Allegra M: This product can be taken twice a day. If you have a sinus infection with inspissated mucus, you need to promote mucus drainage by nasal irrigations with warm salt water and instilling nasal decongestant sprays. Steam may also loosen mucus trapped in sinus cavities. Effective antibiotics are also needed for most severe sinus infections. Allegra M is only an antihistamine.
Answered 6/14/2021
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