Ive been taking Karvezide for high blood pressure for about 3 months and during this time I have been experiencing heart burn and occasional inability to swallow. Lately the condition has become a daily occurance, very severe and lasting for hours. I reported it to dr who has given me a referral to take an endoscopy but has increased my dosage of Karvezide as blood pressure still high. Can you tell me if heartburn can be a side effect of Karvezide? I dont really want to go for endoscospy and have never suffered heartburn previously.