Ambien Drug Interactions: Medicines, Foods and Supplements

Quick answer: The interactions that matter most with Ambien (zolpidem) are with other drugs that cause drowsiness or slow breathing: alcohol, opioids, benzodiazepines, sedating antihistamines, muscle relaxants, gabapentinoids, sedating antidepressants and antipsychotics, and sleep aids of any kind. A second group changes how much zolpidem is in your body: some antifungals and antivirals raise it, while rifampin and St. John’s wort can lower it. Food matters too, because a heavy meal can slow the tablet’s effect. Always give your prescriber and pharmacist a complete list of everything you take.

Most interaction articles give you a long alphabetical list and leave you to work out what it means. This one is organized as a map. Each substance is placed on a traffic-light scale, and each entry explains why the interaction happens, which makes it easier to spot new combinations on your own. It is meant to help you ask better questions at the pharmacy counter, not to replace a pharmacist’s check of your full medicine list.

In this guide: Why interactions happen · The interaction map · Red: avoid or only with a plan · Amber: use caution · Green: little or no known interaction · Foods and drinks · Supplements and herbal products · Health conditions that act like interactions · The pharmacist check · Your medicine list template · FAQs

Why interactions happen: two main mechanisms

Mechanism 1: Added sedation (pharmacodynamic interactions)

Zolpidem calms the brain by strengthening the effect of GABA at the GABA-A receptor. Many other substances also depress the central nervous system (CNS), and their effects add together. The result can be much deeper drowsiness, slowed breathing, confusion, poor coordination, memory gaps, and a higher chance of complex sleep behaviors such as sleepwalking or sleep-driving. The prescribing information advises that dosage adjustment of zolpidem and of other CNS depressants may be needed when they are used together. For background on how the drug works, see our guide to Ambien uses and how it works.

Mechanism 2: Changed blood levels (pharmacokinetic interactions)

Your liver breaks zolpidem down using several enzymes, with a major role played by one called CYP3A4. Medicines or substances that block this enzyme can raise zolpidem levels, so you feel more sedated for longer. Those that boost it can lower levels, so the tablet may not work as well. Food can also change how fast the drug is absorbed.

Knowing the two mechanisms means you can ask two simple questions of any new medicine: “Does this make me sleepy or slow my breathing?” and “Does this affect liver enzymes?”

The interaction map

Color	Meaning	What to do
Red	Combination with a significant risk of serious harm, or one that requires a specific plan from your prescriber	Do not combine on your own. Ask your prescriber before starting either medicine
Amber	Combination that may add sedation or change zolpidem levels, often manageable with a dose adjustment or extra care	Tell your prescriber and pharmacist. Do not self-adjust
Green	No meaningful interaction is documented in the labeling, though no list is complete	Still keep your medicine list up to date

This map is a general education tool and is not exhaustive. New drugs, individual health conditions, and doses all change the picture.

RED: avoid, or use only with a prescriber’s plan

Alcohol

Alcohol is the most common and most dangerous interaction. Both substances depress the CNS, and together they raise the risk of extreme sedation, breathing problems, blackouts, and complex sleep behaviors. Read our dedicated guide on drinking alcohol while taking Ambien.

Opioid pain medicines

Opioids such as oxycodone, hydrocodone, morphine, codeine, tramadol, and methadone slow breathing on their own. Adding a sedative-hypnotic increases the risk of profound sedation and respiratory depression. Opioid labels carry strong warnings about combining them with other CNS depressants. If you take a prescription opioid, tell your prescriber before taking Ambien. For background on opioid comparisons on this site, see oxycodone vs hydrocodone and methadone and tramadol.

Benzodiazepines and other sedative-hypnotics

Alprazolam (Xanax), lorazepam (Ativan), clonazepam, diazepam, temazepam (Restoril), and similar drugs act on the same receptor system. Taking them together with zolpidem stacks sedative effects and raises the risk of overdose. Taking two sleeping pills, such as Ambien with Lunesta or Restoril, is generally not appropriate unless a specialist has a specific reason. See Ativan vs Xanax, Ambien vs Lunesta, and Ambien vs Restoril for how these relate.

Sodium oxybate

This prescription medicine for narcolepsy is a strong CNS depressant. Combining it with other sedatives is generally avoided and is only done under specialist supervision.

