Is Magnesium Glycinate Safe to Take with Adderall?

Automated draft updated April 27, 2026

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The Short Answer

Magnesium glycinate is considered safe to take alongside Adderall (amphetamine/dextroamphetamine) for most people, and there is no clinically significant pharmacokinetic interaction between the two. In fact, stimulant medications are associated with magnesium depletion over time, making adequate magnesium status particularly relevant for people using Adderall regularly.

Why Magnesium and Stimulants Are Often Discussed Together

Amphetamines elevate dopamine and norepinephrine signaling, which increases metabolic demand and can accelerate urinary excretion of certain minerals, including magnesium. Magnesium itself plays a central role in over 300 enzymatic reactions, including ATP synthesis, neurotransmitter regulation, and modulating NMDA glutamate receptors. Low magnesium status has been associated with increased anxiety, disrupted sleep, and irritability — all common complaints among Adderall users. Repleting magnesium through a well-absorbed form like magnesium bisglycinate may therefore help manage some of the side-effect burden without interfering with the medication's intended effects.

Evidence on Magnesium and ADHD

Several observational studies have found lower serum magnesium levels in children and adults diagnosed with ADHD compared to neurotypical controls. A small number of controlled trials have examined magnesium supplementation in ADHD populations, generally reporting modest improvements in hyperactivity and emotional reactivity when deficiency is corrected. It is important to note that magnesium does not replace stimulant medication and its benefits appear most pronounced in individuals who are actually deficient. Magnesium l-threonate, a form that shows enhanced central nervous system penetration in animal models, is sometimes discussed in the context of cognitive support, though robust human trials in ADHD specifically remain limited. Magnesium taurate is another form studied for its calming cardiovascular and neurological effects due to the taurine moiety.

Does Magnesium Reduce Adderall Effectiveness?

This concern occasionally arises because magnesium can alkalinize the urine, which theoretically slows amphetamine excretion and prolongs its half-life rather than reducing its effect. In practice, supplemental doses in the typical range (100–400 mg elemental magnesium per day) do not produce a clinically meaningful shift in urinary pH for most people. There is no evidence that magnesium glycinate meaningfully blunts or amplifies Adderall's therapeutic effect at standard supplemental doses. If you are on a carefully titrated stimulant dose and wish to start supplementing, informing your prescriber is always advisable.

Dosage and Form Guidance

For adults using Adderall, a commonly used target is 200–400 mg of elemental magnesium daily from a well-tolerated form. Magnesium glycinate and its closely related form magnesium bisglycinate are among the best-tolerated options because the glycine chelate reduces the osmotic laxative effect seen with magnesium oxide or high-dose magnesium citrate. Magnesium citrate is a reasonable alternative at lower doses. Splitting the dose — for example, 100–200 mg in the morning and 200 mg in the evening — may help maintain steadier tissue levels. Taking magnesium in the evening may support sleep quality, a common concern for Adderall users whose medication has worn off.

Practical Safety Considerations

Kidney function: Individuals with impaired renal function should consult a healthcare provider before supplementing magnesium, as the kidneys regulate excretion.
Timing: There is no strong evidence requiring a specific gap between Adderall and magnesium doses, but separating them by 1–2 hours is a conservative approach sometimes recommended to avoid any theoretical absorption interference.
GI tolerance: Magnesium bisglycinate is well tolerated at therapeutic doses; loose stools are a signal to reduce dose.
Drug interactions: Magnesium can reduce absorption of certain antibiotics (tetracyclines, fluoroquinolones) and bisphosphonates — separate by at least 2 hours if applicable.
Labs: If you suspect deficiency, a serum magnesium or RBC magnesium test provides useful baseline data.

Frequently asked questions

Can magnesium glycinate make Adderall less effective?

At standard supplemental doses (200–400 mg elemental magnesium), magnesium glycinate is not known to reduce Adderall's therapeutic effect. While magnesium can mildly alkalinize urine, this effect is not clinically significant at typical doses and does not meaningfully alter amphetamine pharmacokinetics.

When is the best time to take magnesium glycinate with Adderall?

Many people find it convenient to take part of their magnesium dose in the morning with food and the remainder in the evening to support sleep as Adderall wears off. Separating the two by 1–2 hours is a conservative approach, though no strong clinical evidence mandates a specific timing window.

Does Adderall deplete magnesium?

Stimulant medications like Adderall are associated with increased urinary magnesium excretion over time, which can contribute to suboptimal magnesium status. This is one reason magnesium supplementation is frequently discussed in the context of long-term stimulant use, particularly when symptoms like poor sleep or anxiety are present.

How much magnesium glycinate should I take if I use Adderall?

A common evidence-informed range is 200–400 mg of elemental magnesium per day from a chelated form like magnesium glycinate or bisglycinate. Starting at the lower end and adjusting based on tolerance and symptom response is prudent; consult your prescriber or a registered dietitian for personalised guidance.