Other breath-activated inhalers are also called dry powder inhalers. These inhalers do not contain the pressurised inactive gas to propel the medicine. You don't have to push the canister to release a dose. Reversing enlargement of blood vessels in the area they are applied to. They cause a narrowing of https://bbs.pku.edu.cn/v2/jump-to.php?url=https://tr.wikipedia.org/wiki/Vitamin