What is a key characteristic of soft gel capsules?

Soft gel capsules are primarily characterized by their flexible outer shell, which is designed to contain liquid formulations. This flexibility allows them to easily accommodate different types of liquid medications, enhancing patient comfort during swallowing. The outer shell is typically made from a gelatin-based material that is softer than that of hard capsules, contributing to its pliable nature.

The liquid inside can include oils, extracts, or other solutions, which makes these capsules particularly useful for medications that require rapid absorption. This design also protects the contents from air and light, which can degrade certain medications.

The other options do not accurately describe soft gel capsules. They are not designed to have a hard shell or be indented for division, and while they may contain solvents, they are not specifically alcohol-based for solubility. Thus, the defining feature of their flexible outer casing is what sets soft gel capsules apart.