Know Antihistamine Drug Side Effects - Tips to Overcome Allergies

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Know Antihistamine Drug Side Effects - Tips to Overcome Allergies
Antihistamines are drugs used to treat various types of allergies.

As with any medication, there are side effects and contraindications associated with the use of antihistamines.

Antihistamines can relieve allergy symptoms such as runny or stuffy nose, itchy, watery eyes, rashes, and sneezing.

Antihistamine drugs are generally sold in tablet and capsule form, but there is also a syrup that is used in children. Antihistamines are also available as a nasal spray.

Antihistamines How it Works

Antihistamine drugs work by blocking the release of histamine into the body.

Histamine is released when the body reacts to allergens, such as dust, mold, or pet dander.

The release of histamine causes glands in the nose or eyes to swell and secrete mucus to prevent allergens go deeper into the body.

However, the effect of histamine is often more disturbing than the allergen itself. By limiting the body's ability to release histamine, allergic responses can be reduced.

Side Effects

As with any medication, antihistamines also have some side effects.

Commonly reported side effects include drowsiness, headache, increased stomach acid, impaired vision, dry mouth, and irritability.

Most side effects will go away on their own over the body adapt to antihistamines.

Other side effects, such as palpitations, shortness of breath, difficulty urinating or difficulty breathing, should be immediately reported to the doctor.


Patients with glaucoma, stomach ulcers, bladder problems, high blood pressure, heart disease, seizure disorders such as epilepsy, overactive thyroid and had to get a doctor monitoring while taking antihistamines.

If you are pregnant or nursing, consult your doctor before taking antihistamines.


Certain medications can react with antihistamines.

If you are currently taking sleeping pills, tranquilizers, depression medication, seizure medications or painkillers, consult your doctor before taking antihistamines.