IMULAN BioTherapeutics, LLC | Antihistamines (Medication)


Antihistamines are a type of medicine often used to treat a number of allergic health conditions.

These include:hay fever; allergic rhinitis – inflammation of the nose due to an allergic reaction to substances such as dust mites; allergic skin conditions, such as eczema or urticaria (hives); allergic conjunctivitis – inflammation of the eyes. ...

Side Effect:

Some of the main side effects of antihistamines include:dry mouth,

drowsiness, dizziness, nausea and vomiting, restlessness or moodiness (in some children), difficulty urinating or inability to urinate, blurred vision, confusion.

Less common side effects of first-generation antihistamines include:insomnia – difficulty sleeping; nightmares; hallucinations – seeing or hearing things that aren't real; itchy skin.

Rare side effects of first-generation antihistamines include:rapid heartbeat; chest tightness. ...


If you're taking an antihistamine that causes drowsiness, try to take it before bedtime. Avoid using during the day when driving.

Antihistamines may interact with other medications you are taking, so before taking them inform your healthcare provider about any medications you are taking.

Talk to your doctor before using antihistamines if you have an enlarged prostate, heart disease, high blood pressure, thyroid problems, kidney or liver disease, a bladder obstruction, or glaucoma or other conditions that cause a rise in eye pressure. Also check with your doctor if you are pregnant or nursing. ...