Moving from 12.5 mg down to 10 mg explains the extra hunger. Whether you split the prescription or rely on grey stock is a personal call since both are tirzepatide. You may feel safer with the prescription or doubt the grey version's strength. Clarifying your actual target will shape the next steps on dose and any reta addition. Right now the messages show hesitation. It could help to pause and decide if the aim is still that last 10 lb or if current weight is fine. Setting clear checkpoints, like adding reta only if a certain amount isn't lost by a set date, would give direction. These adjustments take weeks to show effects, so having a settled plan matters.
I've stayed on 12.5 mg roughly a year with a valid script. Insurance problems left me using up stored doses and I also obtained some grey product as backup. Weight has held steady beyond half a year and I'm content even though another 10 lb drop would be nice. After two and a half years on GLP-1 meds I'm back near my college weight. Cardio sessions leave me drained. I'm considering moving to 7.5 mg or even 5 mg long term. I started a grey 10 mg shot last Wednesday to stretch my prescription supply. Hunger feels a bit stronger than usual and I'm noticing meal times more. I'll hold at 10 mg for a while, maybe months, and split future prescription doses. Adding a 1 mg reta dose mid-week is another idea I'm weighing.