A drug may be classified by the chemical type of the active ingredient or by the way it is used to treat a particular condition. Each drug can be classified into one or more drug classes.
Nasal antihistamines and decongestants are agents, which when delivered into the nostril help relieve symptoms of hay fever and congestion.
Nasal antihistamines block the action of histamine, which is released on exposure to allergens. They are used to relieve hay fever symptoms such as sneezing, runny nose and other nasal symptoms.
Nasal decongestants cause vasoconstriction in the nasal passages and relieve nasal congestion. Nasal congestion is caused by dilated blood vessels.
See also
Medical conditions associated with nasal antihistamines and decongestants:
- Hay Fever
- Nasal Congestion
- Rhinorrhea
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