Counterfeit medicines are a serious issue facing patients, health professionals and the pharmaceutical industry.

Counterfeit medicines are made by someone other than the original manufacturer and whilst some counterfeit medicines may have the correct active ingredient, some are dangerous as they may:

  • be contaminated
  • include too much or too little of the active ingredient
  • contain no active ingredient
  • undermine the patients' confidence in taking medicines
  • have been made in extremely unsanitary conditions
  • contain harmful or poisonous ingredients

MSD takes the safety of patients extremely seriously and is working with governments and customs authorities around the world to help control the problems caused by counterfeit medicines.

For more information about counterfeit medicines please visit