Anyone taking Zofran??

Hey this is my first pregnancy and I'm starting to get paranoid seeing all these lawsuit commercials on tv and Facebook about zofran causing birth defects. Ive had bad morning sickness since 6wks and I'm now 15 wks and still pretty nauseous and throwing up at times and seems like zofran is the only thing that helps! My doctor claims its  considered safe to take and there isn't enough evidence to prove it causes birth I was just curious if anyone else is  taking zofran or what the views are on it! Thanks!!