<prompt> All of the following are anticholinergics except:Ipratropium bromideDicyclomineAtropineAmphetamine  <response>: Ref: KD Tripathi pharmacology 7th edition page.no: 113 Anticholinergic drugs classification: 1. Natural alkaloids - Atropine, Hyoscine Scopolamine. 2. Semisynthetic derivatives ;Homatropine, Atropine methonitrate, Hyoscine butyl bromide, Ipratropium bromide, Tiotropium bromide. 3. Synthetic compounds a Mydriatics: Cyclopentolate, Tropicamide b Antisecretory-antispasmodics: i Quaternary compounds: Propantheline, Oxyphenonium, Clidinium, Pipenzolate, methyl bromide, Isopropamide, Glycopyrrolate. ii Teiary amines: Dicyclomine, Valethamate,Pirenzepine. c Vasicoselective: Oxybutynin, Flavoxate,Tolterodine. d Antiparkinsonian: Trihexyphenidyl Benzhexol, Procyclidine, Biperiden. Amphetamine is adrenergic drug 