Patient instructed Levothyroxine is a medication used to treat hypothyroidism. Labs will need to be drawn routinely to check effectiveness & dose may need to be changed. Patient instructed to take this medication 30min. before breakfast & all other meds. Swallow the tablet or capsule whole, with a full glass (8 ounces) of water. The tablet may dissolve very quickly and could swell in your throat. Avoid the following food products, which can make your body absorb less levothyroxine: grapefruit juice, infant soy formula, soybean flour, cotton seed meal, walnuts, and high-fiber foods.