The use of heat to deliver fentanyl via pulmonary drug delivery

Abstract

The golden standard to treat acute pain is by intravenous drug delivery of opioids such as fentanyl or morphine. Intravenous drug delivery requires the placement of an intravenous (IV) port, which can cause infections, dislodgments, and distress to the patients, and therefore a non-invasive method is desirable. Pulmonary drug delivery is a non-invasive method that has been shown to be a good alternative to intravenous administration. New devices have been investigated for treating acute pain by delivering fentanyl by heat. The pure drug, fentanyl, is applied onto a surface which is then heated up to 350 °C and inhaled, resulting in no formation of degradation products. Furthermore, forced degradation of fentanyl has been studied which showed that longer heating time and higher temperatures will result in the formation of degradation products. The evidence indicates that heat can be used to deliver drugs to the lungs where fast onset reaction can be obtained giving fast and non-invasive pain relief.

An Accurate Temperature Regulating Scheme Based on a Resistor With Tailored Nonlinearity for Evaporative Drug Delivery

“…Evaporation of medical substances has been identified as a promising route for future drug delivery to the lungs [1,2,3,4]. This application demands a reliable temperature control to avoid overheating and thereby destroying the medical substance.…”