WVasoconstriction
WCafaminol
WCaffeine
WCocaine
WDMPX
WDopamine (medication)
WErgine
WErgotamine
WFelypressin
WAntihistamine
WMephedrone
WMethylphenidate
WNorpropylhexedrine
WOxymetazoline
WPhenylephrine
WPropylhexedrine
WTerlipressin
WTetryzoline
WXylometazoline
WYohimbine