Pharmaceutical Gels: A Review
There are different semisolid dosage forms that are used for topical applications among which gels formulations are becoming pre-eminent. The basic network of gel is a combination of a gelling agent and a solvent in which the drug molecules are embedded or entwined evenly. The nature of the solvent classify gels into two basic types i.e. organogels and hydrogels. This review highlights the basic advantages of gel formulations over other semisolid preparations as well as limitations of their use. Other aspects such as their classification, formulation, mechanism involved in the formation of gels and factors affecting their formulation have also been included.