If you order your prescriptions from Canada, you probably won’t be able to get them after October 22. Canadian pharmacies say a new U.S. Customs rule will stop most shipments at the border, and they’re telling customers to order refills by October 10. I’m affected too, since it’s how I get my cat’s asthma inhaler. Here’s what the government actually changed, who’s behind it, and what you can do right now.