1. All asthmatic patients will have more trouble at night as the diameter of the bronchi becomes lesser at night . Best remedy  is to give Levolin nebulisation . 2. You should avoid those foods which trigger his symptoms . If they don't seem to be responsible for the symptoms then there is no need of a blanket ban on any foods 3.There is no need of a cough syrup 4. As already mentioned , ideal medication in an acute attack should be Levolin nebulisation . You should also add a steroid inhaler twice a day along with levolin inhaler