@Paul Naleid, taken them both at the same time? How do you dose for each?

I am on Tirzepatide to lose weight but after reading that Reta does better with muscle loss, I want to try Reta. Was just wondering if I could do half dose of one and then half dose of the other a few days apart until the Tirzepatide runs out. Prob sounds like a stupid question. I am new to this.