摘要:
Described is a dry powder inhaler comprising an intake section; a mixing section, and a mouthpiece. The mouthpiece is connected by a swivel joint to the mixing section, and may swivel back onto the intake section and be enclosed by a cover. The intake chamber comprises a special piston with a tapered piston rod and spring, and one or more bleed-through orifices to modulate the flow of air through the device. The intake chamber further optionally comprises a feedback module to generate a tone indicating to the user when the proper rate of airflow has been achieved. The mixing section holds a capsule with holes containing a dry powder medicament, and the cover only can open when the mouthpiece is at a certain angle to the intake section. The mixing section further opens and closes the capsule when the intake section is at a certain angle to the mouthpiece. The mixing section is a Venturi chamber configured by protrusions or spirals to impart a cyclonic flow to air passing through the mixing chamber. The mouthpiece includes a tongue depressor, and a protrusion to contact the lips of the user to tell the user that the DPI is in the correct position. An optional storage section, with a cover, holds additional capsules. The cover for the mouthpiece, and the cover for the storage section may both be transparent, magnifying lenses. The capsules may be two-part capsules where each portion has apertures which correspond to apertures in the other half when each half is partially fitted to the other half, and fully fitted to the other half. All the apertures may be closed when the two halves are rotated around their longitudinal axes with respect to each other. Each capsule may have a unique key on each half that only fits with a particular inhaler.
摘要:
An inhaler is instantly activated upon its removal from a cover or cover unit, and by rotating a cartridge component of the inhaler with respect to a mouthpiece portion, so as to create a flow pathway for ambient air and particles. The cartridge component includes a chamber, whose contents typically include dry powders or the like. Upon creation of the flow pathway, the contents of the chamber are instantly accessible for immediate inhalation by a user through the mouthpiece portion.
摘要:
An inhaler is instantly activated upon its removal from a cover or cover unit, and by rotating a cartridge component of the inhaler with respect to a mouthpiece portion, so as to create a flow pathway for ambient air and particles. The cartridge component includes a chamber, whose contents typically include dry powders or the like. Upon creation of the flow pathway, the contents of the chamber are instantly accessible for immediate inhalation by a user through the mouthpiece portion.
摘要:
A drug delivery device that aerosolizes a dry powder formulation so that it forms a fine coating in the oral cavity and, more specifically in the sublingual region of the oral cavity is described herein. In the preferred embodiment, the device contains five main parts: (i) a compressed gas canister, (ii) a dispenser body (also referred to herein as the main housing ), (iii) a means for storing one or more doses of a drug formulation, (iv) a means for releasing a dose of the drug formulation such as a gas canister or spring piston and (v) a mouthpiece. Preferred configurations include circular, tubular, and rectangular. The means for storing the drug formulation may be configured to separately store one or more materials. In one embodiment, the means for storing the active agent is in the form of one or more drug discs, where the drug discs contain a plurality of blister packs, each storing one dose of the drug formulation. In another embodiment, the means for storing the active agent is a dosage cartridge containing a single dose of the drug formulation. In yet another embodiment, the drug formulation is stored on a ribbon containing a plurality of blister packs, each storing one dose of the drug formulation.
摘要:
A drug delivery device that aerosolizes a dry powder formulation so that it forms a fine coating in the oral cavity and, more specifically, in the sublingual region of the oral cavity is described herein. In the preferred embodiment, the device contains five main parts: (i) a compressed gas canister, (ii) a dispenser body (also referred to herein as the main housing), (iii) a means for storing one or more doses of a drug formulation, (iv) a means for releasing a dose of the drug formulation such as a gas canister or spring piston and (v) a mouthpiece. Preferred configurations include circular, tubular, and rectangular. The means for storing the drug formulation may be configured to separately store one or more materials. In one embodiment, the means for storing the active agent is in the form of one or more drug discs, where the drug discs contain a plurality of blister packs, each storing one dose of the drug formulation. In another embodiment, the means for storing the active agent is a dosage cartridge containing a single dose of the drug formulation. In yet another embodiment, the drug formulation is stored on a ribbon containing a plurality of blister packs, each storing one dose of the drug formulation.
