Hi, thanks for using healthcare magic
If he is wheezing
then it may be best to visit his doctor for nebulisation.
In some cases congestion of the nose may result in noises that may be misinterpreted as wheezing because of the noise created expelling the air through the nostrils. If this is the case then he may require the use of a decongestant.
Decongestants can be topical or oral. The topical decongestants would be normal saline drops and otrivine pediatric drops. The normal saline can be used as needed however the otrivine should be used up to 3 days because it can cause rebound congestion.
Both are available over the counter in some places. You can use the normal saline drops first and see if this is effective for him.
Oral decongestants can also be used. There are different ones available and they are normally combined with cough
medication. If his cough is wet , you can look for a medication that combines the decongestant with a mucolytic
for example some types of mucinex
medication, though there are others.
Again , if he is wheezing, he would need to be seen.
I hope this helps