The present application relates to compositions comprising
flumazenil and
naltrexone and methods of use thereof. In particular, the present invention relates to a pharmaceutical composition comprising a microdose of
flumazenil and a microdose of
naltrexone, or a pharmaceutically acceptable salt thereof, where the
flumazenil and
naltrexone are present in a weight ratio of about 25: 1 to about 10: 1, where the composition is in the form of a single
dose unit, and wherein the single
dose unit comprises flumazenil in an amount that provides a daily microdose in the range of about 250 to about 7,500 micrograms and naltrexone in an amount that provides a daily microdose in the range of about 25 to about 1,000 micrograms. The present invention also relates to methods of treating depression and / or
anxiety and / or post traumatic stress disorder (PTSD) using a combination of flumazenil and naltrexone.