My ILs have nearly 20 indoor cats plus they take care of about 10-15 roaming neighborhood cats and they have 3 indoor dogs. My cat allergies aren't bad and a Zyrtec gets me through a visit. However, DS gets a dry hacking cough while there and it continues for nearly a week after every visit and keeps up the whole family at night. He also coughs for a few days after my ILs come over to our house to visit. They only live an hour away, so we see them quite frequently. Zyrtec helps him a little, but not completely.
Is there something else we can do? I don't want this to get in the way of his relationship with them, but it seems to get worse each time we see them. Luckily my MIL has stopped taking in strays after realizing the cats are causing such a problem for DS, but until they start dying off, they are here to stay (and most of them are only 5-7 years old).