Before taking oral antihistamines you should know that generally the second generation second generation antihistamines such as loratidine (Claritin), cetirizine (Zyrtec) and fexofenadine (Allegra) are safe as long as they are taken at the recommended doses. You should avoid those that are combined with decongestants such as pseudoephedrine if you have a history of high blood pressure, heart disease, glaucoma, or insomnia. You should also stop taking decongestants if you experience side effects such as increased blood pressure, heart rate, tremors, or dizziness. If your allergy symptoms are more persistent and bothersome, you should consider using a daily steroid nasal spray as this is considered first line treatment for patients whose allergies are affecting their quality of life.
Nasal Agent
Nasal drugs are used to relieve congestion and treat allergies.