Other breath-activated inhalers are also called dry powder inhalers. These inhalers do hamiş contain the pressurised inactive gas to propel the medicine. You don't have to push the canister to release a dose. The letters α and β[18] denote absolute stereochemistry at chiral centers—a specific nomenclature distinct from the R/S https://www.ird.gov.lk/en/Lists/QuickFeedback/DispForm.aspx?ID=265400