Fredicoff-AP Syrup is a combination of four medicines: Ambroxol, guaifenesin, chlorpheniramine and phenylephrine. Ambroxol is a mucolytic which thins and loosens mucus (phlegm), making it easier to cough out. Guaifenesin is an expectorant which works by decreasing the stickiness of mucus (phlegm) and helps in their removal from the airways. Chlorpheniramine is an antiallergic which relieves allergy symptoms like runny nose, watery eyes and sneezing. Phenylephrine is a decongestant which narrows the small blood vessels providing relief from congestion or stuffiness in the nose.