large amounts of dairy (like a large glass of milk) or calcium supplements. Calcium and magnesium can compete for absorption in the body, meaning you may not get the full benefit of the dose. It is best to space them out by at least 2 hours.
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Using other medicines?
Taking multiple medicines? Our Medicines Interaction Checker helps you check whether your prescriptions, over-the-counter medicines, and supplements are safe to take together. Simply search for your medicines to see potential interactions and what to do about them.
Descargo de responsabilidad
This information is for general educational purposes only and should not be relied upon as a substitute for professional medical advice. Always consult your GP, pharmacist, or another qualified healthcare professional before making decisions about your medications. Individual circumstances may vary, and only a healthcare professional who knows your medical history can provide personalised guidance.
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Historia del artículo
La información de esta página ha sido redactada y revisada por médicos cualificados.
24 Enero 2026 | Publicado originalmente

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