Nasal Congestion
"I was told by my doctor to take Sudafed for allergy congestion. I guess she didn&#039;t know that it interacts BADLY with my synthroid and cytomel! (although she SHOULD have known - she is a doctor, after all.) After taking sudafed, I had a major anxiety attack and my blood pressure shot through the roof. It took HOURS for it to wear off. Apparently, there is a warning on the box that people with thyroid disease shouldn&#039;t take sudafed. Sudafed causes the effects of synthroid to increase dramatically and synthroid does the same thing to the Sudafed. If you take synthroid AVOID sudafed!! I threw the box away and will never take it again. I blame my Doc for not knowing this stuff is dangerous to thyroid patients."