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1. Controlling drug release rate
As a polymer material, HPMC has good film-forming and sustained-release properties. By adjusting the molecular weight, degree of substitution, and preparation process of HPMC, HPMC hollow capsules with different drug release rates can be prepared. This capsule can control the release rate of the drug, so that the drug is released in the body at a predetermined speed and pattern, thereby achieving the purpose of prolonging the efficacy, reducing the number of medications, and improving patient compliance.
2. Protecting drug stability
HPMC hollow capsules can effectively protect the stability of drugs. Because some drug ingredients are prone to degradation or deterioration under conditions such as light, humidity, or oxygen, the HPMC capsule shell has good insulation properties, which can prevent these adverse factors from invading the drug, thereby extending the shelf life and effectiveness of the drug.
3. Masking the bad taste of the drug
Some drugs have a more obvious bitter taste or other bad taste, which will affect the patient's medication experience. HPMC hollow capsules can wrap the drug in it to prevent the drug from direct contact with the mouth, thereby masking the bad taste of the drug and reducing the discomfort of the patient when taking it.
4. Reduce irritation to the gastrointestinal tract
The shell of HPMC hollow capsules has a certain elasticity and buffering effect, which can reduce the irritation of drugs to the gastrointestinal mucosa. This is especially important for some irritating or corrosive drugs, which can reduce the damage of drugs to the gastrointestinal tract and improve the safety of patients' medication.
5. Achieve targeted release
Depending on different types of HPMC capsules (such as oral-dissolving capsules and enteric-coated capsules), targeted release of drugs can be achieved. Oral-dissolving capsules quickly dissolve and release drugs in the mouth, which is suitable for drugs that need to take effect quickly; while enteric-coated capsules can slowly dissolve and release drugs in the intestines, which is suitable for drugs that need to be absorbed or act in the intestines. This targeted release mechanism helps to improve the efficacy of drugs and reduce side effects.
