These days, people are increasingly taking more than one medication and may also be using dietrary supplements. So it is useful to know that some drugs interact with each other, and certain foods and supplements can cause problems with medication too.
Warfarin (blood thinning drug): avoid cranberry juice, grapefruit and gingko.
Calcium supplements can affect thyroid hormone therapy (levothyroxine) and sertain heart drugs.
St John's Wort interacts with many medications, including antidepressants, warfarin and digoxin.
Feature in Healthspan, Summer 2014
