can i take tirzepatide and semaglutide at the same time Switching Between Tirzepatide: Efficacy, Dosing Protocols, and What to Expect Is Tirzepatide Better Than Semaglutide?

There's no instruction that says "wait 30 minutes after caffeine" in the same way you'd see with, say, a thyroid medication

[42] Subsequent analyses have clarified that this early worsening of pre-existing retinopathy is a secondary effect caused by the rapid and robust drop in blood glucose levels, rather than a direct toxic effect of semaglutide on the eyes

Weight loss, increased exercise, and improved sleep produce further reductions over 2-3 months

10.1038/s41440-019-0234-6 [EL 1

How will being on medication reduce the quantity I am eating

These might suit you better if you prefer swallowing tablets over using injectable pens