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Is guaifenesin syrup effective for cough?

Guaifenesin syrup may not be very effective for cough relief. It is suggested to use nasal hygiene with a saline solution as the best treatment. If your symptoms are due to seasonal allergies, taking an antihistamine like Aerius or Claritin may provide greater benefits than the syrup. It's always a good idea to check with your pharmacist to confirm if the product is safe for you.