PVP (polyvinyl pyrrolidone) has a wide range of applications in the pharmaceutical field, mainly in the following aspects:
1. Drug excipients:
- Binder: PVP has good adhesive properties and is often used as a binder for tablets and capsules to help the drug ingredients be evenly distributed and remain stable.
- Solubilizer: PVP can increase the solubility of poorly soluble drugs, thereby enhancing the bioavailability of drugs. For example, PVP can form coprecipitates with poorly soluble drugs, making the drugs easier to dissolve and absorb.
- Disintegrant: PVP can dissolve quickly in the digestive tract, causing the tablets to swell locally and disintegrate, thereby accelerating the release and absorption of the drug.
2. Drug coprecipitant:
- PVP can form coprecipitates with certain poorly soluble drugs, increase the solubility and dissolution rate of the drug, and thus improve the efficacy of the drug. For example, after PVP is combined with certain drugs, the drug can be dispersed in an amorphous state, thereby increasing the solubility of the drug.
3. Delay agent:
- PVP can control the degree of association between drug molecules and PVP molecules, so that the drug is slowly released in the human body, thereby prolonging the efficacy. For example, PVP has the effect of prolonging the efficacy of drugs such as penicillin, chloramphenicol, and insulin.
4. Controlled release system:
- PVP can be made into permeable membranes of different thicknesses and pore sizes together with other polymers to adjust the rate at which the drug passes through the membrane, thereby achieving controlled release of the drug. This controlled release system can ensure that the drug is released at a constant rate within a specific time, thereby maintaining a stable blood drug concentration.
5. Drug film and drug capsule shell:
- PVP can be used to make drug film coats and drug capsule shells, which are not easy to break in a dry environment, thereby protecting the drug ingredients. In addition, PVP can also be made into controlled release membranes with different permeabilities and release rates together with other materials.
6. Electrospinning technology:
- PVP is also used in electrospinning technology and can be used to prepare nanofibers or nanoscaffolds. These materials have potential application value in tissue engineering and drug delivery systems.
In general, PVP is widely used in the medical field, and its unique physical and chemical properties enable it to play an important role in drug preparations, drug delivery and controlled release systems.