Anyone who has had a complex sleep behavior on zolpidem

This is not an interaction but a contraindication: the label says not to take zolpidem again after a complex sleep behavior. Mixing it with any other sedating substance makes episodes more likely. See Ambien side effects.

Recreational or non-prescribed sedatives

Street drugs, non-prescribed pills, and “party” combinations involving GHB, sedatives, or opioids carry very high overdose risk with zolpidem.

AMBER: use caution and tell your prescriber

Other drugs that cause drowsiness

Sedating antihistamines: diphenhydramine (Benadryl and many “PM” products), doxylamine, hydroxyzine, and chlorpheniramine. These are in many over-the-counter sleep and cold products, so they are easy to double up by accident.
Muscle relaxants: cyclobenzaprine, baclofen, carisoprodol, methocarbamol, and tizanidine.
Gabapentinoids: gabapentin and pregabalin. Regulators have warned about breathing problems when these are combined with other CNS depressants, particularly in older adults and people with lung disease. See gabapentin vs Lyrica and oxycodone vs gabapentin.
Sedating antidepressants: trazodone, mirtazapine, amitriptyline, doxepin, and imipramine. The zolpidem label specifically notes reduced alertness when combined with imipramine.
Antipsychotics: such as quetiapine, olanzapine, and chlorpromazine. The label notes reduced alertness and psychomotor performance with chlorpromazine.
Anti-seizure medicines: such as phenobarbital, primidone, and some others, which add sedation.
Anxiety medicines and some blood pressure medicines that cause drowsiness, such as clonidine.
Medical cannabis, CBD, and THC products: may add to drowsiness and impair coordination. Effects vary widely by product.

Medicines that can raise zolpidem levels (CYP3A4 inhibitors)

These may increase the amount of zolpidem in your blood and make you more sedated for longer. Examples include:

Azole antifungals such as ketoconazole and itraconazole. The label describes increased zolpidem exposure with ketoconazole.
Certain HIV protease inhibitors, such as ritonavir-containing regimens
Some macrolide antibiotics, such as clarithromycin
Some other medicines that inhibit this enzyme

Your prescriber may suggest a lower zolpidem dose, avoid the combination, or watch more closely. Never adjust doses yourself.

Medicines that can lower zolpidem levels (CYP3A4 inducers)

Rifampin, an antibiotic used for tuberculosis and some other infections, can substantially reduce zolpidem exposure, and the label notes a reduced effect. Other enzyme-inducing medicines, including some anti-seizure drugs such as carbamazepine and phenytoin, may do something similar. If Ambien suddenly “stops working” after you start a new medicine, tell your doctor rather than taking extra tablets.

SSRIs and other antidepressants

Selective serotonin reuptake inhibitors (SSRIs) such as sertraline have been studied with zolpidem. The label reports some changes in blood levels with sertraline, and additive drowsiness can occur with several antidepressants. Many people take both safely under supervision, but the combination warrants a conversation.

Stimulants

Stimulants such as amphetamine salts and methylphenidate keep you alert, so people sometimes take them with a sleep aid to counteract insomnia. This is a “push and pull” scenario, and there is a risk of relying on drugs to switch your brain up and down. It is not a typical direct pharmacokinetic interaction, but it is a pattern prescribers like to review. See Adderall and sleep problems and Adderall drug interactions for the stimulant side.

Other sleep aids and cold remedies

Many nighttime cold, flu, allergy, and pain products contain a sedating antihistamine, sometimes plus alcohol. Check the “active ingredients” list, and ask a pharmacist. Our article on oxycodone and Tylenol shows how combination products can hide extra ingredients.

GREEN: no meaningful interaction found in the labeling (but keep reporting)

The zolpidem prescribing information describes studies in which several common medicines showed no significant effect on zolpidem or vice versa. Examples noted in the label include warfarin (a blood thinner), digoxin (a heart medicine), and ranitidine, an older acid reducer that has been withdrawn in many markets. Absence from a label’s list does not guarantee safety for your unique health situation, and formulations and combinations change over time. Treat “green” as “no known issue,” not “approved for you.”

Ordinary medicines such as many standard blood-pressure tablets (those that do not cause drowsiness), statins, and thyroid replacement are generally not flagged for direct interaction, but you should still show your complete list to a pharmacist.

