Not sure what to take ? sudafed or mucinex (guaifenesin). trying to get over nasty residual effects of flu, i.e phlegm and congestion.

Meds for flu symptom: Sudafed (the kind you may have to sign for at the pharmacy) helps relieve congestion by shrinking the tiny blood vessels in the nose. Not okay if you have uncontrolled high blood pressure. Plain Mucinex (guaifenesin) helps if you also drink lots of water, by making the mucus more fluid so it runs out rather than getting stuck. Can be taken in combination as in Mucinex D.