Janet Burns, a 69 year old woman, presents to the clinic with complaints of a burning sensation in the chest every morning before breakfast and evening after dinner. She has also noticed persistent cough and hoarseness develop in the last 2 years. She had similar symptoms in the past but did not pay close attention while working multiple shifts as a registered nurse. The burning pain improved with weight loss in her fifties but returned after retirement due to a sedentary lifestyle and a diet consisting of deep-fried Cajun meals. She has been self-treating her symptoms with Tums and drinking more milk, but it hasn't been fully effective. She is considering purchasing Tagamet after seeing a commercial on TV about treating stomach acid. Should she buy Tagamet?