According to the dispersion system, injections can be divided into four types:
1, solution injection For drugs that are easily soluble and stable in water, they can be made into water injections, such as sodium chloride injection and glucose injection. Some drugs that are unstable in water solution can be made into oil solution injection, such as progesterone injection, if they are dissolved in oil. According to the molecular weight, it can be divided into low molecular weight solution injection and high molecular weight solution injection.
2. Water-insoluble drugs or drugs that need to be prolonged after injection can be made into water or oil suspension, such as cortisone acetate injection. This kind of injection is usually only intramuscular injection. The solvent can be water, oil or other non-aqueous solvents.
3. Emulsion injection Water-insoluble liquid medicine or oily liquid medicine can be made into emulsion injection according to medical needs, such as intravenous fat emulsion.
4. Sterile powder for injection Sterile powder for injection, also known as powder injection, is a preparation made by filling sterile powder medicine for injection in ampoules or other suitable containers, adding appropriate solvent (usually sterile water for injection) to dissolve or suspend it before use. Sterile powder of water-unstable drugs such as sodium salt and potassium salt of penicillin G.
The first enterprise refers to the pharmaceutical production or management enterprise that has the first supply-demand relationship with the enterprise when purchasing drugs.
The first variety refers to the drugs purchased by an operating enterprise from a pharmaceutical production enterprise for the first time.