Sedating antihistamines uk advice dating romance
Acrivastine is a non-sedating antihistamine, which works by blocking histamine H1 receptors, which cause allergic symptoms.
(There are other types of antihistamines that affect H-2, H-3, and H-4 receptors.) People build up tolerance to them over time and when they stop taking them experience rebound insomnia.
Acrivastine is the fastest acting allergy relief capsule and starts working in about 15 minutes, providing fast relief.
It can also be taken as required (up to three times per day) so that you can take as and when you need.
Once released, this histamine causes small blood vessels (called capillaries) to widen (dilate).
This causes many of the symptoms of allergy, as these blood vessels then start to leak their contents into the body tissues causing inflammation of the nose, eyes or airways and results in itchy watery eyes, a runny nose, sneezing and nasal congestion.