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What to Expect

What side effects should I expect from tesamorelin?

Updated 2026-05-05

The most common side effects on tesamorelin are joint pain, swelling in your hands or ankles, and injection-site redness. In the Egrifta SV trials, about 11% of patients had fluid retention symptoms and about 6% had joint pain. Some people also see blood sugar creep up - tesamorelin can push you toward pre-diabetes if you already have insulin resistance. Most symptoms peak in weeks 2-4 and ease by week 8 if the dose stays steady.

IfIf your joints ache or feel stiff
Thenthen drop the dose by a third for two weeks and reassess - this is the most common reason people quit
IfIf your fingers tingle or wrists hurt
Thenthen this is carpal-tunnel-type fluid pressure - lower the dose or take a week off
IfIf you have pre-diabetes or diabetes
Thenthen check your fasting glucose monthly while on tesamorelin - it can worsen blood sugar control
IfIf you have a history of cancer
Thenthen do not use tesamorelin - the prescribing label contraindicates active cancer because it raises IGF-1
Key facts
  • Tesamorelin works by increasing your own growth hormone, which raises IGF-1 - that drives most of the side effects
  • Egrifta SV trial data: arthralgia (joint pain) ~6%, peripheral edema ~5%, injection-site reactions ~25%
  • About 47% of trial patients had IGF-1 levels >2 SDS at week 26 - elevated IGF-1 is the main biomarker to track
  • Glucose intolerance odds ratio in trials was 3.3 vs placebo at week 26
  • The published prescribing label requires monitoring IGF-1 and glucose during treatment
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