Doc still hasn't given me the benicar. I'm waiting for him to call. Yes the Felidopine gives me a headache. I took my Lisinopril, clonidine and hctz and my BP was quite down at work. Then it edged up and I took the felidopine at noon and now this afternoon I have a headache. I have however noticed my heart rate is up. Do you have this problem too?