My doctor has me up to 40mg per day of Lisinopril, and 5mg of Amlodipine. After taking this increased dosage for 13 days, my blood pressure readings were fantastic, and stayed that way for 9 days. Then the readings started coming up, and I started having some breathing problems. I wondered if my daily banana could cause problems since I read there can be a problem with potassium and Lisinopril.