higher doses flipped my mood hard. was partly the food quality and not moving enough to keep muscle though. also realized i was eating feelings, you know? on this stuff you can't do that so you sit with it. not ready for meds or therapy but journaling and diet and movement helped tons.
Gabapentin is one of the medications with a fairly well-documented weight gain side effect - it affects GABA pathways in ways that slow metabolism and increase appetite for some people. 13 lbs on GLP-1 against Gabapentin is actually meaningful progress given that counter-pressure.
110 lbs gone, HTN meds stopped, cholesterol meds stopped, 15 inches from the waist - that's the whole picture of what this can do. 50 lbs in the OP and still young means the runway ahead is long and the improvements compound. Keep going.