My mother has been taking Zocor (40 mg) and Toprol-Xl (50 mg) for many years. She recently began taking Lisinopril (20 mg) and Norvasc (5 mg). Ever since, she has been suffering with daily dizziness. Her doctor refuses to change her medication. What is the benefit of taking Lisinopril? We think this is the medication causing her dizziness. What can be substituted for the Lisinopril? Thank you!