Hello. I have heard that Robitussin helps with cm. I was just wondering if anyone could tell me when to take it, how much and what kind of Robitussin. I have been ttc for 2-1/2 yrs with no luck at all. I just started taking B6 two months ago to help with my LP and it seems to be working. I do not produce much CM, so I thought I would give the Robitussin a try. Thanks a bunch!