Analysis Version
v1
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mechanistic
Analysis v1
Supported

Taking rapamycin, even in small doses now and then, might increase the chance of getting serious infections like pneumonia in older people because it can weaken the immune system.

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Pro
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Against

Evidence from Studies

Supporting (1)

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Community contributions welcome

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Exercise and Weekly Sirolimus (Rapamycin) in Older Adults: RAPA‐EX‐01 Randomised, Double‐Blind, Placebo‐Controlled Trial

Randomized Controlled Trial
Human
2026 Apr

The study gave older adults a weekly dose of rapamycin and found one case of pneumonia that might be linked to the drug, which supports the idea that even low doses could increase infection risk.

Contradicting (2)

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Community contributions welcome

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Influence of rapamycin on safety and healthspan metrics after one year: PEARL trial results

Randomized Controlled Trial
Human
2025 Apr 4

The study looked at low-dose rapamycin in older adults and found no more serious side effects, including infections, than in people taking a placebo.

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Effect of Low-Dose Rapamycin on Senescence Markers and Physical Functioning in Older Adults with Coronary Artery Disease: Results of a Pilot Study.

Cross-Sectional Study
Human
2016

The study looked at low-dose rapamycin in older adults but didn’t track infections, so we can’t tell if it increases infection risk or not.

Gold Standard Evidence Needed

According to GRADE and EBM methodology, here is what ideal scientific evidence would look like to definitively prove or disprove this specific claim, ordered from strongest to weakest evidence.

Similar Assertions

Scientists have tested rapamycin in older people, but only to see if it helps the immune system fight infections. These studies look good, but they don't prove that rapamycin can help people live longer or healthier lives.

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Scientists gave mice a drug called rapamycin when they were middle-aged (around 270 days old) and found that both male and female mice lived longer compared to mice that didn't get the drug.

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Taking rapamycin once a week for a year might be safe for healthy older adults, with no more side effects than a sugar pill — so it could be a candidate for slowing normal aging.

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Taking a low weekly dose of a drug called rapamycin for a year might make older adults feel healthier overall, based on their own reports.

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Scientists are trying different ways to reduce the bad side effects of a drug called rapamycin—like giving lower doses, combining it with other medicines, or taking breaks between doses—and recent findings suggest that taking breaks might help keep the good effects while reducing the bad ones.

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