Does Magnesium Help with Benzodiazepine Tapering and Withdrawal?

Why do patients on a benzodiazepine taper keep asking about magnesium.

Patients who taper a benzodiazepine with Dr. Mark Leeds often ask the same question early in the taper. Would magnesium help? It is a fair question, and it deserves an honest answer.

People ask for understandable reasons. Muscle tension, cramps, and broken sleep are common during a taper, magnesium is cheap and sold everywhere, and patient forums recommend it constantly. Taking a supplement also feels like doing something for yourself while the taper asks for patience.

So, what does magnesium do during a taper, and what does it not do? It may make some people a little more comfortable, it never changes the taper, and it carries a few cautions worth knowing.

The Ashton Manual says supplements are not generally needed.

Professor C. Heather Ashton wrote the manual that careful benzodiazepine tapers are built on. In Chapter III, on withdrawal symptoms, the Ashton Manual states that there is no general need for dietary supplements or extra vitamins or minerals during withdrawal, and that all of these can be harmful in excess. The Manual’s 2011 Supplement goes further, saying that no one should take supplements without clear evidence of a specific deficiency, and the Manual does not mention magnesium.

Beyond that, the evidence is thin, and Dr. Leeds says so plainly. Some of his patients report that magnesium eases muscle tension or helps them fall asleep, and others notice nothing. Any benefit is on comfort, never on the taper itself.

The same plain answer covers the other supplements patients ask about and nutrition during withdrawal. A normal, varied diet meets most needs. A supplement is at most a side question.

Magnesium tapering is not a method.

Some websites describe “magnesium tapering,” a plan that reduces the benzodiazepine while increasing magnesium. No such method exists. Neither the Ashton Manual nor the Maudsley Deprescribing Guidelines contains a magnesium protocol.

A taper is a taper. The schedule is set by the patient with the prescriber, using the Manual’s principle of reducing by up to one tenth of the dose at each step and the Maudsley pattern of hyperbolic reductions, where each cut gets smaller as the dose gets lower. The pace belongs to the patient, over months and sometimes longer, and a supplement never changes the reduction rate.

While this is not a perfect analogy, magnesium is like a cushion on a long bus ride. It may make the seat more comfortable, but it does not make the bus go faster or shorten the road. The road is the taper, and the only safe way down it is gradually.

Why gradually? Benzodiazepines strengthen the calming action of gamma-aminobutyric acid (GABA), the brain’s main inhibitory messenger, and with long use the GABA receptors become less responsive. Those changes reverse with time and a slow taper, not with a mineral.

Stopping suddenly can bring on seizures, a risk the 2020 boxed-warning update from the United States Food and Drug Administration (FDA) states plainly. Call emergency services for a seizure or any medical emergency.

That is also why the words matter. Physical dependence is not addiction. A person whose nervous system has adapted to a prescribed medication has a medical condition that calls for a gradual, medically supervised taper, not a program designed for addiction.

Which form of magnesium should a patient choose?

The bottles differ more in their side effects than in their benefits. Magnesium glycinate is the gentle one, easy on the stomach, and the form most patients tolerate. Magnesium citrate is a laxative, and it is useful only if you are constipated. The Manual does list constipation among the gastrointestinal symptoms of withdrawal, and constipation during a taper has its own page here.

Magnesium oxide is poorly absorbed and works mostly as an antacid or a laxative. Magnesium L-threonate is marketed for the brain, and that claim is unproven. If you try any form, take it with food, start low, and let diarrhea be the signal that the amount is too high.

The cautions that matter.

Anyone with kidney disease should not take magnesium without asking their doctor, because the kidneys clear it and it can build up to harmful levels. Diarrhea is the most common problem. Diuretics, or water pills, change how the kidneys handle magnesium, and some antibiotics bind to it in the gut, so magnesium is taken a few hours apart from those medicines.

One expectation needs correcting. Magnesium is not a sedative, and it will not cover a dose reduction that was too large or too soon. If a cut is not tolerated, the answer is to hold or slow down with your prescriber, never a bigger handful of a supplement.

Herbal sedatives are a different matter. Valerian, passionflower, and ashwagandha add sedation to a benzodiazepine and can muddy a taper. Tell your prescriber about every supplement you take, and discuss magnesium before you start it.

Does the answer change with Xanax, Klonopin, Ativan, or Valium.

No. The answer is the same for alprazolam (Xanax), clonazepam (Klonopin), lorazepam (Ativan), and diazepam (Valium), and for z-drugs such as zolpidem (Ambien), which act on the same receptors and are tapered on the same principles. The Xanax and magnesium glycinate question has its own page, with the same answer.

What changes from drug to drug is the taper, not the supplement. Table 1 of the Ashton Manual gives lorazepam a half-life of roughly ten to twenty hours, and alprazolam a shorter one still, which is why the Manual notes that people on short-acting benzodiazepines can feel symptoms between doses, while diazepam and its active metabolite linger for days. That is why Chapter II of the Manual crosses lorazepam and alprazolam over to diazepam before reducing, a crossover taper that trades a jagged blood level for a smooth, slow decline.

Some websites describe clonazepam as a drug added to help a taper along. It is not. Clonazepam is a drug patients taper from, and the benzodiazepine being tapered is never an “adjunct” to anything.

The Manual’s crossover drug is diazepam because it leaves the body so slowly. Magnesium sits beside all of this as a side question, never as part of the schedule.

Dr. Leeds’ practice in Fort Lauderdale, Florida, offers medically supervised benzodiazepine and z-drug tapering to patients in Florida, one physician working directly with each patient at the patient’s pace. For a straight answer about magnesium or any other supplement during a taper, Contact Dr. Leeds.

This article is educational. It is not medical advice, and reading it does not create a doctor-patient relationship. Decisions about starting, continuing, or tapering any medication should be made with your own physician.