The best thing I know for seasonal allergies is Claritin

I use Zyrtec but also use it year-round.

I can only say what i do for myself ...but would recommend doctors advice before doing the same. i started to take my allergy medicine year round, and have seen a huge drop in the number of cold and viral illnesses. Personally i suspect that for me, allergies weaken my immune system so severely that what would normally be just a runny nose from a bit of pollen still floating around even off season can quickly turn into congestion and breathing issues. So, i have been taking a generic Claritin year round in the morning and a benadryl every night. The benadryl does make me super sleepy and have weird dreams...but I haven't even had a case of the sniffles for last four years. Granted, i don't get out much and people were masked up for a global pandemic during that time, and i keep up on covid and flu shots...so take that for what you will. i have tried prescription allergy medicines, but had bad reaction to many of them , so i stick with Claritin.