Some types of medications known to inhibit CYP2D6 include certain SSRIs and tricyclic antidepressants, some antipsychotics, and the commonly available antihistamine diphenhydramine. Therefore, the potential for interactions exists between dextromethorphan and medications that inhibit this enzyme, particularly in slow metabolizers. The drug interactions listed above are not all of the possible interactions or adverse effects.
Dextromethorphan Brand-name Versions
In 2006, the National Survey on Drug Use and Health (NSDUH) reported that approximately 3.1 million people aged between have abused Dextromethorphan. This survey also indicated that in adults, more men than women were prone to abuse this substance. It is available in different dosage forms with different DXM dosage strengths. Although there are various forms of DXM on the market, only a medical professional is able to help a patient prescribe the DXM drug properly.
Dextromethorphan Interactions
It can force the mind into a state of altered reality and dissolve the concept of self vs. others. If you feel as though someone may be overdosing on DXM, call 911 immediately — DXM overdose can be lethal if proper medical support isn’t administered immediately. At this dose, the effects feel much more similar to alcohol but with a pronounced reduction in cognitive function.
DXM addiction is real and may lead to severe effects such as liver damage and respiratory complications. Furthermore, DXM can become a gateway to hard drugs for teenagers. The FHE Health team is committed to providing accurate information that adheres to the highest standards of writing. This is part of our ongoing commitment to ensure FHE Health is trusted as a leader in mental health and addiction care.
Support groups and individual counseling play a crucial role in the recovery process. These resources provide emotional support, practical advice, and a sense of community for individuals struggling with DXM addiction. Johnson, Journal of Substance Abuse Treatment (2023), highlights these psychological impacts as prevalent among long-term users. High doses of DXM have been linked to dangerous behavior that stems from effects like hallucinations, psychosis, and agitation. DXM depresses the central nervous system (CNS), which controls your breathing.
Side Effects Of DXM
In spite of government efforts to stop the abuse of Dextromethorphan cough syrup by teenagers, it is easily accessible through stores and online sources. Dextromethorphan extraction from syrups is relatively easy, making it even harder to control the abuse among teens. Taking too much Dextromethorphan can significantly damage the health.
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This is the level most people aim for when out at a club or party. Double-check the potency of the DXM you’re using, and look for the addition of other compounds such as acetaminophen which can cause severe liver-toxic side-effects at this dose. Call your doctor if you experience any unusual problems while you are taking this medication. If you’re concerned about misuse or dependence while taking dextromethorphan, talk with your doctor. Dextromethorphan misuse is dangerous, and there have been reports of fatal overdoses. Do not give dextromethorphan or any other medications to a pet unless your veterinarian recommends it.
Is DXM Safe?
For those who find themselves using the drug regularly at this level, it can become an addiction with noticeable health effects. However, regular use can result in tolerance, cravings, and psychological dependence. Heavy, chronic users may experience unpleasant withdrawal symptoms upon cessation of the drug. These withdrawal symptoms aren’t well defined, but they have been reported to be similar to SSRI-induced withdrawals. The recreational use of DXM grew in the 1990s when widespread internet access allowed the purchased of pure DXM hydrobromide powder from online retailers in bulk.
Serious Side Effects

For more information about dextromethorphan and depression, see this article. It’s not known whether dextromethorphan is safe to take during pregnancy. If you’re sexually active and you or your partner can become pregnant, talk with your doctor about your birth control needs while you’re taking dextromethorphan.
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Misusing dextromethorphan for these effects can cause harmful side effects, such as breathing problems. To learn more about this, see “Overdose” in the “Dextromethorphan dosage” section above. As with most drugs, some people can have an allergic reaction after taking dextromethorphan. Also a very common question is “what age do I have to be to do this drug”…

The interaction between DXM and drugs such as alcohol, acetaminophen, and other OTC cough and cold medicines can be highly toxic. Finding help and support for DXM addiction involves utilizing several resources like addiction treatment centers, support groups, healthcare providers, hotlines, and online resources. According to the Substance Abuse and Mental Health Services Administration (SAMHSA), accessing these resources is crucial for effective recovery. Adolescents and young adults are particularly vulnerable to DXM addiction due to factors such as peer pressure, curiosity, and the accessibility of DXM-containing medications. According to the Substance Abuse and Mental Health Services Administration (SAMHSA), this age group is more likely to experiment with substances, increasing the risk of addiction. The lack of awareness about the dangers of DXM abuse further exacerbates this issue.

Dextromethorphan Interaction With Antidepressants
- Here’s dextromethorphan dosage information for cough in adults.
- DXM is a semisynthetic antitussive medication found in hundreds of over-the-counter cold medications around the world.
- DXM also has mild serotonin and norepinephrine reuptake inhibitors — which means it can increase the concentrations of serotonin and norepinephrine in the brain.
- This alteration can lead to both short-term psychoactive effects and long-term neurochemical changes that contribute to addiction.
But if they become bothersome, talk with your doctor or pharmacist. Like most drugs, dextromethorphan may cause mild to serious side effects. This section describes some of the more common side effects dextromethorphan may cause. Always tell your healthcare provider about any prescription or over-the-counter (OTC) medicines, vitamins/minerals, herbal products, and other supplements you are using. The most common side effects of dextromethorphan are listed below. Tell your healthcare provider if you have any of these side effects that bother you.
Most people who reach this plateau don’t report the experience as being positive. It can produce terrifying or uncomfortable visions that are very difficult to get out of. The only saving grace is the total lack of coordination with the body. This plateau is very intense — producing extreme states of dissociation or delirium similar to PCP. The effects last a very long time too — often exceeding several hours, with persistent effects lasting up to two weeks.