constipation, drug induced
"I have had a very positive experience with this drug daily over the last 2 months.  Side effects nil.  If you are concerned about side effects you should talk to your physician, but my two cents would be not to be dissuaded by a few bad experiences reported on this board, as those are extreme outliers if you look at the label.  Anyway, best advice is always to talk to your doc.  Good luck if you are looking for help on OTC drugs, like I was!"