Elderly people can take amlodipine benadryl if they need it. Adverse reactions may occur when the elderly take amlodipine benadryl, which should be directed by a doctor. 1. Amlodipine Benadryl can be used to treat high blood pressure, the elderly can take amlodipine Benadryl to treat high blood pressure, but amlodipine Benadryl is mainly metabolized by the liver and excreted by the kidneys, the elderly patients may have a decline in liver and renal function, amlodipine Benadryl need to take a lower starting dose, and to monitor liver and renal function. 2. Adverse reactions such as cough, edema, insomnia, anxiety, fever, rash, dry mouth, diarrhea, and abdominal pain may occur in the elderly after taking amlodipine Benadryl. The drug is contraindicated in older adults who are allergic to Benadryl or other ACE inhibitors or amlodipine, or who have renal failure. Elderly people who need to take amlodipine Benadryl should be directed by a doctor and should not use the drug on their own.