If you are willing to use it consistently, cromolyn is an old drug that may be effective pre-exposure. As I understand it, it’s essentially useless post-exposur

If you are willing to use it consistently, cromolyn is an old drug that may be effective pre-exposure. As I understand it, it’s essentially useless post-exposure. I’ve been told that it’s safe to stack it with antihistamines. The ophthalmic form requires a prescription, for some reason.