摘要:
Methods, devices and kits for sublingual drug delivery using iontophoresis are described herein. An active agent can be administered sublingually by placing a solid oral dosage form containing the active agent in the sublingual region of a patient and applying iontophoresis for a suitable period of time. Preferably up to 4 mA of current are applied to the sublingual region. Different time ranges can be used to administer iontophoresis; preferably iontophoresis is administered for up to 2 minutes at a time. Any suitable device for administering iontophoresis to the sublingual region may be used. The preferred device is a hand-held device that contains a handle, two electrodes, one of which is located on the handle and the other of which is attached to the end of the handle, and a connection to a power source. Optionally, the device contains a timer, which can be used turn off the current at a preset time. The device can be used to administer an active agent by iontophoresis to the sublingual region of a patient, by attaching the second electrode of the device to a solid oral dosage form containing the active agent to be administered. A kit contains the device for administering iontophoresis and one or more solid oral dosage forms, preferably in the form of one or more tabs or wafers. The tabs or wafers may be completely dissolvable or edible, or may contain a non-edible and non-dissolvable component. In a preferred embodiment, the solid oral dosage form contains insulin or an analog thereof and one or more excipients, preferably EDTA and citric acid.
摘要:
Improved methods for forming fine particles of a material have been developed, wherein the method steps include dissolving the material in a solvent to form a dilute solution, immobilizing the dilution solution, and then removing the solvent to yield particles of the material. Methods of immobilizing the dilute solution include freezing, gelation, and chelation. In a preferred embodiment, the immobilized solvent is removed by lyophilization, i.e. reducing the ambient pressure while avoiding application of sufficient heat to power a phase transition. Essentially any material and solvent for the material can be used in the methods described herein. Proteins and peptides in an aqueous solvent are the preferred systems.
摘要:
Methods are described for targeting the release of an active pharmacological agent in an animal by administering that agent encapsulated in proteinoid microspheres which are stable to the environment encountered from the point of introduction until they migrate to the targeted body organs, fluids or cells and are there unstable. Orally administered delivery systems for insulin, heparin and physostigmine utilize encapsulating microspheres which are predominantly of less than about 10 microns in diameter and pass readily through the gastrointestinal mucosa and which are made of an acidic proteinoid that is stable and unaffected by stomach enzymes and acid, but which releases the microencapsulated agent in pharmacologically active form in the near neutral blood stream. Basic proteinoid microspheres encapsulating a dopamine redox carrier system are administered in the weakly basic, where they are stable, and then enter the blood stream, where the encapsulated agent is similarly released.
摘要:
Gel, powder, suspension, emulsions or film formulations for systemic delivery of insulin with improved stability and rapid onset of action are described herein. The formulations are preferably absorbed to a mucosal surface, most preferably via buccal or sublingual administration, although rectal, vaginal, nasal or ocular administration is possible. The formulations contain insulin in combination with a chelator and dissolution agent, and optionally additional excipients. In the preferred embodiment, the formulation contains human insulin, a zinc chelator such as EDTA and a dissolution agent such as citric acid. Following administration, these formulations are rapidly absorbed into the blood stream. The formulation is preferably a polymeric gel, powder or film which adheres to the mucosal surface, thereby enhancing uptake of the incorporated drug. In the preferred embodiment, this formulation is administered sublingually, most preferably before a meal or after a meal.
摘要:
Dry powder formulations of drugs such as antihistamine for nasal administration are provided where the drug is retained in the nasal cavity, and systemic side effects minimized or eliminated, through the selection of a narrow particle size range, between approximately 10 and 20 microns in diameter. In a preferred embodiment wherein the drug is an antihistamine, retention of the antihistamine at the nasal mucosa is improved and the bitter aftertaste associated with liquid antihistamine formulations significantly reduced. By making a dry powder formulation of an antihistamine (e.g., azelastine) having an average particle size of between 10 and 20 microns, the antihistamine is restricted primarily to the desired target organ, the nasal mucosa. Because the active ingredient stays in the nasal region, a lower dose can be used to achieve the same desired effect. As demonstrated by the examples, this lower dose reduces the incidence of somnolence, and because the active ingredient remains at the target organ and does not accumulate in the back of the throat and mouth, this formulation does not impart a bitter taste.