Lasix is a diuretic that helps remove excess water buildup from your body by making you urinate more often. Naturally, you have to take care of yourself by being hydrated more frequently than before. Especially during summers, you need to drink enough water when you know you sweat or exercise. If you don’t remain hydrated, it can make you feel light-headed, dizzy, sick, thirsty and decrease the number of times you pee. It can lead to serious health implications.