Pharmacology A patient on warfarin was given phenobarbitone, The result would have been – A Increase the dose of warfarin B Decrease the dose of warfarin C Increase the dose of phenobarbitone D Decerease the dose of phenobarbitone 💡 Explanation A patient on warfarin was given phenobarbitone, The result would have been - ✓ Correct Answer: A. Increase the dose of warfarin