Is it safe to be taking Iberogast while taking warfarin? I took it for a few days and my INR count was only 1.7 (was on 8/81/2 mg). Stopped taking it for a few days (and took 91/2 mg) and my INR is still only 2.0. My doctor has suggested I now take 10mg of warfarin per day. I am not taking the Iberogast now.