I just want to mention to be careful about anti-histamines. Though they definetly dry up that post-nasal drip, they dry up the secretions in our lungs which makes it really hard to cough up and out. I can't cough up anything if I take a Claritin or Sudafed and the whole point of therapies is to cough out that stuff. So just be careful and have him tell you if he's having trouble coughing up stuff once he's on it.