Like stated above, meds don't really make the water cloudy, it just sometimes makes a lot of bubbles on the surface of the water.
It is possible that it could be a bacterial bloom.
Also, make sure that it is not just the inside of the glass that is a little dirty, sometimes this is the case. The dirty glass makes the water look dirty.
But if it is a bacterial bloom, do not worry about is, as it should clear in a couple of days.
And if it is form the meds, the Carbon will take care of it.
If it is still there for more than a week, let us know and we will be able to help you out more then.
-FHM