Background
The goal of this work was to develop a levonorgestrel liposome-loaded microneedle array patch for contraception.
Conclusion
The levonorgestrel liposome-loaded microneedle array patch showed better contraception than the drug-loaded microneedle array patch.
Methods
Levonorgestrel-loaded liposome was formulated by a solvent injection technique, characterized, and studied.
Results
The formulated liposomes were characterized for particle size (147 ± 8 nm), polydispersity index (0.207 ± 0.03), zeta potential (-23 ± 4.25 mV), drug loading (18 ± 3.22%) and entrapment efficiency (85 ± 4.34%). A cryo high-resolution transmission electron microscopy and cryo field emission gun scanning electron microscopy study showed spherical shaped particles with a smooth surface. The in vitro drug release and in vivo pharmacokinetic study showed sustained behaviour of Levonorgestrel for 28 days.