A decongestant is a broad class of medications used to relieve nasal congestion. Generally, they work by reducing swelling of the mucous membranes in the nasal passages. Most decongestants cause response from adrenoreceptor a1, chiefly responsible for vasoconstriction . The effects are not limited to the nose and these medicines can increase hypertension through vasoconstriction, but most decongestants are not pronounced stimulants due to lack of response from the other...