Side Effects of Lavender Oil
Some people may develop an allergic reaction to lavender oil. There are also instances when people experience side effects such as headaches, nausea, vomiting, and chills after inhaling or applying the oil topically.26
I advise pregnant women and nursing moms to avoid using this oil, as the safety of lavender oil for these conditions hasn't been identified. The US National Institutes of Health (NIH) also warns against using lavender oil when taking medications like barbiturates, benzodiazepines, and chloral hydrate, as it may increase their sedative effects and cause extreme drowsiness and sleepiness.27