Beverly Hills-based plastic surgeon Dr. Sarmela Sunder is revealing a quite simple way to make Botox injections last longer: By taking a zinc supplement.

The key to successfully treating an overactive bladder with Botox injections comes down to determining the correct dosage.

Only licensed professionals—like dermatologists, plastic surgeons, or trained nurses—should administer Botox. Verify their qualifications and ask about their training with Botox.

The CDC and Prevention and FDA are warning people to beware of bogus Botox injections.

Dear Dr. Roach: In two weeks, I am supposed to get Botox injections in my bladder for an overactive bladder (OAB) and my frequent need to urinate at nighttime. Are these injections safe?