What distinguishes a spansule from other capsules?

A spansule is specifically designed to provide a time-release mechanism for medication, which differentiates it from standard capsules. The construction of a spansule involves multiple beads or granules within a single capsule that can dissolve at various rates. This allows the active ingredient to be released slowly over an extended period, ensuring a more consistent therapeutic effect compared to immediate-release formulations.

In contrast, the other options refer to characteristics not specific to spansules. Some capsules may dissolve quickly (option A) but lack the time-release feature. While there are capsules designed for easier swallowing (option C), this is more about size and formulation rather than the specific release mechanism. Lastly, while a capsule may contain multiple medicines (option D), this does not define a spansule because it can contain a single medication formulated for extended release. Therefore, the key feature that distinguishes a spansule is its time-release capability, making option B the correct choice.