Rapamycin is a medication that is FDA-approved, prescription only.
Also known as Sirolimus, Rapamune, mTOR inhibitor
Rapamycin (sirolimus) blocks mTOR, a growth-signaling pathway. It is FDA-approved to prevent organ rejection, and it extends lifespan in mice, which has led some longevity clinics to prescribe it off-label at intermittent schedules.
In 1 example journal
Approved by the FDA. A licensed clinician has to decide it is right for you and prescribe it. FDA-approved prescription drug (Rapamune) for transplant and certain rare conditions. Use for aging is off-label.
As of September 23, 2026.
Key takeaways
Rapamycin blocks mTOR, a signaling hub that tells cells when to grow. Turning mTOR down promotes cellular clean-up and has extended lifespan in many animal studies.
mTOR also drives the immune response, which is why rapamycin is used to prevent organ rejection. Longevity clinics use lower, intermittent schedules hoping to get the benefits with less immune suppression, but that trade-off has not been proven in people.
Strong lifespan data in animals; in people, small trials such as PEARL (2025) mainly show short-term tolerability with limited or mixed effects on health measures.
What trials and prescribing information measured over time. Everyone responds differently.
The PEARL trial measured safety and health markers over 48 weeks. There is no human data on lifespan.
Aging researchers are interested, but reviewers say human evidence is limited and long-term safety in healthy people is unknown.
The Rapamune label has a boxed warning that immune suppression can increase susceptibility to infection and the possible development of lymphoma and other cancers.
FDA label: Rapamune (sirolimus)The label also warns about raised cholesterol and triglycerides, poor wound healing, lung inflammation, harm to a fetus and male infertility, and says to avoid live vaccines.
FDA label: Rapamune (sirolimus)The PEARL trial concluded intermittent low-dose rapamycin was relatively safe over 48 weeks in healthy aging adults, with some gains in lean mass and pain in women but no change in visceral fat.
PEARL trial: intermittent low-dose rapamycin in healthy aging adults (Aging 2025)A 2024 Lancet Healthy Longevity review of 19 studies found improvements in some immune, heart and skin markers but none in muscle or brain measures, and called for long-term studies.
Rapamycin and rapalogs for age-related outcomes in humans: systematic review (Lancet Healthy Longev 2024)Summaries of published guidelines, drug labels, regulators and reviews, each attributed to its source. DiscoverMedica does not employ clinicians.
Only a licensed clinician who knows your history can decide whether it is right for you.
These save with the compound when you add it to My Journal, so they’re on the printout for your visit.
Complete an online evaluation covering your health, infections and medications.
If a clinician thinks it may be appropriate, get baseline blood work at a local lab.
If prescribed, it ships from a licensed pharmacy.
Continue periodic labs and check-ins while you take it.
Some services let you order common lab tests yourself, so the results are ready for your visit. Your clinician decides which labs, if any, you need, and what the results mean.
From each service’s own site, checked September 23, 2026.
From each provider’s own site, checked September 23, 2026. Programs change, so confirm the details before you sign up.
4 providers list Rapamycin on DiscoverMedica, lowest listed price first.
† Prices as listed by the provider when we checked; they change.
Listed prices run from $64 to $65 a month across 2 providers, as checked October 7, 2026.
Prices as listed by the provider when we checked; they change. Membership or consult fees may be separate; see each provider.
That is unknown. It extends lifespan in mice. Human studies so far are small, short and measure health markers, not lifespan.
The idea is that lower, intermittent use suppresses the immune system less. Early trials like PEARL looked reasonably safe over a year, but long-term safety is not established.
Programs require baseline and ongoing blood work. Ask your prescriber exactly which tests and how often.
Yes. A few longevity-focused telehealth providers prescribe it off-label after an evaluation and labs.
This is not a complete list of risks. Read the full prescribing information and any Medication Guide, and talk to a licensed clinician or pharmacist about your own situation. If you have a severe reaction, call 911. You can report side effects to the FDA through MedWatch at 1-800-FDA-1088.
Guide reviewed September 23, 2026.
Educational information only, not medical advice. It does not replace a conversation with a licensed clinician.
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