A nurse is reinforcing teaching with a client who is dependent on nicotine and wishes to discontinue smoking. The nurse should inform the client that which of the following is a manifestation of nicotine withdrawal?

Insomnia refers to the difficulty in falling asleep or staying asleep, leading to sleep disturbances. It is a frequently reported symptom during the initial phase of nicotine withdrawal. While weight loss can be associated with smoking cessation due to changes in metabolism, it is not a direct manifestation of nicotine withdrawal. Similarly, diarrhea is not a commonly reported symptom of nicotine withdrawal. Diaphoresis, which refers to excessive sweating, can occur in some individuals during nicotine withdrawal, but it is not as commonly observed as insomnia. It is worth noting that different individuals may experience varying symptoms during nicotine withdrawal, and the intensity and duration of these symptoms can also differ.