According to my friend who suffers when there is pollen/smoke in the air, it is typically sold out when he needs it, because other people breathe the same conta

According to my friend who suffers when there is pollen/smoke in the air, it is typically sold out when he needs it, because other people breathe the same contaminated air. So he has to drive around to ~5 pharmacies to occasionally score a a box. He does try to stock up during low season, but it's hard to do.