Identify a common side effect of corticosteroids.

Weight gain is a common side effect of corticosteroids due to their impact on metabolism and fluid retention. Corticosteroids can lead to increased appetite and changes in fat distribution, often resulting in an accumulation of fat in the abdomen and face, which can be particularly noticeable in long-term use. This weight gain can be exacerbated by the drug's effects on the body's ability to regulate blood sugar levels, leading to conditions such as hyperglycemia.

The other possible side effects associated with corticosteroid use include muscle loss and sleep disturbances, but they are not as universally prevalent or immediately associated with corticosteroid treatment as weight gain is. Increased energy is typically not a side effect of corticosteroids, as these medications can actually lead to fatigue and other systemic effects that counteract feelings of increased energy. Understanding these effects is crucial for managing patients effectively when corticosteroids are prescribed.