Rapid weight gain. not pregnant. drinking a lot of coffee not eating a lot. not really exercising could it be from coffee or medicine? was 130 now 140

Possibly: Many "coffee" drinks contain an enormous amount of sugar and calories. There are many potential causes including a medical condition such as a thyroid problem, a problem with fluid retention, and other medical problems; or your calorie intake has really began to over take your calories burned. Getting a good medical check up can be a good ace to start.