What capsules are characterized by a flexible outer shell?

Soft gel capsules are characterized by their flexible outer shell, which is made from a gelatin material that is softer and more pliable than the rigid shell of hard-shelled capsules. This flexibility allows soft gels to contain liquid formulations, making them suitable for encapsulating oils, vitamins, and other ingredients that are in liquid form. The design of soft gel capsules also enhances the absorption of the contents, as the gelatin shell dissolves quickly in the stomach, releasing the active ingredients efficiently.

In contrast, hard-shelled capsules consist of two rigid parts that are typically made from gelatin and are used primarily for powdered or solid formulations. Syrups and suspensions do not refer to capsules but rather are liquid formulations that contain active ingredients dissolved or suspended in a liquid medium. This distinction is important in understanding the different forms of medication and their appropriate uses.