Hi.. Can understand your concern.. As per your complain Losartan which is a medicine to treat blood pressure and minimize the risk of heart strokes has dizziness and dryness of mouth as side effects.. The treatment for this can be done by either reducing the dose of the medicine or change of medicine if possible.. Other ways to provide symptomatic relief is by drinking plenty of water as well as consuming more of cool liquids.. You can take sour candies and sugar free chewing gums as SALIVA STIMULANTS as they help to increase saliva secretion and relieving your symptoms.. There are some artificial saliva agents present in the market in the form of gel and sprays that can be frequently taken during the day to relieve symptoms.. You should consult your doctor and if your medicine can be changed its a better option to get relieved of symptoms.. Hope your query is solved.. If you find the answer helpful please write a positive review and click on find this answer helpful as a token of appreciation.. Thanks and regards.. Dr.Honey Nandwani Arora