Why does vaping CBD make you tired?

Even though the tiredness you feel could theoretically be caused by either vaping or just CBD on its own, it's more likely the CBD. It's not as definitive as saying "CBD makes you tired" since everybody is different and will have different reactions to different substances, but there are a number of potential side effects that CBD can cause, one of them being somnolence (tiredness). It's important to note, however, that adverse reactions to CBD are very few and far between.

In addition, it's not unusual to feel that vaping makes you tired. Although this is most commonly attributed to nicotine crashes (similar to caffeine), you could still experience fatigue from the nature of vaping with or without nicotine.

It can be as a result of both. Some CBD vape oils are made specifically to help you relax. Most of them contain terpenes and should be taken close to bedtime. Some experts believe the calming effect of these products can make one feel tired. Secondly, vaping, as a method, can cause tiredness especially for inexperienced vapers.