Care Decongestant tablets contain the same ingredient that you will find in Sudafed products. This medicine is known as Pseudoephedrine and it works by constricting blood vessels, reducing swelling, and therefore mucous production, effectively relieving your congestion.These Decongestant tablets containing pseudoephedrine can be used for a short period of time to help with congestion caused by the following:Cold & FluSinusitisCatarrhHay Fever & Allergies