articleAmid this summer's sweltering temperatures, many people are finding relief by sipping fruity cocktails and smoothies or drinking fruit juices. But a doctor is warning millions of people taking common medications such as statins and antidepressants that ingesting grapefruit — a common "healthy" ingredient in many summer snacks and drinks — can have serious consequences. It plays an important role in breaking down oral medications so that the body can properly process them. Meanwhile, patients taking certain blood pressure medications like amlodipine "may experience dizziness and low blood pressure." People should keep an eye on mixed fruit juices , smoothies and cocktails, as grapefruit juice is a common ingredient, she said.