Pharmacology One of the following statements about hydralazine is not true – A It causes direct relaxation of blood vessels B It causes dilatation of both aeries and veins C Postural hypotension is not a common problem D It increases plasma rennin activity 💡 Explanation One of the following statements about hydralazine is not true - ✓ Correct Answer: B. It causes dilatation of both aeries and veins