Stimulants and alcohol should not be mixed. Stimulants are a group of drugs that increase the central nervous system’s activity. Alcohol is a depressant that slows down the central nervous system. If stimulants and alcohol are mixed, a number of risks can arise.
In recent years, the use of both prescription and illicit stimulants has risen in the US [1]. The drugs are commonly taken in party settings, and so there’s a high likelihood that people are mixing them with alcohol.
Stimulants are addictive when misused. Alcohol is highly addictive. Knowing why the two shouldn’t mix not only prevents serious physical harm, but it can protect people who have a substance use disorder or who are vulnerable to addiction.
What Are Stimulants?
Stimulants are psychoactive drugs that speed up messages sent between the brain and the body. They’re sometimes called ‘uppers’ because they can make people feel more awake, alert, or confident. Stimulants can be legal or illegal depending on the specific drug.
Doctors may prescribe stimulants to treat Attention Deficit Hyperactivity Disorder (ADHD), narcolepsy, and obesity. Legal stimulants include Adderall and Ritalin. Caffeine is also a stimulant and is the most commonly consumed stimulant in the US [2].
Illegal stimulants include cocaine and methamphetamine. People may take these stimulants recreationally to improve concentration or to feel high.
In recent years, prescriptions for stimulants have increased, and stimulant misuse has increased correspondingly, especially among young people [3]. Misuse is when someone takes stimulants without a prescription, uses prescription drugs in ways other than recommended by a doctor, or mixes stimulants with other substances (including alcohol).
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What Effects Do Stimulants Have?
Generally, stimulants increase brain activity, energy, heart rate, and focus. The specific effects vary depending on the stimulant:
Adderall
Adderall is a prescription drug that contains dextroamphetamine and amphetamine. It’s used to treat ADHD and narcolepsy and works by increasing dopamine and norepinephrine levels in the brain. When taken as stated by a physician, Adderall causes alertness and improves focus. It can also create a feeling of calm, which, in people with ADHD, adversely makes them feel tired.
Possible side effects of Adderall include:
- Stomachache
- Anxiety
- Headaches
- Dry mouth
- Seizures
- Hallucinations
- Stroke
- Heart attack
Ritalin
Ritalin is the brand name for methylphenidate, a prescription drug used to treat Attention Deficit Disorder (ADD), ADHD, and narcolepsy. It helps to improve focus and reduce impulsive behaviors. Ritalin can make it easier for a person to listen, fidget less, and control their actions.
Possible side effects include:
- Headache
- Difficulty sleeping
- Racing heart
- Nervousness
- Shakiness
- Mood changes
- Delusion
- Seizures
Caffeine
Caffeine is a natural stimulant found in plants and most commonly consumed through coffee and tea. It belongs to a class of drugs called methylxanthine and it can boost people’s energy. It’s also part of medications to reduce drowsiness, headaches, and migraines.
Overconsuming caffeine can lead to withdrawal symptoms when intake is suddenly stopped or reduced. Other side effects include:
- Anxiety
- Irritability
- Drowsiness
- Headaches
- Tremors
- Confusion
- Upset stomach
- Fast heartbeat
Cocaine
Cocaine is an illegal stimulant made from coca leaves. It’s a white powder that can be snorted or rubbed on gums. Cocaine increases dopamine in the brain’s reward centers, creating a ‘high’ that makes people feel more confident and alert. Cocaine is the third most consumed drug in the US [4].
Cocaine is addictive, and many people experience a ‘come down’ after use, during which they feel emotionally low, tired, and physically uncomfortable. Side effects also include:
- Fast or irregular heartbeat
- Headache
- Nausea
- Insomnia
- Diarrhea
- Nosebleeds
- Erectile dysfunction
- Tremors
Methamphetamine
Methamphetamine, also known as meth, is an illegal stimulant that comes in pill form or as a white-colored powder. Meth is the second most widely consumed drug in the US [4].
It’s very potent, even in small doses, and produces an intense short-term high that can precede severe withdrawal. Meth users often consume the stimulant for days before ‘crashing.’
Side effects of methamphetamine include:
- Racing/irregular heartbeat
- Lack of social awareness
- Weight loss
- Insomnia
- Delusion
- Hallucinations
- Paranoia
- Kidney/liver failure
Can I Mix Stimulants And Alcohol?
No, stimulants and alcohol should not be mixed. Even if stimulants are legal and prescribed by a physician, it’s not recommended to take them with alcohol.
Stimulants speed up the nervous system, while alcohol is a depressant that slows it down so the two substances have opposing effects. Rather than cancel each other out, taking stimulants and alcohol together can heighten the effects of both. The result is a higher risk of adverse symptoms and overdose.
Alcohol can also mask the effects of stimulants, so the sensation of being ‘high’ may feel dulled. People may consequently consume more and risk greater harm or overdose.
Possible serious and life-threatening consequences of mixing stimulants and alcohol include:
- Irregular heartbeat
- Respiratory distress
- Dehydration
- Impaired judgment
- Hyperthermia
- Organ failure
- Seizures
- Coma
- Heart attack
- Stroke
Research shows that mixing stimulants such as methamphetamine and alcohol may increase the risk of developing alcohol use disorder [5]. Another study highlights the potential to increase the risk of developing different types of cancer [6].
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Are Stimulants Addictive?
Stimulants are highly addictive. The risk of addiction, however, varies depending on whether the drug is prescribed or illicit; the dose; the frequency of use; and if another Substance Use Disorder is present.
People who have an alcohol dependency are more likely to abuse stimulants [7]. People who already have a mental health disorder are also at greater risk of becoming addicted to stimulants [8].
Sources
[1] Centers For Disease Control And Prevention. (August 2025). Drug Overdose Deaths Involving Stimulants ― United States, January 2018–June 2024. CDC.gov.
[2] Farzam, K. et al. (July 2023). Stimulants. StatPearls. National Library of Medicine.
[3] National Institute on Drug Abuse. (April 2023). School prevalence of stimulant therapy for ADHD associated with higher rates of prescription stimulant misuse among teens. nida.nih.gov.
[4] Centers For Disease Control And Prevention. (March 2026). Most Common Drugs in U.S. Overdose Deaths: 2017–2023. blogs.cdc.gov.
[5] Stafford, A. et al. (December 2022). Combined and sequential effects of alcohol and methamphetamine in animal models. Neuroscience and BioBehavioral Reviews.
[6] Althobaiti, Y. Sari, Y. (July 2016). Alcohol Interactions with Psychostimulants: An Overview of Animal and Human Studies. Journal of Addiction Therapy and Research.
[7] Moss, H. et al. (November 2016). Patterns of Use of Other Drugs Among Those with Alcohol Dependence: Associations with Drinking behavior and Psychopathology. Addictive Behaviors.
[8] Marel, C. et al. (January 2019). Conditional probabilities of substance use disorders and associated risk factors: Progression from first use to use disorder on alcohol, cannabis, stimulants, sedatives and opioids. Drug and Alcohol Dependence.
