Which of the following is considered an adverse reaction to steroid use?

Cushingoid appearance is recognized as an adverse reaction to steroid use as it refers to a specific set of symptoms and physical characteristics resembling those seen in Cushing's syndrome, which occurs due to high levels of cortisol, a steroid hormone. This condition can manifest through weight gain, particularly in the face and trunk, as well as thinning skin, easy bruising, and other changes in body composition. The development of this appearance is directly linked to the excessive administration of corticosteroids, which can disrupt the balance of hormones within the body leading to these undesirable effects.

The other options, such as increased energy levels, improved muscle strength, and weight loss, are not adverse reactions. In fact, steroids are often associated with improved physical performance and energy in the short term. Weight loss, although it can sometimes occur in certain contexts, is not typically linked to steroid use when considering the overall physiological changes that steroids can cause, which generally lead to weight gain rather than loss.