Can there be any side effects with taking lacix water pill?

More restroom time: Other than a marked increase in awareness of where restrooms are located after taking lasix, (furosemide) the biggest side effect profile to monitor would be that if the medication works too well, you may urinate out too much of your electrolytes, and result in a low potassium level. Also, too much diuresis may result in alteration of your kidney function. This is why periodic lab monitoring is important.