Twins

Alysha • I am a 4th grade teacher married to a special ed teacher. We have a little girl that turned 2 on 5/25 and is going to be a GREAT big sister!
I was wondering if moms prego with twins have to take prescription strength prenatal vitamins or do twins not need any extra supplement? Will over the counter vitamins work? Also, if there are any moms who have had both twin and a single pregnancy, did you feel different?