Future Way Nutrition SleepRex 45 sublingual tab contains fast-dissolving sublingual tablets with melatonin and vitamin B6, formulated to support relaxation, normal sleep onset and the sleep–wake cycle. A Kuwait pharmacy listing identifies 5 mg melatonin and 2 mg vitamin B6 per serving. It is intended for short-term adult sleep support and may cause drowsiness, so it should not be used before driving.