New synthetic drugs are relative to traditional drugs. Common ones that have become popular in some areas in recent years include the following: **Cahinones**: - **Methcathinone**: It has strong stimulant and hallucinogenic effects, which is extremely harmful to human health. After taking it, it is easy to have headaches, fatigue, anxiety, depression, memory loss, etc. - **4-Methylmethcathinone (MCAT)**: It has stimulant and hallucinogenic effects. After abuse, it will make people extremely excited and even violent. **Phenylethylamines**: - **Ecstasy**: Generally, MDMA (3,4-methylenedioxymethamphetamine), MDA (4,5-methylenedioxyamphetamine), AM (amphetamine) and MAM (methamphetamine) are the main active ingredients. After abuse, the main manifestations are hyperactivity, shaking the head and twisting the waist, dancing, delusions, shamelessness, sexual impulses, hallucinations and violent tendencies. - **Ketamine**: commonly known as "K powder", is generally used as an anesthetic in clinical medicine. Abuse can cause serious toxic side effects to the human body, such as memory loss, mental confusion, hallucinations, etc., and may also cause damage to the heart, lungs, liver, urinary system, etc. **Tryptamines**: - **5-Methoxydimethyltryptamine (5-MeO-DMT)**: It is a substance with strong hallucinogenic effects, which can bring extremely strong spiritual experiences and pose a great threat to the physical and mental health of users. These new synthetic drugs are highly concealed and extremely harmful, seriously affecting personal health, family and social stability. Countries are continuously cracking down on their illegal production, transportation, trafficking and abuse.