StimulantsWhat are the types, and how does false energy end in a crash?

1What are stimulants?

Stimulants are a family of substances that share the fact that they “press the accelerator” in the brain and body together: they increase alertness, activity and heart rate, and reduce the sense of tiredness, hunger and the need for sleep.

Some members of this family are completely prohibited substances made in clandestine laboratories, such as crystal meth and Captagon; some are extracted from plants, like cocaine from coca leaves; and some are approved medicines with real medical use, like Ritalin. Amphetamine stands in the middle: it is the origin of the family, has a medicinal use in some countries, and is at the same time the active ingredient in most illicit stimulant tablets.

These substances differ in form and source, and share one effect: excess energy and heightened confidence for hours, then a drop in energy and mood. With repetition the brain learns that this energy comes only from the substance, and addiction begins.

2How do stimulants affect the brain?

Stimulants act on the brain’s reward system, raising the concentration of dopamine, linked to pleasure and motivation, and norepinephrine, linked to alertness and the “fight or flight” response. The method differs among members of the family: cocaine and Ritalin block the reuptake of these neurotransmitters so they stay longer in the synapses, while amphetamine and crystal meth push nerve cells to release them in large amounts.

Because these substances activate the sympathetic nervous system, their effect is not limited to mood; it extends to the heart, blood vessels and temperature regulation, which explains their link to heart attacks and strokes even in young people.

3Types of stimulants

Each substance in this family has a full guide and separate pages. Here is a short card for each:

4What is the difference between amphetamine-type stimulants, cocaine and pharmaceutical stimulants?

The family can be divided into three main groups. The first is amphetamine-type stimulants, which include amphetamine, crystal meth (methamphetamine) and Captagon; these are synthetic substances whose effect usually lasts for hours. The second is cocaine, a plant extract with a short action, which is why it drives the person who uses it to repeat doses close together. The third is pharmaceutical stimulants such as Ritalin, which are approved medicines for treating hyperactivity and attention deficit, but whose misuse turns them into a doorway to addiction.

The legal status mentioned is general educational material and not legal advice.

5Stimulants by the numbers

Stimulants hold a prominent place on the world drug map. According to the World Drug Report 2025 from the United Nations Office on Drugs and Crime, amphetamines and cocaine come directly after cannabis and opioids in the number of people who use them, and cocaine is the fastest-growing drug market:

The United Nations warns that a decline in Captagon production in some regions may push traffickers toward more dangerous stimulants such as methamphetamine, which makes awareness about the whole family, rather than a single substance, essential.

Sources: World Drug Report 2025 (UNODC), UN News in December 2025, and the European Monitoring Centre for Drugs and Drug Addiction paper on the Captagon market.

6Common myths about stimulants

7What dangers do stimulants share?

• High blood pressure, heart rhythm disturbance and heart attacks, even in young people.
• Strokes and seizures.
• A dangerous rise in body temperature, especially with staying up late, dancing and dehydration.
• Anxiety, panic attacks and chronic insomnia.
• Stimulant-related psychosis: suspiciousness, paranoia and hallucinations, which may be accompanied by violence.
• Weight loss, malnutrition, and deterioration of the teeth and skin with continued use.
• Severe depression after stopping, which may be accompanied by thoughts of self-harm.

The risk rises when stimulants are mixed with alcohol or other substances, or when tablets of unknown composition are used. The details differ from one substance to another, so we have dedicated separate pages to harms of crystal meth, harms of cocaine and harms of Captagon.

8Why are stimulants widespread among young people and students?

In many young people’s minds, stimulants are tied to staying up late, studying, productivity and parties. The student before exams, the driver on a long trip, someone working back-to-back shifts, and someone who wants to lose weight may all be offered a tablet that “opens up the brain”. The story often begins with Ritalin or Captagon for a practical reason, then turns into a daily need.

The risk is greater in adolescence and early adulthood, because the brain is still maturing, and because the feeling of excess confidence lowers caution and increases accidents and impulsive behavior. At parties, staying up late, dancing and dehydration increase the risk of overheating.

9What about stimulants prescribed by a doctor?

Ritalin and similar medicines are used medically to treat hyperactivity, attention deficit and narcolepsy, and under a doctor’s supervision they help many patients live better lives. The US Food and Drug Administration has updated the warnings on these medicines to draw attention to the risk of misuse and addiction, and to the importance of keeping them away from others and not sharing them.

10Is stimulant withdrawal dangerous?

Stimulant withdrawal differs from alcohol or sedative withdrawal; it mostly does not cause seizures, but comes as a crash: severe exhaustion, long sleep, hunger, depression, distress and cravings to use. The real danger is psychological, as the depression can reach suicidal thoughts, and the cravings make relapse quick without support.

You can find the full details in the pages on crystal meth withdrawal symptoms, cocaine withdrawal symptoms and amphetamine withdrawal symptoms.

11How is stimulant addiction treated?

So far there is no medication approved specifically to treat stimulant addiction, so treatment relies mainly on psychological and behavioral interventions that have proven effective, such as cognitive behavioral therapy, contingency management (positive reinforcement of abstinence), and family therapy. The doctor uses medications to treat accompanying symptoms such as insomnia, depression and psychosis when needed.

1. Step 1
   Assessment

   A medical check of the heart, blood pressure and nutrition, and a psychiatric assessment for any psychosis, depression or thoughts of self-harm.

2. Step 2
   Safe stopping

   Care during the crash phase, and monitoring of mental state and sleep.

3. Step 3
   Rehabilitation

   Cognitive behavioral, group and family therapy, and treatment of any accompanying mental health condition.

4. Step 4
   Relapse prevention

   Identifying triggers, building a healthy routine for sleep and work, and regular follow-up.

Read more in crystal meth addiction treatment, cocaine addiction treatment, amphetamine and Captagon addiction treatment and Ritalin addiction treatment. The Fund for Drug Control and Treatment of Addiction provides free, confidential treatment through hotline 16023.

12Do stimulants show up on a drug test?

Most initial screening tests include a category for amphetamines and another for cocaine. Detection windows vary by substance, sample type and pattern of use, and they are always approximate and vary by laboratory. Some medicines can give a false positive on the initial screen, so the result is confirmed with a confirmatory test. Details are in crystal meth testing and Captagon testing.

13How can the family deal with someone who uses stimulants?

1. Choose a calm time after the effect has worn off to talk, and avoid confrontation while the person is under the influence or at peak irritability.
2. Talk about your concern for their health, sleep and future, not about shame or punishment.
3. If suspiciousness, hallucinations or aggression appear, seek an urgent psychiatric assessment, and do not argue with their thoughts.
4. Watch for signs of severe depression after stopping, and do not leave them alone if they talk about harming themselves.
5. Seek specialized family counseling even if they refuse treatment at first; a trained family increases the chances they will accept it.