I've heard a lot about this particular brand, and I just stumbled across it in a rent's cabinet. The active ingrediants are: Chlorpheniramine maleate - 4 mg, and DXM which is 30mg per pill. I understand that compared to other brands, 30mg is a lot to have in one pill. Is this particular brand with this Chlorpheniramine maleate bad for you, which is what I've heard? What if it was only for one time and no other uses, would it have a significant effect on your health. I've heard that you should just get one's that have only DXM, but is this not that dangerous for one dose? I only way ~140 pounds, about how much of chlorpheniramine maleate is lethal for my weight? And if this is safe for a first time (and only time) doser, what is a good amount of DXM mg? Thanks.