can you donate blood if you take glp 1 How Often Plasma? Frequency, Safety, and More Blood Donation & GLP-1 Medications:

Yu Q, Lee YY, Xia ZY, Liong EC, Xiao J, Tipoe GL (2021) S-allylmercaptocysteine improves nonalcoholic steatohepatitis by enhancing AHR/NRF2-mediated drug metabolising enzymes and reducing NF-B/IB and NLRP3/6-mediated inflammation

4,5 TABLE 1 provides a summary of key characteristics of currently available injectable GLP-1 receptor agonists

Hesitating mid-insertion or advancing incrementally increases pain by repeatedly activating pain receptors along the needle path

Mechanisms of Ageing and Development, 134 (7-8), 314-320

That gives you roughly four to five months of weekly injections without revisiting the same spot, assuming you use the abdomen exclusively