PERENNIAL VERSUS SEASONAL ALLERGIC RHINITIS Perennial AR occurs year-round regardless of season and is triggered by aeroallergens such as dog/cat dander, dust mite residue, cosmetics, cockroaches, and mold.AR is characterized by 1 or more of the following symptoms: nasal congestion, rhinorrhea, sneezing, and itching.In the summer months the pollen count is generally higher and you may be in contact with the allergen on a regular basis.Taking the medication regularly may help keep your symptoms under control.Once-daily fexofenadine appears to offer effective and well-tolerated relief from the symptoms of this illness.INTRODUCTION With allergy season upon us, people will be seeking an OTC product for allergy symptom relief, and pharmacists will be making recommendations based on individual patients’ needs (eg, fast working, nonsedating, and long lasting).
An antihistamine tablet typically starts to work within 30 minutes after being taken.
Their effectiveness will also depend on the dose you take and what form the medicine is given in.
Drug companies are naturally pretty reluctant to go around testing medicines on pregnant or breast-feeding women, so there aren't any studies to guide them.
Examples of sedating antihistamines: Sedation is rare with non-sedating antihistamines, however patients should be made aware that a sedative effect may occur and performance of skilled tasks such as operating machinery or driving maybe affected.
Antihistamines are a group of medicines which act by blocking the action of the chemical called histamine in the body.