Diazepam Loaded Solid Lipid Nanoparticles: In Vitro and In Vivo Evaluations

Area of Science:

• Pharmaceutical Sciences
• Nanotechnology
• Drug Delivery Systems

Background:

• Repetitive administration of diazepam (Dzp) can lead to side effects and reduced patient compliance.
• Sustained release formulations are desirable for improving therapeutic outcomes and patient adherence.

Purpose of the Study:

• To design and prepare diazepam-loaded solid lipid nanoparticles (SLNs) for improved drug delivery.
• To evaluate the physicochemical properties and in vivo performance of the developed SLNs.

Main Methods:

• SLNs were formulated using cholesterol, stearic acid, and glycerol monostearate via high shear homogenization and sonication.
• Characterization included particle size, zeta potential, drug loading efficiency, morphology, DSC, and in vitro release studies.
• In vivo studies were conducted using oral and intraperitoneal administration in Wistar rats.

Main Results:

• Optimized SLNs exhibited an average particle size of 150 nm with a spherical morphology.
• High drug loading efficiency (79.06%) and sustained release (>85% in 24 hours) were achieved.
• In vivo studies showed altered blood distribution of diazepam when loaded into SLNs.

Conclusions:

• Diazepam-loaded SLNs represent a viable strategy for overcoming challenges in diazepam therapy.
• This nanocarrier system holds potential for future applications in managing diazepam-related complications and improving patient compliance.