The primary element in cannabis, THC, giving users a euphoric effect, appears to impair memory in two important ways. First, cannabis users don’t experience the temporary loss of memory as drinkers do after a big binge but it’s not easier to form new memories while under the influence. Second, short-term recalling can be a challenge. Luckily, studies demonstrate that recurrent cannabis users might develop a tolerance to these effects and face less difficulty in recalling events after use.[1] A study discovered that THC notably impaired recall 2 hours after use,[2] but there were no residual effects that lasted after 24 to 48 hours. Another study on cannabis found that people taking higher doses of cannabis frequently for a long time (five or more years) developed poorer verbal memory recall than people who didn’t consume, or consumed less.[3] The study’s main author, Reto Auer, a professor at the University of Lausanne in Switzerland, claimed that they tested verbal recall of about 3400 Americans over a 25-year period and found that the frequent cannabis users could recall 8.5 out of every 15 words on average. On the contrary, the people who didn’t consume, or consumed less could recall 9 out of every 15 words. Though the difference is half a word, Auer suggested that longer time consuming cannabis might create memory difficulty.