Quote Originally Posted by almostgone View Post
There is something in Mucinex FastMax DM that I can't tolerate. Even on my maintenance BP meds, it pushed my BP up into an undesirable range ( ~ 182/108) after 4 days of use.
Fastmax DM has dextromorphan, which is just a cough suppressant. But Fastmax (no DM) contains phenylephrine, a vasoconstrictor/nasal decongestant.