People feel inebriated, speech becomes slurred, and inhibition increases. There’s a general range of doses we can give for each plateau, but it’s much better to find your individual plateau based on your body weight. The effects of DXM change dramatically depending on the dose, so it’s important to be very accurate and aim for a specific plateau.
- Recognizing these symptoms early is crucial for timely intervention and treatment.
- Tell your healthcare provider if you are breastfeeding or plan to breastfeed.
- Never combine DXM with other serotonergic drugs and antihistamines, as these combinations can result in serotonin syndrome.
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- If you are taking dextromethorphan oral liquid or extended-release oral suspension, use an accurate measuring device to measure your dose, such as a dosing cup provided with the medicine.
- Tell your healthcare provider if you have any of the following.
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The FDA approved dextromethorphan for over-the-counter sale as a cough suppressant in 1958. Codeine phosphate syrup is still available in small doses without a prescription in some states, but requires a signature and ID to purchase, similar to pseudoephedrine. As with most cough suppressants, studies show that dextromethorphan’s effectiveness is highly debatable, especially in children. When used at the dosage printed on the product label, dextromethorphan (DXM) is a fairly safe drug intended to reduce coughing. Although there is controversy about its effectiveness as a cough suppressant, the effects of DXM at high doses are well documented. At high doses, DXM can produce psychedelic symptoms including mania, panic, extreme agitation, and hallucinations.
Check nonprescription cough and cold product labels carefully before using 2 or more products at the same time. These products may contain the same active ingredient(s) and taking them together could cause you to receive an overdose. This is especially important if you will be giving cough and cold medications to a child. DXM is the main active ingredient found in nearly 90% of over-the-counter cough and cold medicines. Initially, DXM was developed and researched as an alternative to codeine, an opioid cough suppressant. In contrast to codeine, DXM provides effective cough suppression without analgesia, strong sedation, and respiratory depression.
What Are The Serious Side Effects Of Dextromethorphan?
If you stop taking it, you’ll begin to experience the effects of withdrawal, which can only be alleviated by using more DXM. Powerful dissociative states take over, which can make it difficult to tell the difference between what’s real and what’s a hallucination. The experience is frequently described as “terrifying.” Some people report lasting negative effects after taking doses this high — which is also common with PCP. This medication is sometimes prescribed for other uses; ask your doctor or pharmacist for more information.
“Crystal Dex:” Free-base Dextromethorphan
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.

What Are The Long-Term Health Effects Of DXM Addiction?
DXM causes different stages (often referred to as plateaus) that vary with dosage. DXM also has mild serotonin and norepinephrine reuptake inhibitors — which means it can increase the concentrations of serotonin and norepinephrine in the brain. This effect explains the euphoric effects of DXM, especially in the 1st and 2nd plateau of effects. Its therapeutic purpose — cough suppression — works by reducing the cough reflex in the brain.
Withdrawal
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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.

Healthcare professionals may recommend dextromethorphan for adults and some children. If a person experiences serious side effects after misusing DXM, they should seek emergency medical help. It is possible to treat DXM overdoses successfully with supportive care.

Parental involvement and family therapy are crucial in supporting a teen’s recovery process. Organizations like SAMHSA offer valuable information and support for families dealing with teen addiction. Approach your loved one with empathy and express your concerns without judgment.
Combining DXM With Other Drugs

Also a very common question is “what age do I have to be to do this drug”… I can’t give you that info but legally (in the US at least) you have to be 18 to buy this from a pharmacy whether ur tripping or have a common cold… If you know the opioids are out of your system you should be fine (be safe and be extra sure, always take a day or 2 buffer to make sure) but just never combine them.
There are more specific symptoms and dangers on the TripSit wiki but basically you can seriously end up in an ER. I want to cover the prescription drug interactions first as I want to seriously catch anyone at risk before they put themselves in a harmful situation. Taking it after the expiry date may lead to serious side effects. Therefore, before taking any medicine, please check the expiry date, which is printed on the back of the pack, or consult with your pharmacist or doctor in case of any doubts. Since cough medicines are taken only if required, you will not be on a dosing schedule. But if you are taking it regularly, take the missed dose as soon as you remember.
What Should Not Be Mixed With Dextromethorphan?
Laboratory tests involve analyzing biological samples to diagnose conditions or measure substance levels in the body. Laboratory tests may be ordered to detect the presence of DXM or other substances in the body. These tests can include blood tests, urine tests, and liver function tests. Laboratory tests help confirm the diagnosis and provide information on the extent of substance use and its impact on the body. Long-term brain changes refer to enduring alterations in brain structure and function caused by prolonged substance abuse or chronic conditions. Prolonged use of DXM leads to significant changes in brain structure and function.
Both of these substances are Central Nervous System depressants which means these two decrease the activity of the neurons in the brain. Another quite fascinating aspect relating to Dextromethorphan is information about its metabolism. Whereas the same dose in a poor metabolizer will have oral availability of 80% causing effects for up to 19 hours.