After teaching a group of students about loop diuretics, the instructor determines that the teaching has been successful when the students identify which agent as the safest for use in the home? a) Furosemide
Bottom line: Although research is ongoing, over-the-counter personal lubricants are generally safe for most people if used as directed, and they can be a good solution for vaginal dryness or otherwise reducing friction (or boosting pleasure) in your sex life.
There is evidence that use -- particularly frequent use -- of a spermicidal lubricant containing N-9 may actually increase a person's susceptibility to STDs. Because of this, few sex educators will recommend the use of spermicidal lubricated condoms.