WLaxative
WOxyphenisatine
WAloe
WAndrews Liver Salts
WAntimonial cup
WAxelopran
WBevenopran
WBile Beans
WBisacodyl
WBisoxatin
WCarter's Little Liver Pills
WCastor oil
WCucurbitacin
WDantron
WDocusate
WEcballium
WElobixibat
WEnema
WEthulose
WFlorantyrone
WL-Glucose
WGlycerol
WLactitol
WLactulose
WLinaclotide
WLiquid paraffin (drug)
WLubiprostone
WMacrogol
WMagnesium citrate
WMagnesium hydroxide
WMagnesium sulfate
WMercury(I) chloride
WMethyl cellulose
WMineral oil
WMurphy drip
WPhenolphthalein
WPlantago
WPlum
WPluto Water
WPolycarbophil calcium
WPolyethylene glycol
WPrune
WRhamnus (plant)
WSal Hepatica
WSenna glycoside
WSerutan
WSodium picosulfate
WSorbitol