Ok I need advice

I'm currently trying to get pregnant since May 2016 it's just a lot of history and long story short my husband and I have both been checked out just a very long story my question is how are the side effects of taking the one a day prenatal vitamins for couples I'm sure I would be fine but my husband has to watch what he takes because him being a truck driver I'm worried the men's vitamins for it will effect his driving I need to know if anyone that has taken these are they safe for truck drivers I want to know if there is a risk on his ability to drive ??? We heard if I get started taking them it helps to get pregnant and it helps him to develop healthy sperm but we've been checked but he has not had a sperm count or check just the sperm but we both have had blood work done and I've been checked pap smear and ultrasounds everything is ok and good anyone else taking the one a day for couples prenatal vitamins??? Effects if any?? Thanks Dana from Tennessee, USA