The parents of a girl who went blind after taking Children’s Motrin have sued Johnson & Johnson, saying the packaging didn’t adequately explain the possible risks. The court case has drawn attention to the possible side effects of a drug most parents view as benign.

Stevens-Johnson syndrome isn’t something that most parents worry about, but it is a potential reaction which can lead to severe problems.

Side effect of the drug can include severe allergic reactions such as hives, facial swelling, asthma, shock, skin reddening, rash and blisters.