Julie Woods blurted 12/7/2021 Is Anyone On The Drug Warfarin? How Are You Coping? My Doctor Is Prescribing It To Me. I Googled It And Found Some Scary Stuff! Jenn, if you're concerned, most insurances pay for a second opinion. It may be that you MUST be on this drug. Warfarin is a blood thinner. It does have side effects as do all drugs, but just to re-assure yourself I'd seek a second opinion.