My Face is like the Desert

My face has become really dry since I've taken the antibiotics. No wonder the pharmacist told me to drink more water. But im in no mood to put anything in my injured mouth. Lucky I bought Clinique moisturiser a few days ago, if not I really dont know what to do. And I dont know its the anti biotic or the moisturiser that controlling all the facial oil that seem to have shorten its working hours.Its still irritating coz my face feels itchy and I keep scratching it. Have to feedback it to my dentist and request a change of medication next week.