Which of the following is a common sign of medication side effects?

Nausea and dizziness are indeed common signs of medication side effects. Many medications can affect the gastrointestinal system and the central nervous system, leading to feelings of nausea as well as dizziness or vertigo. These symptoms can arise due to how the body reacts to the active ingredients in various medications, such as those that alter chemical balances, influence blood pressure, or impact the inner ear.

In contrast, while increased energy levels, weight gain, and a smoother skin texture can sometimes be associated with certain medications, they are not as universally recognized as common side effects. Increased energy may actually be a sign of improved health or efficacy rather than a side effect. Weight gain is often a long-term result rather than an immediate side effect, and a smoother skin texture may only pertain to specific medication classes, particularly those used for dermatological treatments. Therefore, nausea and dizziness remain clear indicators of side effects that many patients can experience in response to various medications.