First time stacking help

The claim about the freezer being bad is not true. Powder that has not been mixed can go in the freezer, the fridge, or even a cool basement. I have never stacked myself, only read about it. If it were me I would drop the tirz by a milligram first and bring reta in gradually, maybe on the off days so the appetite control overlaps. There are more threads here if you search the site.

Keep the dry powder in the freezer. Switch off days between the two shots. I do 5 mg reta then four days later 5 mg tirz.

I combine 10 mg tirz with 4 mg reta. Since I had already used semaglutide before tirz, my system was used to GLP-1s. I began reta at 2 mg and stepped up to 4 mg. Tirz goes in on Thursday, reta on Monday. So far the results are solid.

Started at 8 mg tirz when I added reta. First week was 8 mg tirz Monday and 0.5 mg reta Friday. Next week dropped to 7 mg tirz and raised reta to 1 mg on Friday. Every two weeks I increased reta and lowered tirz until I landed at 4 mg of each. Now I run 5 and 5.

It depends why you want to add it. I assume you still have weight to lose and are deciding whether to switch or layer it onto the 15 mg tirz. Details like starting weight, goal, current weight, age, height, time on tirz, side effects, and why not just raise the tirz dose would help. I added 5 mg reta to my 15 mg tirz and combine them in one syringe because I am trying to hold onto a 54 percent loss; for long-term severe obesity the higher combined doses seem reasonable even without much safety data yet.

Only a month into tirz at the lowest 2.5 mg dose and I added 1 mg reta three days after the tirz shot to get the best of both. The day after the reta dose the food thoughts dropped hard and I felt more energetic than on tirz by itself. Might drop the reta to 0.5 mg depending how the rest of the week goes, but so far it beats tirz alone.

Ease into reta slowly and, as others said, lower the tirz a little so you are not taking more than needed. Separate the injection days unless you like doing both at once. On the storage point, dry powder of any of these benefits from the freezer for longer life, but once mixed the rules change. Tirz can handle freezing and thawing with little loss, yet reta is more delicate and does not tolerate freeze cycles after mixing.

Someone else used the term cross stacking and it fits. I would lower tirz while slowly raising reta. I am in maintenance now at 4 mg tirz for appetite control and 8 mg reta for the fat-burning effect. Earlier I went up to 12 mg reta while holding tirz at 5 mg until the weight came off. It worked well for me; I dropped 112 lb and 46 percent of my body weight in eleven months. How fast to adjust the doses is individual and takes trial and error. My only mistake was jumping from 2 mg to 3 mg reta in one week and dealing with a week of diarrhea, so after that I moved slower.

What you saw was probably about freezing the mixed version. Reta does not hold up as well as tirz when the vial has already been reconstituted, so avoid freezing it after mixing. Dry powder vials do best in the freezer though. On the stacking question, have you thought about going past 15 mg tirz first? I am at 18 mg now and others go higher; Lilly is testing even larger doses. Instead of stacking reta I tried sema first and liked it, then added cagri this week and it has been exactly what I needed.

Eight months on tirz, now at 3.75 mg every six days. Food noise is returning so I am thinking of adding 1 mg reta on day three and eventually moving away from tirz. I will watch how I feel, maybe raise reta by 0.5 mg each week and slowly cut tirz after a few weeks, then adjust the plan based on my response.

If food noise returns toward the end of each week that is likely why the scale has stalled or crept back up. Switching to reta can help overall loss but it is not as strong on appetite control, so once-weekly shots might make the ups and downs worse. Whether you switch or stay, splitting the doses is probably the most useful step to flatten the food-noise swings.