Short answer: SARMs (selective androgen receptor modulators) are experimental drugs designed to build muscle with fewer side effects than steroids. None is FDA-approved, and they cannot legally be sold as dietary supplements, yet they are widely marketed as 'research chemicals'. They have been linked to liver injury, heart attack and stroke risk, and suppressed testosterone.
Key takeaways
- What it is: SARMs is an unapproved investigational drugs and not a federally controlled substance.
- Medical use: None approved.
- Timing: effects start in weeks (for effects on muscle) and last daily oral dosing.
- Most dangerous mix: Alcohol and acetaminophen in high doses, which can cause more liver damage (oral steroids).
- Naloxone: it does not reverse this drug, but give it whenever opioids could be involved.
- Dependence risk: Moderate.
- Legal route: SARMs is not federally scheduled as of October 2026, but state bans, FDA restrictions, and pending federal action can apply; check current status.
What is SARMs?
SARMs were developed for muscle wasting, osteoporosis, and other conditions. None has been approved by the FDA.
Users report gains in muscle and strength. Like steroids, SARMs suppress the body's own testosterone and sperm production and lower HDL cholesterol.
Quick facts
| Fact | SARMs |
|---|---|
| Examples | Ostarine (enobosarm, MK-2866), ligandrol (LGD-4033), testolone (RAD-140), andarine (S4) |
| Often grouped with (not SARMs) | Cardarine (GW501516), ibutamoren (MK-677) |
| Drug class | Investigational androgen receptor ligands |
| US legal status | Not controlled; unapproved drugs; illegal in dietary supplements |
| Forms | Liquids, capsules sold 'for research only' |
| Sport | Prohibited by WADA at all times |
How long does SARMs last?
- Starts working: Weeks (for effects on muscle)
- Effects last: Daily oral dosing
Timing varies with the dose, the form, how it is taken, liver and kidney function, age, and other drugs taken at the same time.
What are the biggest risks of SARMs?
Liver injury: multiple case reports of drug-induced liver injury, including jaundice requiring hospital care.
Heart: lowered HDL cholesterol and possible increased risk of heart attack and stroke.
Hormones: suppressed testosterone, low sperm count, and, in women, masculinizing effects.
What should you never mix with SARMs?
| Combined with | What happens | Guidance |
|---|---|---|
| Warfarin and other blood thinners | Increased bleeding risk | Monitor closely |
| Insulin and diabetes medicines | Lower blood sugar | Monitor |
| Other steroids and stimulants | Heart and liver strain | High risk |
| Alcohol and acetaminophen in high doses | More liver damage (oral steroids) | Avoid |
Check any combination with the DoseUses combination checker or ask a pharmacist.
What are the signs of a SARMs overdose, and what should you do?
SARMs do not usually cause acute overdose. Seek care for yellowing skin or eyes, dark urine, abdominal pain, chest pain, or signs of stroke.
When to get emergency help
- Call 911 for chest pain, shortness of breath, sudden weakness or numbness on one side, trouble speaking, or a severe headache.
- Seek urgent care for yellow skin or eyes, dark urine, severe abdominal pain, or a painful, swollen leg.
- Seek care for a hot, painful, or swollen injection site, which may be an infection.
- If you have thoughts of harming yourself, call or text 988.
What happens when someone stops anabolic steroids?
After a cycle, the body's own testosterone production is suppressed and can take weeks to months to recover. Many users develop dependence on steroids.
- Weeks 1 to 4Low testosteroneFatigue, low sex drive, erectile problems, and low mood.
- Months 1 to 3RecoveryDepression, which can be severe, and muscle loss; hormone levels slowly recover.
- Months to a year or moreLasting effectsSome people have long-term low testosterone or infertility.
See the withdrawal timelines and the full SARMs withdrawal guide.
Is SARMs legal?
SARMs are not federally controlled substances, but they are unapproved drugs. The FDA says they cannot lawfully be marketed as dietary supplements, and selling them for human use is illegal.
- Research chemical labels: labels saying 'for research only' do not make sales for human use legal.
- Pending legislation: bills to add SARMs to the Controlled Substances Act have been introduced in Congress but not enacted.
- Military and sport: SARMs are prohibited by WADA and by the US military.
Outside the United States
| Country | Status |
|---|---|
| Australia | Prescription-only (Schedule 4); importing without a prescription is illegal |
| United Kingdom | Unlicensed medicines; supply restricted |
| International | Not under UN control; prohibited in sport by WADA |
Frequently asked questions about SARMs
Are SARMs steroids?
No, chemically, but they act on the same androgen receptors and share many risks.
Are SARMs legal?
They are not controlled substances, but they are unapproved drugs and cannot legally be sold for human use or as supplements.
Are SARMs safer than steroids?
This has not been shown. They have caused liver injury and suppress testosterone.
Do SARMs show up on drug tests?
Yes, in sport testing. They are banned by WADA.
Is MK-677 a SARM?
No. Ibutamoren (MK-677) is a growth hormone secretagogue, though it is often sold with SARMs.
Sources
- Certain bodybuilding products put consumers at risk for heart attack, stroke, serious liver damage and more, US Food and Drug Administration.
- Chemical Identification and Labeling of Substances Marketed as Selective Androgen Receptor Modulators and Sold via the Internet, JAMA, 2017.
- Anabolic Steroids, National Institute on Drug Abuse.
- National Helpline, Substance Abuse and Mental Health Services Administration.
- FindTreatment.gov, Substance Abuse and Mental Health Services Administration.
- International drug control conventions, United Nations Office on Drugs and Crime.
This guide summarizes the sourced DoseUses SARMs profile, written from FDA labels, DEA rules, and federal health agencies. It is educational and is not medical advice. Last updated October 5, 2026.
