Next, the freebase cocaine is converted into cocaine hydrochloride. This is the white to off white crystalline powder most think of when they imagine of cocaine. The reasons for converting freebase cocaine into a salt form include: The history of heroin dates back as far or farther than the ancient Egyptians. Records indicate that opium was used by the ancient Egyptians, Greeks and Romans. The poppy even appears on Egyptian art dating back 6,000 years. Opium was imported to China around 800 A.D. By the 1600s, opium smoking was widespread throughout China. In 1680, a famous English physician named Thomas Syndenham introduced opium to the medical field. Marijuana also harms when it contributes to auto crashes or other incidents that injure or kill, a problem that is especially prevalent among young people. In a study reported by the National Highway Traffic Safety Administration, even a moderate dose of marijuana was shown to impair driving performance. Meth users may exhibit sexually compulsive behaviour while under the influence of Methamphetamine. This disregard for the potential dangers of unprotected sex or other reckless sexual behavior may contribute to the spread of sexually transmitted infections. | 