Foods and drinks

Meals: amber

Zolpidem works faster on an empty stomach. The prescribing information says that taking it with or right after a meal slows how quickly it is absorbed and reduces how fast it works. If you take it right after dinner and wait for it to kick in, you may lie awake and be tempted to take a second dose, which is not safe. Take it as your prescriber instructs, generally right before bed.

Alcohol: red

See above, and read our full guide.

Caffeine: amber

Caffeine does not interact chemically in a dangerous way, but it works against the drug. Coffee, tea, cola, energy drinks, and chocolate in the afternoon or evening can keep you awake, tempting you to rely on a pill or a higher dose. If you have insomnia, cutting caffeine after midday is a first step.

Grapefruit and grapefruit juice: uncertain, ask

Grapefruit can inhibit the CYP3A4 enzyme in the gut, and zolpidem is partly processed by that pathway. Product labeling for zolpidem does not feature a strong grapefruit warning the way it does for some other drugs, and the evidence for a meaningful effect is limited. Because individual response varies and the effect is hard to predict, many pharmacists suggest keeping intake modest or asking about it if you consume it regularly. This is a “check with your pharmacist” item rather than a firm rule.

High-fat meals and late heavy meals

These may delay absorption, and eating too close to bedtime can also disturb sleep.

Energy drinks and “sleep” drinks

Energy drinks often contain very high caffeine plus other stimulants, while some “relaxation” drinks contain kava, melatonin, or other sedating ingredients. Both categories can complicate sleep medicine use.

Supplements and herbal products

Supplements are not tested the way prescription drugs are, and strengths vary between brands. That makes interactions harder to predict. Always tell your pharmacist about everything you take.

Supplement	Color	Why
St. John’s wort	Amber to red	Induces liver enzymes and can lower levels of many drugs, including those processed via CYP3A4. The zolpidem label notes St. John’s wort may reduce exposure. It also interacts with antidepressants. See the NCCIH page on St. John’s wort
Kava	Red	Has sedating effects and has been linked with liver injury, so combining it with a sedative is a concern. See NCCIH on kava
Valerian	Amber	Used as a sleep aid and may add to drowsiness. Evidence for benefit is mixed. See NCCIH on valerian
Melatonin	Amber	Generally has a lower risk profile, and doctors sometimes consider it, but product strength is inconsistent and it can add to next-day grogginess. Check with your prescriber
Passionflower, lemon balm, chamomile, hops	Amber	Mildly sedating herbs that may add to drowsiness, particularly in concentrated products
L-theanine, magnesium, glycine	Green to amber	Often used for sleep and generally regarded as low risk at typical doses, but they are not risk-free and can vary by product. Mention them to your pharmacist
5-HTP, tryptophan	Amber	Affect serotonin and may interact with antidepressants. May add drowsiness
CBD and cannabis products	Amber	May add sedation and affect liver enzymes, depending on the product and dose
Ashwagandha	Amber	May cause drowsiness and has been associated with rare liver problems

“Natural” does not mean “interaction-free.” If you are comparing sleep approaches, our guide to Ambien uses covers non-drug options like CBT-I that avoid interaction problems altogether.

Health conditions that act like interactions

Sometimes the risk is not another drug but a condition that changes how you handle zolpidem.

Liver impairment: slower clearance, so a lower dose is recommended, and the label advises caution.
Kidney disease: may need monitoring, though changes are generally less pronounced.
Sleep apnea, COPD, asthma, or other breathing conditions: sedatives can worsen breathing during sleep.
Older age: greater sensitivity to sedation and fall risk, so the lower dose is advised.
Depression or suicidal thoughts: sedative-hypnotics can mask or worsen mood symptoms.
Substance use history: raises misuse and dependence risk.
Myasthenia gravis: muscle weakness may worsen with sedatives.
Pregnancy and breastfeeding: special considerations apply. See Ambien during pregnancy and breastfeeding.

The pharmacist check: what to say and ask

A short conversation with a pharmacist is one of the most effective safety steps available, and it is usually free. Use a script like this.

“I am taking or about to start Ambien (zolpidem).” Say the dose and form: immediate-release, extended-release, sublingual, or spray.
“Here is my full list of medicines.” Include prescriptions, over-the-counter products, vitamins, herbs, cannabis or CBD, and anything you take “occasionally.”
“Do any of these add sedation or affect liver enzymes?” This covers both mechanisms.
“Do I need a different dose or timing?”
“Is there anything I should avoid at night, such as cold medicines?”
“What warning signs should I watch for?” See Ambien side effects.
“What should I do if I miss a dose or need to take something new?” See what to do after a missed dose of Ambien.

