These anecdotal reports have appeared in patient forums, social media discussions, and clinical practice observations
On 21 May 2026 , Lilly published the long-awaited topline results from the TRIUMPH-1 Phase 3 trial, and the data is striking: participants on the highest dose lost an average of 28.3% of their body weight at 80 weeks , with 45.3% of patients losing 30% or more a threshold previously only achievable with bariatric surgery
Now these things may change
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Witte AB, Gryback P, Holst JJ et al (2009) Differential effect of PYY1-36 and PYY3-36 on gastric emptying in man
The ones most likely to increase health risks or cause other issues when taking tirzepatide include: Insulin or sulfonylureas, since taking these with tirzepatide can increase risk of hypoglycemia (low blood sugar) Blood thinners like warfarin, which may not get absorbed as well on tirzepatide Oral contraceptives, since tirzepatide can make those less effective (because of that, experts recommend using other birth control methods when taking either Mounjaro or Zepbound) Tirzepatide cost and coupons Mounjaro's retail price is $1,069.08 for a one-month supply, and Zepbound costs $1,086.37 per month, according to the manufacturer