Complex sentence: It is also used as an inhalant drug that induces a brief euphoria; whilst already intoxicated with stimulant drugs such as cocaine or ecstasy (see MDMA) the euphoric state intensifies and lasts for several minutes longer.
Split into simpler sentences: It is also used as an inhalant drug that induces a brief euphoria. Whilst already intoxicated with stimulant drugs such as cocaine or ecstasy (see MDMA) the euphoric state intensifies and lasts for several minutes longer.