Abstract: The present invention provides high-concentration formulations of opioids such as fentanyl or fentanyl congeners. The formulation of the invention comprises fentanyl or a fentanyl congener in concentrations significantly in excess of conventional formulations, e.g., on the order about 2-fold to about 10,000-fold greater than conventional formulations, e.g., currently commercially available formulations. These formulations are particularly useful for long-term delivery to a subject suffering from pain. The invention further provides drug delivery devices comprising the high-concentration opioid formulations, and further provides methods of alleviating pain in a subject, comprising administering the high-concentration formulations to a subject in need thereof.

Abstract: The present invention provides high-concentration formulations of opioids such as fentanyl or fentanyl congeners. The formulation of the invention comprises fentanyl or a fentanyl congener in concentrations significantly in excess of conventional formulations, e.g., on the order about 2-fold to about 10,000-fold greater than conventional formulations, e.g., currently commercially available formulations. These formulations are particularly useful for long-term delivery to a subject suffering from pain. The invention further provides drug delivery devices comprising the high-concentration opioid formulations, and further provides methods of alleviating pain in a subject, comprising administering the high-concentration formulations to a subject in need thereof.

Abstract: The present invention provides high-concentration formulations of opioids such as fentanyl or fentanyl congeners. The formulation of the invention comprises fentanyl or a fentanyl congener in concentrations significantly in excess of conventional formulations, e.g., on the order about 2-fold to about 10,000-fold greater than conventional formulations, e.g., currently commercially available formulations. These formulations are particularly useful for long-term delivery to a subject suffering from pain. The invention further provides drug delivery devices comprising the high-concentration opioid formulations, and further provides methods of alleviating pain in a subject, comprising administering the high-concentration formulations to a subject in need thereof.

Abstract: The invention features devices and methods for treatment of pain. The drug delivery device is a drug delivery system adapted for whole implantation in a subject and to provide pain relief by delivery of fentanyl or a fentanyl congener (e.g., sufentanil) over a protracted period of time (e.g., at least 3 days or more than 3 days). The device comprises a housing defining a reservoir that contains a drug formulation, a pump operatively connected to the housing so as to facilitate movement of drug out of the reservoir and out of the device, and a thermal expansion element which defines a flow pathway comprising a thermal expansion channel to accommodate thermal expansion of formulation in the reservoir. The device can further comprise a valve positioned within the flow pathway so as to prevent movement of drug out of the reservoir prior to use.

Abstract: The present invention provides high-concentration formulations of opioids such as fentanyl or fentanyl congeners. The formulation of the invention comprises fentanyl or a fentanyl congener in concentrations significantly in excess of conventional formulations, e.g., on the order about 2-fold to about 10,000-fold greater than conventional formulations, e.g., currently commercially available formulations. These formulations are particularly useful for long-term delivery to a subject suffering from pain. The invention further provides drug delivery devices comprising the high-concentration opioid formulations, and further provides methods of alleviating pain in a subject, comprising administering the high-concentration formulations to a subject in need thereof.

Abstract: The invention features devices and methods for treatment of pain. The drug delivery device is a drug delivery system adapted for whole implantation in a subject and to provide pain relief by delivery of fentanyl or a fentanyl congener (e.g., sufentanil) over a protracted period of time (e.g., at least 3 days or more than 3 days). The device comprises a housing defining a reservoir that contains a drug formulation, a pump operatively connected to the housing so as to facilitate movement of drug out of the reservoir and out of the device, and a thermal expansion element which defines a flow pathway comprising a thermal expansion channel to accommodate thermal expansion of formulation in the reservoir. The device can further comprise a valve positioned within the flow pathway so as to prevent movement of drug out of the reservoir prior to use.