Drugs can also interact with foods.
Doctors will be told to check patients' diets before prescribing powerful drugs. Medical drugs "are already toxic by their very nature" and could become more toxic when interacting with other prescribed drugs. Some patients are on as many as 10 drugs.
Warfarin can react with green vegetables. Its efficacy is reduced by ice cream & avocados etc. People prescribed statins should not drink grapefruit juice. Antibiotics' efficacy is reduced by milk & dairy products. People on Lithium should not vary their salt intake.
As many as 200 medical drugs may be affected by food.