What are dry mixtures used for solutions made on the spot in the pharmacy? What is included in the dry mixture? How long do they last?
The dry mixture has insufficient stability in aqueous solution, such as antibiotics. It is dry powder contains all components; Drug, flavors, colorants, buffers. The only component not included in the mixture is the solvent. Once the dry mixture is added to the solution, it remains stable for only 7-14 days. They generally only last the regimen prescribed and must be discarded afterwards.