Decongestants are given to free the air passage way of the nose. When these passageways are cleared mucus can go through and be flushed out of the body. Antihistamines are used to prevent allergic reactions. Pain relievers or painkillers are used as a quick fix to the head ache caused by the sinus pressure. Pain killers don’t really address the main problem or the sinusitis but only solves a symptom thereof.
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