The exception: people coming from tirzepatide or semaglutide If you have been on semaglutide or tirzepatide and are transitioning to retatrutide, your body already has significant adaptation to GLP-1 and possibly GIP receptor activation
Bernardo ME et al
Mice lacking TLR2, TLR4, or MYD88 show reduced infarcted regions in response to cardiac as well as cerebral ischemic-reperfusion injury
The semaglutide itself is unchanged
Tirzepatide titrates from 2.5 mg up to 15 mg weekly, which means higher concentrations are needed to keep injection volumes manageable
The results showed that for this treatment, compared to the injection of RSV alone, the C max in the heart, liver and other organs was greater, the T max was shorter, and the bioavailability was increased (Wu et al., 2020)