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What is acrivastine and pseudoephedrine?

Acrivastine-pseudoephedrine (Semprex-D) is a combination medication for the treatment of allergies and sinus congestion. Acrivastine is an antihistamine that blocks histamine action, and pseudoephedrine is a decongestant that assists with sinus drainage. The combination of acrivastine and pseudoephedrine is a prescription medication that is intended to be used for approximately 14 days.

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