Picking up a Perscripton to increase my milk production

My OB prescribed me pills to increase my milk production. I've tried everything from baking lactation cookies to oatmeal. I've been chugging down water. Nothing seemed to work. I work full time I pump twice while I'm at work and I nurse when I'm at home. I've spent over $100 on teas and drinks with little or no increase. I'm only getting 1 oz. From a 20 to 30 min pump session from both breast. I finally reached at the point where this was my last option. My daughter is 3 months. Has anyone done this and how much milk did it increase for you?