Ruwan quinine wani abin sha ne wanda ke dauke da quinine, wani sinadarin alkaloid mai daci wanda aka samu daga bawon bishiyar cinchona. Yawancin lokaci ana amfani dashi azaman mahaɗa don abubuwan sha, musamman gin da tonic. An samo asalin ruwan Quinine a matsayin hanyar isar da quinine ga daidaikun mutane don magance ko rigakafin zazzabin cizon sauro, saboda quinine yana da maganin zazzabin cizon sauro. Koyaya, a yau ana amfani da shi da farko don ɗanɗanonsa na musamman.