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Based on the symptoms described for Peng, it is likely that he is abusing hallucinogens. Here's why:
1. Increased heart rate and lack of appetite: Hallucinogens can cause physical effects like increased heart rate and loss of appetite.
2. Seeing things that are not there: Hallucinogens can induce hallucinations, causing individuals to see, hear, or feel things that are not real.
3. Sweating more than usual: Hallucinogens can also lead to increased sweating as a side effect.
4. Struggling with depression and memory loss: Chronic use of hallucinogens can contribute to mental health issues like depression and impair memory function.
Therefore, considering the range of symptoms described – increased heart rate, lack of appetite, hallucinations, excessive sweating, depression, and memory loss – the most likely illegal drug that Peng is abusing is hallucinogens.
