Cautions and warnings: Consult a health-care practitioner if sleeplessness persists for more than 4 weeks. Avoid taking with alcohol or products that cause drowsiness. Consult a health-care practitioner prior to use if you are taking medications for seizure, for blood pressure, to suppress the immune system (immunosuppressive medications), to affect mental state or increase sedation; steroids; or blood thinners. Consult a health-care practitioner prior to use if you have cardiovascular, immune, liver, or chronic kidney disease; hormonal or seizure disorders; asthma; depression; diabetes; low blood sugar; or migraine.
Contraindications: Do not use if you are pregnant or breast-feeding. Do not drive or use machinery for 5 hours after taking melatonin.