As of now, the types of synthetic drugs are constantly evolving, and new compounds are often appearing, making the entire drug market very dynamic and complex. The following are some of the more popular types of synthetic drugs in recent years: 1. **Fentanyl and its derivatives**: This powerful synthetic opioid has become an important cause of fatal drug overdoses. Its derivatives, such as carfentanil, have higher potential dangers. 2. **Synthetic cannabinoids**: Also known as "spice" or "K2", this type of substance mimics the effects of tetrahydrocannabinol (THC), but may cause more serious health problems. 3. **Synthetic stimulants**: Including "bath salts" (for example, methcathinone and its derivatives), these compounds often cause intense excitement, delusions and other psychiatric symptoms. 4. **New psychoactive substances (NPS)**: This category includes a variety of compounds that are constantly being modified to circumvent legal restrictions, and their properties and effects may not be fully studied, with unknown risks. 5. **New derivatives of phenylethylamine and methylenedioxymethamphetamine**: Such as new variants of MDMA (ecstasy), these synthetic drugs are often used for recreational and psychoactive effects. It is important to note that the market for new synthetic drugs is changing rapidly, and producers are constantly introducing new chemical structures to evade legal supervision, posing serious challenges to health and society. It is recommended to pay attention to the latest reports from the World Health Organization and public health agencies of various countries to obtain the latest information. It is very important to stay alert to any possible drug threats and seek professional help.