A Real Cause?

I don't watch very much television, but I have still seen many commercials like the one below.



When I went to YouTube to find one of these commercials to post here, I found dozens of similar commercials for the class action lawsuit against Accutane. All of these commercials clearly state that Accutane causes Ulcerative Colitis and Chrohn's Disease. Accutane has been recalled.

I never took Accutane (it's a medicine to treat severe acne). But I still find this very interesting because it is the first time I have ever heard anyone state a cause for Ulcerative Colitis. It's always just been a world of unknowns. Now I realize these commercials are lawyers saying that it is the cause, and not doctors, but I suspect that they must have a significant amount of evidence if they are going to take on the pharmaceutical company.

It just makes me wonder--was there a prescription I took that caused my UC?

Here's another one: