INTRODUCTION TO NOVEL DRUG DELIVERY SYSTEMS (NDDS)
Novel Drug Delivery Systems (NDDS) are modern methods of delivering drugs into the body in a controlled, targeted, and efficient manner. Unlike conventional dosage forms, NDDS ensure drug delivery at the right place, right time, and right amount.
These systems improve therapeutic effectiveness, reduce side effects, and enhance patient compliance using technologies like nanoparticles, liposomes, patches, and implants.
Classification of Novel Drug Delivery Systems
Controlled Drug Delivery Systems
These systems release drugs slowly over time. Examples include sustained-release tablets and osmotic pumps.
Targeted Drug Delivery Systems
Drug is delivered directly to the affected tissue, reducing side effects. Examples include targeted liposomes and antibody-drug conjugates.
Nanotechnology-Based Systems
Nanoparticles improve drug absorption and targeting. Examples include nanosuspensions and nanogels.
Vesicular Drug Delivery Systems
Use vesicles like liposomes to protect drugs from degradation.
Transdermal Drug Delivery Systems
Drugs are delivered through skin patches like nicotine and fentanyl patches.
Implantable Systems
Devices implanted to release drugs over long duration such as hormone implants.
Mucoadhesive Systems
Attach to mucosal surfaces for better absorption.
Gastro-Retentive Systems
Remain in stomach longer to improve absorption.
Pulmonary Drug Delivery Systems
Deliver drugs directly to lungs using inhalers and nebulizers.
Ocular Drug Delivery Systems
Used for eye drug delivery with better retention.
Advantages of NDDS
- Improved therapeutic effectiveness
- Reduced side effects
- Controlled drug release
- Better patient compliance
- Protection from degradation
- Lower dose required
Challenges of NDDS
- High cost
- Complex manufacturing
- Stability issues
- Regulatory challenges
- Limited large-scale production
Summary:
NDDS are advanced systems that improve drug delivery efficiency, safety, and patient compliance. They represent the future of modern pharmaceutics.
