Some possible allergic reactions to high blood pressure medicines include oral allergy syndrome, extreme facial swelling, itchy mouth, scratchy throat and anaphylaxis, according to Science Daily. If patients take angiotensin-converting enzymes as a blood pressure medicine, the reactions could be more severe.
Most people who take high blood pressure medicines do not experience side effects. Whenever there are side effects, they are only mild, as stated by WebMD. At the same time, patients experiencing oral allergy syndrome may confuse it with food poisoning. In this regard, the syndrome is associated with several allergens: oranges, melons, apples, pears, celery, carrots, kiwi, peach, cucumber and sunflower seeds.
Should a patient experience allergic reactions or any other side effects, he is required not to stop the medication unless advised to do so by his doctor. Similarly, pregnant women or those aspiring to become pregnant in the near future must get professional advice, as stated by WebMD.
Some medications for high blood pressure may cause erectile dysfunction, according to WebMD. In addition, people who take insulin to manage diabetes may experience blood sugar alterations when they take high blood pressure medications, such as diuretics and beta-blockers. When the side effects are severe, doctors may recommend taking lower doses or change of medication.