Sudafed decongestant tablets for the symptomatic relief of nasal and sinus congestion associated with colds, flu, sinusitis and nasal allergies'. '.strtoupper('s')udafed decongestant tablets contains pseudoephedrine hydrochloride which effectively relieves blocked sinuses and catarrh associated with colds, so you can get on with your day without any drowsiness'. '.strtoupper('h')ow do sudafed decongestant tablets help'? '.strtoupper('s')udafed decongestant tablets with pseudoephedrine hydrochloride, helps clear stuffy noses, catarrh, blocked sinuses and sinus pressure associated with colds, flu and allergies.