Encapsulation

Encapsulation refers to the process of enclosing active pharmaceutical ingredients within carrier materials such as liposomes, polymeric matrices, nanoparticles, or microspheres to protect drugs from degradation, control release kinetics, improve solubility, or enable targeted delivery. Encapsulation can enhance pharmacokinetic profiles by prolonging circulation, reducing clearance, and minimising exposure to non-target tissues.

The pharmaceutical industry applies encapsulation to improve therapeutic index and enable formulations otherwise unsuitable for clinical use. Liposomal encapsulation reduces toxicity of certain chemotherapies by altering biodistribution, while polymeric encapsulation enables sustained release for chronic therapies. Encapsulation development requires controlling particle size, loading efficiency, release rates, and stability under storage and physiological conditions. Manufacturing must achieve consistent encapsulation performance across batches while meeting regulatory expectations for characterisation and control. As drug delivery science advances, encapsulation continues expanding through stimuli-responsive systems, targeted carriers, and scalable manufacturing platforms.