Controlled permeability films are provided wherein spherical andor nonporous filler particles having a size greater than the intrinsic thickness of the film are incorporated in a film forming polymer and the film is treated to reduce the carbon dioxide to oxygen permeability ratio of the film. In other embodiments, provided herein are methods of treatment, prevention, or amelioration of a variety of medical disorders such as, for example, drug addiction or pain using the compounds and compositions disclosed herein. The beam attenuator has a cross section along a plane perpendicular to the direction of propagation of the collimated beam of light of the portion of the attenuator in the shape of a wedge. An equipment enclosure includes a complementary upward extending hanger for engaging the linear channel. There is, therefore, a two-step movement of the plunger, firstly together with the syringe through the medium of the O-ring, and secondly within the syringe container to force the plug forward, when a ledge on the syringe container is arrested by a stop, whereupon the frictional force between the plunger and the O-ring is relieved so that the plunger slides forward through the O-ring. The foregoing is accomplished by placing a radio frequency identification tag in occupant’s nameplate, wherein the tag contains encoding information that identifies the occupant so that when the occupant changes hisher location, the nameplate may be used to update a data base and determine the occupant’s new address.