| Objcetive Use hydroxypropyl-β-cyclodextrin and erythromycin to fabricate supermolecule, we get a soluble supermolecule-system. This supermolecule-system can be used in injections. Mothlds Utilize supersonic, machinery and shaken three kinds of methods,we get some injections. In accordance with State Food and Drug Administration(SFDA) pharmacopoeia, we evaluatde it.Results Machinery is the best mothld. The injection that we geted in pain better than erythromycin lactobionate. Stability and content to fit in with pharmacopoeia. Conclusion We completed the research of soluble erythromycin injections. We get some sample,it can be used in injections. |