Diphenhydramine (benadryl) is the strongest antihistamine you can buy OTC
25 mg is all you should need
The other ones like loratadine or cetirizine are not as effective but they also have less severe side effects
Fluticasone (corticosteroid) spray is also pretty effective but also totally localized, so if you're getting rashes and itching all over, it won't help. It will definitely help for runny nose though
Diphenhydramine (benadryl) is the strongest antihistamine you can buy OTC
25 mg is all you should need
The other ones like loratadine or cetirizine are not as effective but they also have less severe side effects
Fluticasone (corticosteroid) spray is also pretty effective but also totally localized, so if you're getting rashes and itching all over, it won't help. It will definitely help for runny nose though