If you use several pharmacies, use one for everything or ask each to keep a complete profile. Online interaction checkers can be a useful starting point, but they do not replace professional review. The MedlinePlus zolpidem page and the Medication Guide that comes with your prescription give the standard safety information.

Your medicine list template

Copy this table into a note on your phone or print it and keep it in your wallet. Update it whenever anything changes.

Name (brand and generic)	Dose and form	Why I take it
Ambien (zolpidem)		Insomnia


Vitamins and supplements
Over-the-counter products
Alcohol, caffeine, cannabis	Typical amount and timing

When an interaction becomes an emergency

Call your local emergency number if someone who has taken Ambien with another sedating substance:

Cannot be woken, or is extremely drowsy and confused
Has slow, shallow, or noisy breathing, or pauses in breathing
Has blue or gray lips or skin
Has fainted, collapsed, or has a very slow heartbeat
Has had a seizure

In the United States, Poison Control is available at 1-800-222-1222. Do not wait to see whether symptoms pass.

Frequently asked questions

What should not be taken with Ambien?

Avoid alcohol, and do not combine Ambien with opioids, benzodiazepines, other sleeping pills, or sodium oxybate unless a prescriber has specifically planned it. Be cautious with sedating antihistamines, muscle relaxants, gabapentinoids, and sedating antidepressants and antipsychotics.

Can I take Ambien with Benadryl or other sleep aids?

This adds sedation and raises the risk of next-day impairment and confusion, especially in older adults. Ask your pharmacist before combining them.

Can I take Ambien with melatonin?

Some doctors consider it, but there is no guarantee of benefit, and combined effects can add to grogginess. Ask your prescriber.

Can I take Ambien with an antidepressant?

Many people do under medical supervision, but some antidepressants add sedation or affect zolpidem levels, so your prescriber should know. Do not stop an antidepressant on your own.

Can I take Ambien with pain medicine?

Opioid pain medicines carry the highest risk because both slow breathing. Non-opioid options such as acetaminophen are not typically flagged for direct interaction, but check all combination products. Always ask your prescriber.

Does grapefruit interact with Ambien?

Grapefruit can affect the enzyme that processes zolpidem, but evidence of a major effect is limited. If you regularly drink grapefruit juice, ask your pharmacist.

Should I take Ambien with food?

Generally on an empty stomach or as directed. A meal taken with or just before the tablet can delay and weaken its effect.

Does caffeine interfere with Ambien?

Caffeine works against sleep and may reduce how well you sleep, even if it does not chemically interact in a dangerous way. Limit it in the afternoon and evening.

Does Ambien interact with birth control?

The zolpidem labeling does not flag a significant interaction with hormonal contraceptives, but always confirm with your prescriber and pharmacist, since individual products vary.

Can Ambien interact with other medicines I take for ADHD?

The two types work in opposite directions, and stimulants often cause insomnia. Discuss the sleep problem with your prescriber rather than adding a hypnotic by default. See Adderall and sleep problems.

What should I do if I accidentally took two sedating medicines?

Do not take any more, stay with someone, do not drive, and call a pharmacist, doctor, or poison center. Seek emergency care if you have trouble breathing or cannot stay awake.

The bottom line

Ambien interactions come down to two ideas: anything that adds sedation is a concern, and anything that changes how your liver processes zolpidem can change how strongly it acts. Alcohol, opioids, benzodiazepines, and other sedatives sit in the red zone. Many everyday products, including cold medicines, antihistamines, muscle relaxants, gabapentinoids, some antidepressants, and herbal sleep supplements, sit in amber. Keep an up-to-date medicine list, use one pharmacy where you can, take the tablet as directed, and ask before adding anything new, including “natural” products.

Medical disclaimer: This article is for general education and is not a substitute for professional medical advice, diagnosis, or treatment. It is not an exhaustive list of interactions. Always review your complete medicine list with a qualified healthcare professional or pharmacist. In an emergency, call your local emergency number.

Sources and further reading: FDA: Ambien prescribing information (check Drugs@FDA for the latest version) · MedlinePlus: Zolpidem · NCCIH: St. John’s wort · NCCIH: Kava · NCCIH: Valerian