<unk>  extended-release tablets in Japan<unk> , also known as 1,3-dimethylxanthine, is a phosphodiesterase inhibiting drug used in<unk> erapy for respiratory diseases such as chronic obstructive pulmonary disease (COPD) and asthma under a variety of brand names. As a member of<unk> e xanthine family, it bears structural and pharmacological similarity to<unk> bromine and caffeine, and is readily found in nature, being present in tea (Camellia sinensis) and cocoa <unk> broma cacao). A small amount of<unk>  is one of<unk> e products of caffeine metabolic processing in<unk> e liver. Acebrophylline, an airway mucoregulator and anti-inflammatory agent is a combination product of ambroxol and<unk>  7 acetic acid.
Theophylline
Tiotropium bromide
Salbutamol
Fluticasone
Roflumilast
Levosalbutamol
Formoterol
Arformoterol