When does Doxycycline become toxic?

In the case of doxycycline, there has been an historical tendency to include the same warnings that are included for tetracycline. While doxycycline is part of the same family of antibiotics as tetracycline it shares some very important differences. Among those differences is that it DOES NOT degrade to any toxic components over time. In fact, this is one of the main reasons it was included in the kit. The antibiotics in your kit have been very thoughtfully put together by a panel of experts in their field. Including physicians and pharmacists.