HONG KONG — Like many across East Asia, North Koreans have been exchanging presents this month to celebrate the Lunar New Year. But rather than tea, sweets or clothing, some in this impoverished, isolated country are giving the gift of crystal meth.

The gifting and use of methamphetamine, a powerful stimulant that has been blamed in health and addiction crises around the world, is said to be a well-established custom in North Korea. Users are said to inject or snort the drug as casually as they might smoke a cigarette, with little awareness of its addictive qualities or destructive effects.

“Meth, until recently, has been largely seen inside North Korea as a kind of very powerful energy drug — something like Red Bull, amplified,” said Andrei Lankov, an expert on the North at Kookmin University in Seoul, South Korea, who directs the news site NK News. That misconception, he said, highlighted a “significant underestimation” within the country of the general risks of drug abuse.

Methamphetamine was introduced to the Korean Peninsula during the Japanese colonial period, in the early 20th century, and defectors have reported that the North Korean military provided methamphetamine to its soldiers in the years after World War II. Since the 1970s, many North Korean diplomats have been arrested abroad for drug smuggling.