That's exactly why keeping protein intake up and staying active in some form matters so much. Get the steps in however works, right from the start. Muscle comes off way easier on this medication than it goes back on. Currently pretty petite myself. Was aiming to hold at a slightly higher number but kept dropping regardless. Still try to hit a solid daily step count and work out at least a few times weekly, mostly core-focused. Have a bike and an elliptical at home. Nearly fifty and started this for type 2 diabetes. Been on it well over a year and sat steady at one number for months before suddenly dropping fast out of nowhere this month. Skin loses elasticity as we age, guess that's just part of it. But spacing injections out further could be worth trying, or cutting back the amount if that doesn't help, always with a doctor's guidance of course. Good luck.