Therapeutic doses usually arrive around week 12, so you've only been at one for about 4 weeks. 12 pounds in 4 months is a perfectly healthy rate. You didn't gain it overnight, and it won't come off overnight either. Many of the insane 'I lost 50 pounds in 1 month' posts come from very obese people. I lost much faster when obese than when overweight, since higher weight means higher TDEE. For scale, 50 lbs off a 500 lb person equals about 15 off someone at 200. I shed roughly 100 lbs in eighteen months on these meds, while tracking calories, weighing my food, following a heavy lifting protocol and getting around 10k brisk inclined steps daily. I am now 3 years in. Hitting the gym 4x could mean many things: around half the folks at my gym walk gradually on a level treadmill for half an hour.