I did it and got pregnant the first time...I did miscarry but that's due to my age, I think. It has to be the plain kind, just guaifenesin. I also used pre-seed that month. Good luck!
hey I need to know this answer also! I do know you only need the plain kind, nothing else should be in it just guaifenesin. If you get the one with that is mixed it can have the opposite reaction. Also you need to drink plenty of water!! YOu have to do this in order for it to work. I just started taking clomid and i read to start the guaifenesin on day 10 till ovulation. On a website for fertility i read that you need to take 200mg three times a day!