Coriander oil is an essential oil and is thought to be one of the earliest spices in the world that was used for medicinal purposes. Among the many health benefits of coriander oil is its analgesic properties. Because it is an essential oil, it should always be used together with a carrier oil, for example, emu oil or coconut oil. Or, you can search for a topical lotion that contains it. A study published in the International Journal of Biomedical Science showed that, in clinical trials, various extracts of coriander were comparable to morphine.[9] Although these studies were on coriander extracts and not the oil itself, other studies have shown that coriander oil has analgesic and anti-inflammatory properties and can an effective treatment for joint pain.[10]