Clenbuterol is a drug that opens the airways. It is approved in the United States only for use in horses, for a breathing problem called airway obstruction. It is not approved for use in humans in the United States, and it is not approved for weight loss or for building muscle. Do not buy clenbuterol for human use.
Can Clenbuterol be classified as a steroid?
Clenbuterol is not a steroid. It is a stimulant that acts on adrenergic receptors, also known as beta-2 receptors, in different tissues in the body. WADA lists it as a prohibited anabolic agent on the Prohibited List under S1.
What Is Clenbuterol?
Clenbuterol is a drug that opens the airways. In the United States, the US Food and Drug Administration (FDA) has approved it only for use in horses, for a breathing problem called airway obstruction. It is sold under the brand name Ventipulmin. It is not approved for use in humans in the United States, and it is not approved to treat asthma in people here. There is no human medicine that you can legally buy as clenbuterol in the United States.
Is Clenbuterol Safe?
Clenbuterol is not safe for people to use for weight loss or for building muscle. No safe dose has been set for people. Its side effects include a fast or irregular heartbeat, chest pain, shaking or tremors, anxiety, headaches, low potassium, and heart attack. Products sold online or from an unlicensed source can contain more than the label states, or other harmful ingredients.
Dosage Claims Are Not Safe
Clenbuterol is not approved for use in humans in the United States, so there is no safe dose or cycle for people. Some online sources claim that a “low” dose, a “women-only” dose, or a “2 weeks on, 2 weeks off” cycle is safe. These claims are wrong. Any dose of clenbuterol carries a risk, because no safe dose has been set for people. This guide does not list doses, because no dose is safe for people.
Clenbuterol Is Banned in Sport
Clenbuterol is prohibited in sport. It is on the World Anti-Doping Agency (WADA) Prohibited List under “S1. Anabolic Agents,” and is not allowed at any time. Detection in a drug test can result in a doping sanction, even if the athlete did not get any benefit. Athletes who tested positive for clenbuterol have been banned after eating meat from Mexico that had clenbuterol in it. WADA and the US Anti-Doping Agency (USADA) warn athletes to be very careful about meat from countries where clenbuterol is used in farmed animals.
Where to buy Clenbuterol?
Do not buy clenbuterol for human use. There is no clenbuterol product that is legal in the United States for human use, in any form. If a product sold in the United States calls itself clenbuterol, it is sold illegally. There is no real dose, no safe dose, and no use in humans that is an approved use in the United States.
What to Do Instead
If you want to lose weight, do not use a drug to burn fat. Safe weight loss means 1 to 2 pounds a week. Eat fewer calories and get regular physical activity, including 150 minutes of moderate-intensity activity each week, plus 2 days of strength training. Talk to your doctor about your options and risks first. Plan your meals and exercise, get enough rest, and ask for help from people who care about you.
If you are worried about alcohol, pills, or other drugs, you can get immediate help. You can call emergency services at 911 or the Poison Control helpline at 1-800-222-1222.
Safe Weight Loss: What Works
Weight loss depends on eating fewer calories than your body uses, along with regular physical activity. Safe weight loss means 1 to 2 pounds a week. Crash diets or risky methods should be avoided. The CDC recommends adults get 150 minutes of moderate-intensity physical activity each week, as part of a plan that also includes strength training on two days. The safe ways to lose weight include building a healthy diet, being physically active, getting enough sleep, and talking to a doctor about a plan that fits you.
Frequently Asked Questions (FAQs)
Is clenbuterol legal for people in the United States?
Clenbuterol is not approved for use in humans in the United States. The FDA has approved it only for use in horses. There is no legal clenbuterol product for human use in the United States.
Is clenbuterol a steroid?
No, clenbuterol is not a steroid. It is a stimulant that acts on beta-2 adrenergic receptors. WADA lists it under “S1. Anabolic Agents” on the Prohibited List.
Is clenbuterol banned in sport?
Yes. It is on the World Anti-Doping Agency Prohibited List and is prohibited at all times. Detection in a drug test can result in a doping sanction.
What should I do if I have taken clenbuterol or if I am thinking of using it?
Talk to your doctor. If you notice a fast or irregular heartbeat, the shakes or tremors, anxiety, or chest pain, seek medical advice promptly. If you are worried about alcohol, pills, or other drugs, you can call the Poison Control helpline at 1-800-222-1222.
What is a safe way to lose weight?
Safe weight loss means 1 to 2 pounds a week. Talk to your doctor about a plan that fits you and your lifestyle. Eat a healthy diet, be physically active, and get enough sleep.
Disclaimer: This is general information only and is not medical advice for any one person. Clenbuterol is not approved for use in humans in the United States. Its side effects can be dangerous. Talk to a doctor before using any drug or supplement.
Last Updated: 6 November 2026