Abstract: Disclosed are methods for a novel, counter-intuitive, non-obvious, non-invasive, simple to administer, non-systemic delivery of analgesics through the skin to the DRG and DH area to block and relieve pain in the dermatomal distribution of that particular DRG. This method of pain control provides a non-addictive, inexpensive, simple to use alternative to the present standard of care involving addictive, potentially dangerous opioid therapy.

Abstract: Disclosed are compositions of matter and related methods that provide a metered dose inhaler that includes a formulation having a dose that comprises a hydrofluoroalkane propellant and dihydroergotamine mesylate particles; wherein the dose includes between 0.1 mg to 4 mg of dihydroergotamine mesylate; wherein the dihydroergotamine mesylate particles have a cumulative drug substance particle size distribution with d10>0.5 micron volumetric median diameter and d90<5.0 micron volumetric median diameter.

Abstract: Disclosed are compositions of matter and related methods that provide a metered dose inhaler that includes a formulation having a dose that comprises a hydrofluoroalkane propellant and dihydroergotamine mesylate particles; wherein the dose includes between 0.1 mg to 4 mg of dihydroergotamine mesylate; wherein the dihydroergotamine mesylate particles have a cumulative drug substance particle size distribution with d10>0.5 micron volumetric median diameter and d90<5.0 micron volumetric median diameter.