Black tar heroin is a free base form of heroin that is sticky like tar or hard like coal. Its dark color is the result of crude processing methods that leave behind impurities. Despite its name, black tar heroin can also be dark orange or dark brown in appearance. It is generally less expensive than other forms of heroin.

Health effects 

People who intravenously inject black tar heroin are at higher risk of venous sclerosis than those injecting powder heroin. In this condition, the veins narrow and harden which makes repeated injection there nearly impossible.

All heroin carries the same effects. It is commonly believed that black tar heroin is less pure than other forms of the drug, but that is largely a misconception. While there is a widespread belief that white heroin is purer, it is very often cut with other powders to keep the cost down. Black tar heroin is typically around 30% pure due to the faster, cruder process that the heroin goes through, but the actual purity can vary tremendously. While the process used to create black tar heroin makes it cheaper to produce and to buy, it also often makes the heroin less pure and more dangerous. General effects of heroin, no matter the color, are the same. These include:

• Contentment
• Reduced anxiety
• Relieved tension
• Drowsiness
• Apathy

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