For nasal sprays like Flonase, relief may be experienced within 12 hours, but full relief will be achieved in approximately three to four days. Some allergy medications, like antihistamines, may cause ...

Antihistamines may help prevent allergy symptoms. But sometimes you may need to take additional medications. This is especially the case if you need to relieve sinus pressure and a congested nose.

to twice-daily azelastine (an intranasal antihistamine), fluticasone propionate, the combination of the two, or placebo for 2 weeks during the allergy season; all treatments were administered as ...

They significantly favoured loratadine in combination with betamethasone over single-drug therapy ... and without antihistamine therapy during acute severe exacerbations of allergic rhinitis.

Antihistamines are medications that people often use to ease allergy symptoms. They also have other uses, such as for motion sickness. Interaction result: Taking Aricept with antihistamines can ...