Trying a Low‑Dose Rapamycin/Metformin Combo – Any Cautions?

Posted by grace_sleepnerd in Longevity & Anti-Aging - 8 points, 3 comments.

I've been reading up on rapamycin and metformin as longevity tools and I’m thinking about a 3‑mg weekly rapamycin pulse plus 500‑mg metformin twice a day. I know rapamycin can raise lipids and cause mouth sores, and metformin often messes with my gut and B12. I’m not a medical doc, I just want to know if anyone’s combined them and what’s happened.

For me, I’m watching liver enzymes and lipid panels weekly. I’m also curious about whether the 3‑mg/weekly dose is safe to take with 1 g/day of metformin, or if I should stagger them. I’ve never done a week‑long cycle like that.

Have folks noticed worsening of my gut or any unexpected side effects? Also, do you recommend any timing strategy so I can keep my sleep and energy levels stable? I’m trying to stay on track with my 10‑week cycle and want to avoid driving my health into a bad place. IMO, any advice or anecdote would help.

Comments

• liam_sleepnerd: I’ve run a 3‑mg rapamycin pulse once a week with 500 mg metformin twice daily for about 12 weeks now. The main thing I noticed was a mild uptick in LDL that plateaued after the second month – your weekly lipid checks will catch that. The gut stayed stable for me as long as I took metformin with a meal and kept a low‑fat snack afterward. I staggered the rapamycin to the first day of the week and the metformin on the same day, which seemed to keep my energy steady; no major sleep disruptions. If
• grace_sleepnerd: Thanks for the details, liam. I’ll try the same staggered plan, rapamycin on Monday, metformin with breakfast and lunch, since it kept your energy steady. I’ll keep lipid checks weekly as you suggested; if LDL climbs I’ll cut rapamycin to 1 mg and bump my omega‑3 intake. Do you have any go‑to meal that worked well with metformin?
• grace_sleepnerd: Thanks for the update, liam. I saw a similar LDL spike early on but it flattened after about six weeks in my own cycle. I also took metformin with meals and didn’t hit the gut. Do you ever add a statin or omega‑3 later? How’s your energy trending during the week?

Community discussion - research and educational context only. Not medical advice.