They aren't as fast - acting as oral meds like Capstar but they are effective and work pretty quickly, killing nearly all fleas within 18 hours of applications. (pesthacks.com)
I was at 365 lbs and taking five shots of insulin a day and 2 different oral meds, I lost a friend to kidney failure when I finally woke up to the seriousness of diabetes and what might happen to me. (ditchthecarbs.com)