Individual differences exist in patients, and allergic reactions may occur in the process of taking medication. If a patient is allergic to a certain type of antihypertensive drug, he or she can switch to another type of antihypertensive drug, and there are many types of antihypertensive drugs. For example, if a patient is allergic to taking calcium channel blockers, the representative drugs of this kind of drugs are amlodipine, felodipine, etc. The patient can switch to the antihypertensive drugs of Pulmicort or Sartan, the representative drugs are Irbesartan, Fosinopril, Benadryl and so on. If taking the above drugs are allergic, you can also choose to take diuretics, such as hydrochlorothiazide tablets, indapamide tablets. In addition to this, there are also beta-blockers, representative drugs are metoprolol, bisoprolol and so on. So if a patient is allergic to taking one antihypertensive drug, he or she can switch to other drugs to try.