938 763b1 the disclosure of which is incorporated herein by reference the drug can exist as a solid e g crystal or powder an oil or as a liquid in addition the drug may exist in a microcapsule containing the drug or as a microparticle any suitable liquid carrier can be employed suitable liquid carriers include a collagen solution a sterile aqueous solution a sterile saline solution an alcoholic solution or any suitable mixture thereof in addition the liquid carrier can be an emulsion formed from a mixture of an oil or lipid with a sterile aqueous solution or a sterile saline solution specifically the liquid drug delivery system can be the atrigel u00ae system mixed with a powder drug e g doxycycline or leuprolide acetate specifically the liquid carrier can be a collagen solution and a powder drug specifically the liquid carrier can be a sterile aqueous or a sterile saline solution and a powder drug specifically the liquid can be an alcohol and a drug mixed with a sterile saline or a sterile aqueous solution specifically the lipid formulation can be mixed with a sterile aqueous solution or a sterile saline solution to form an emulsion specifically the liquid carrier e g a sterile.