Which of the following is a common indicator of cocaine use?

Frequent sniffing is a common indicator of cocaine use because cocaine is often inhaled through the nose, leading to irritation of the nasal passages. This irritation and the body's natural response to the drug can cause an individual to sniff frequently. In contrast, the other options reflect symptoms that are not characteristic of cocaine use. Tiredness, low energy, and increased appetite are typically associated with different substances or conditions, rather than the stimulant effects of cocaine, which generally increase energy and alertness. Understanding these symptoms can help in identifying substance abuse issues and responding appropriately.