Abstract: An inhaler is described for introducing a solid substance in particulate form into the inhaled air of a user. The inhaler comprises a body in which is provided an endless orbital path 3 for one or more balls 4. Air enters the path via an air inlet optionally through an intake conduit. Air leaves the orbital path 3 in a centripetal direction through an air discharge system and an air outlet. The solid substance to be inhaled is provided, preferably in the form of a film, on the surface of the orbital path or on the surface of the ball. A user inhales through the air outlet 8, and this causes air to be drawn into the orbital path through the air inlet. This causes the ball to circulate around the orbital path, in which process solid substance is dislodged and caused to flow with the air out through the outlet.

Abstract: In a process of producing a sustained release preparation containing indomethacin or niomethacin, the active ingredient in the form of a powder as well as one or more food grade substances having a solubility of at least 1 gram per 10 milliliters in an aqueous liquid at any pH value from 1 to 9 and a temperature of 37.degree. C., and one or more food grade substances having a solubility of at least 1 gram per 100 milliliters in an aqueous liquid at any pH value from 1 to 9 and a temperature of 37.degree. C. are thoroughly mixed and the resulting mixture is mixed with a solution of one or more food grade substances which in an aqueous liquid have(a) a solubility below 1 gram per 1000 milliliters in an aqueous liquid at any pH value from 1 to 9 and a temperature of 37.degree. C., or(b) a solubility below 1 gram per 1000 milliliters at a pH value of 1 and a temperature of 37.degree. C.