L-Theanine for Benzodiazepine Withdrawal & Tapering

Can L-theanine help with benzodiazepine withdrawal?

It can help a little, for some patients, with the anxiety and broken sleep that a taper stirs up, and it does nothing at all to the taper itself. L-theanine is an amino acid found in tea leaves, sold in capsules as a calming supplement, and it is one of the first things patients ask Dr. Mark Leeds about when a dose reduction starts to bite.

The question underneath it is usually bigger. Can something natural take the place of the benzodiazepine, or at least let the dose come down faster? Unfortunately, the answer is no on both counts, and a page that says otherwise does harm, because it invites a reader to drop the medication and lean on a supplement that cannot do the medication’s job.

A person who has taken Xanax (alprazolam), Klonopin (clonazepam), Ativan (lorazepam) or Valium (diazepam) as prescribed, and now cannot stop without symptoms, has physical dependence, a medical condition caused by the medication. Physical dependence is not addiction.

In fact, most patients who come to a doctor for a taper have never misused a pill, and the treatment for their condition is a slow, medically supervised taper, not a supplement. So, where does L-theanine fit?

What L-theanine is, and what it is not.

L-theanine gives green tea part of its savory taste, and a cup of tea contains a small amount of it. As a supplement it is sold in much larger amounts, without the caffeine, by companies that are not required to prove it works before they sell it. Quality varies from bottle to bottle, and the claims on the label are marketing, not medicine.

What it is not matters more. L-theanine is not a benzodiazepine, and it does not act at the benzodiazepine site on the receptor the medication has been working on. Gamma-aminobutyric acid (GABA) is the brain’s main calming neurotransmitter, and benzodiazepines work by amplifying its effect at the GABA-A receptor, which is why they quiet anxiety so quickly and why the brain adapts to them so thoroughly.

L-theanine may nudge GABA and glutamate signaling, though how it works in people is not settled. Nudging a signal from outside is a far weaker thing than occupying the receptor the brain has adjusted itself around. When the dose comes down, those receptors need time to readjust, and no supplement supplies what the missing dose supplied.

So, the rebound anxiety or the wide-awake night that follows a cut is the nervous system reacting to the change, and L-theanine does not cancel it. At most, it softens the edge.

L-theanine does not replace the benzodiazepine, and it does not speed the taper.

L-theanine is often marketed as a natural replacement for a benzodiazepine. A reader who takes that at face value stops the medication and starts the supplement, and what they have actually done is stop a benzodiazepine abruptly. The 2020 United States Food and Drug Administration (FDA) boxed-warning update for the whole benzodiazepine class says that stopping abruptly or reducing the dose too quickly can cause withdrawal reactions, including seizures, which can be life-threatening, and that a gradual taper should be used instead. A seizure is a medical emergency, and anyone who has one needs emergency services called at once.

Nor does the supplement shorten the taper. The Ashton Manual, written by Professor C. Heather Ashton and published at benzo.org.uk, suggests in Chapter II reducing by up to one tenth of the dose at each step, and it is emphatic that the patient is the best judge of the pace. The Maudsley Deprescribing Guidelines describe hyperbolic reductions, in which each cut is a proportion of the current dose, so the steps grow smaller as the dose falls. Nothing in either approach changes because a supplement was added.

Think of the taper as a long staircase down. A supplement is, at best, a bit of carpet on a step: it may soften the landing, but it removes no steps and it does not let anyone take two at a time. The Manual says much the same in Chapter II about aromatherapy, acupuncture and yoga: some people find them helpful, but they probably act only as an aid to relaxation. L-theanine belongs in that company.

What patients report, and how thin the evidence is.

Patients who try it describe something modest. Some say it takes the edge off the jittery afternoon that follows a dose cut, and some use it at bedtime when a reduction has brought back the insomnia that led to the prescription in the first place. Others notice nothing, and a few feel drowsier than they wanted.

The effect, when it is there, is mild, and nothing like the effect of a medication. That is worth saying, because patients in withdrawal have unpredictable sensitivities and are understandably wary of anything new, and a supplement that promises more than it delivers costs them trust as well as money.

The human evidence is small: a handful of short trials on relaxation, sleep quality and attention in people who were not tapering anything, and no trial at all in benzodiazepine withdrawal. So, what is written above is clinical experience, which varies from patient to patient. L-theanine has not been shown to shorten withdrawal, prevent it or treat it.

The cautions Dr. Leeds gives before a patient tries it.

Calm adds to calm. L-theanine adds to drowsiness when it is taken alongside a benzodiazepine, a z-drug such as Ambien (zolpidem), which is a sleeping pill acting on the same receptor, or any other sedating medicine. The sum is what matters for driving, for balance and for an older patient’s risk of a fall.

Every sedating medicine on the list raises the same question, and a calming supplement belongs on that list, even though the bottle calls it natural. L-theanine can also lower blood pressure a little. A patient who already takes blood pressure medication, or who gets lightheaded on standing, should know that before the first capsule, and so should the doctor.

Pregnancy and breastfeeding call for caution too, because the supplement has not been studied well enough there to say anything reassuring. Side effects are uncommon and mild: a headache, an upset stomach, an unwelcome sleepiness. Anyone who feels worse should stop taking it and say so.

Every supplement goes on the medication list, because a physician reading a taper needs to know whether a new sleepiness came from the last cut or from a new bottle. The amount is a separate conversation. The number on the label was chosen by a manufacturer, not by anyone who knows the patient, and Dr. Leeds discusses it individually, with the benzodiazepine dose, the other medicines and the blood pressure in front of him.

Where a supplement fits in a gradual, supervised taper.

The taper is the treatment. In Dr. Leeds’ practice that means a reduction plan drawn for the person, sometimes a crossover taper to diazepam as the Ashton Manual describes when a short-acting drug is causing interdose withdrawal, the symptoms that surface between doses, hyperbolic reductions in the Maudsley shape, and a hold whenever the symptoms ask for one. The pace belongs to the patient, over months and sometimes longer, and it is never set by a calendar.

A supplement question is handled like any other question about the plan. Some patients get a cautious trial of L-theanine, with the cautions above spelled out first, and some are told it is not a good idea for them because of blood pressure or because they are already sedated enough. Nobody is told it will make the taper faster, and nobody is told to stop the medication and take it instead.

That is informed consent as Dr. Leeds practices it: the risks first, the alternatives including doing nothing, an exit plan for the medication itself, and the patient’s right to say no to any of it. It applies to a supplement just as much as to the taper. Fortunately, the decision is rarely hard, because a supplement that helps a bit and does no harm is usually allowed, and one that adds sedation is usually not.

What matters more than the supplement.

Time and a slow taper do the healing. Fear of withdrawal is what sends people looking for a natural replacement, and the fear is understandable, because the symptoms can be severe in a way that people who have not felt them cannot imagine. Yet, they do ease as the nervous system readjusts, and a taper paced to the person gives it room to do that.

While L-theanine can keep a patient company on the way down, it is the taper, the holds and the doctor’s willingness to slow down that carry them to the bottom of the stairs. Anyone who wants to try it should raise it with their taper doctor first and expect a plain answer.

Dr. Leeds’ practice in Fort Lauderdale offers medically supervised benzodiazepine and z-drug tapering to patients throughout Florida, one physician working directly with each patient on a plan built on the Ashton Manual and the Maudsley Deprescribing Guidelines, at the patient’s own pace. Questions about L-theanine, or any other supplement, are welcome at any visit. Contact Dr. Leeds to ask about a supervised taper.

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.