2-METHYL-THIENO-BENZODIAZEPINE FORMULATION

1. A formulation comprising olanzapine or a pamoate salt or solvate thereof as an active ingredient and one or more carriers selected from the group consisting of an oleaginous carrier or cholesterol microsphere carrier with the proviso that if the carrier is the oleaginous carrier, the active ingredient is olanzapine pamoate or solvate thereof. 2. A formulation as claimed in Claim 1 wherein said formulation has a prolonged sustained release of greater than 7 days and a burst release of less than 15% of the active ingredient. 3. A formulation as claimed in Claim 1 wherein said carrier is oleagenous. 4. A formulation of Claim 1 wherein said carrier is selected from the group consisting of PLURONICS, cellulosic, gums, polysaccharide gums, vegetable oils, refined fractionated oils, sucrose diacetate hexaisobutyrate, chitosan, lecithin, and POVIDONE. 5. A formulation as claimed in Claim 4 wherein said carrier is selected from the group consisting of PLURONICS, cellulosic gums, polysaccharide gums, vegetable oils, and refined fractionated oils. 6. A formulation as claimed by Claim 2 wherein the formulation further comprises one or more pharmaceutically acceptable excipients. 7. A formulation as claimed by Claim 6 wherein the pharmaceutically acceptable excipient is selected from the group consisting of a gelling agent and an antihydration agent. 8. A formulation as claimed in Claim 7 comprising olanzapine pamoate monohydrate, MIGLYOL812 and white wax. 9. A formulation as claimed in Claim 1 wherein olanzapine is the substantially pure Form II polymorph having a typical x-ray powder diffraction pattern as represented by the following interplanar spacings: d (A) 10.2689 0.577 7.4721 7.125 6.1459 6.071 5.4849 5.2181 5.1251 4.9874 4.7665 4.7158 4.4787 4.3307 4.2294 4.141 3.9873 3.7206 3.5645 3.5366 3.3828 3.2516 3.134 3.0848 3.0638 3.0111 2.8739 2.8102 2.7217 2.6432 2.6007 10. A formulation as claimed in Claim 1 wherein the carrier is a cholesterol microparticle. 11. A formulation as claimed in Claim 10 wherein the microparticle is a microsphere. 12. A formulation as claimed in Claim 10 wherein the cholesterol is selected from the group consisting of cholesterol, cholesterol palmitate, cholesterol oleate, cholesterol stearate, and cholesterol hemisuccinate. 13. A formulation as claimed in Claim 10 wherein the microspheres have a particle size of from 20 to 500μm. 14. A formulation as claimed in Claim 13 wherein the particle size is from 30 to 200μm. 15. A formulatio