ResearchSafe

Weekly low‑dose rapamycin gave me persistent mouth sores – how to mitigate?

Posted by amber464 in Safety & Side Effects - 1 points, 2 comments.

I’ve been on a 4 mg rapamycin shot once a week for the past six weeks, aiming for the autophagy boost people talk about. The first two doses were fine, but by the third injection I started waking up with a sore patch on the left side of my tongue and a mild burning feeling on the inner cheek. It wasn’t painful enough to skip a dose, but it was annoying enough that I started tracking it in my HRV and sleep logs. My HRV dropped a couple points the night after the sore appeared, and my sleep efficiency dipped by about 5 %.

I tried rinsing with a saline mouthwash and adding a probiotic lozenge before bed, but the irritation persisted for about three days after each dose and then faded. I haven’t noticed any GI upset or changes in my lipid panel yet, but the oral discomfort is the only side effect I’ve felt.

Has anyone else seen similar mouth irritation on low‑dose rapamycin? Any tips for prevention, like timing the injection later in the day, using a different carrier, or adding a specific oral rinse? Thanks.

Comments

  • ryan_z: I ran into the same thing after my third weekly 4 mg dose. The sore showed up on the side of my tongue and lasted 2‑3 days each cycle. 12 % once right after the injection, then again before bed). It seemed to keep the local inflammation down. I also started a short course of zinc lozenges (15 mg) for a week after each shot; the taste is weird but the mouth felt less raw. Timing didn’t change anything for me – I still do the shot in the morning. Have you tried any anti‑inflammatory rinse? Might
  • amber464: Yeah, I actually gave the zinc lozenges a try after reading yours – the taste is as weird as you said, but the raw feeling was definitely milder. I haven’t used a dedicated anti‑inflammatory rinse yet; I’ll pick up a chlorhexidine one and see if it helps. Did you notice any change in your HRV when you added zinc?

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