Oxybutynin / Oxyspas / Cystran / Tropon OXYBUTYNIN CategoryAnti-spasmodicActionBlock the effect of Ach and inhibit the involuntary detrusor muscle contraction of urinary bladder. IndicationStops bladder spasmsDoseDog - 0.2mg/ kg PO, BD Or 1.25-5mg total dose/dogCat- 0.5-1mg total dose/cat PO, BDContraindicationsGastric dysmotility, urinary bladder obstruction urinary retentionAdverse EffectsUrinary retention, excessive salivation, sedation, carstipationAvailabilityTab. oxyspas-2. 5mg, 5mgTab. Cystran- 2.5mg , 5mgTab. Tropon XL 5-5mg DOSE CALCULATOR