Consult a healthcare practitioner if symptoms persist or worsen. Consult a healthcare practitioner if you have a liver disorder or develop symptoms of liver trouble; if you are taking antianxiety medications, seizure medications, antihistamines, bronchodilators, muscle relaxants, and/or opiates. Do not use if you are pregnant or if you are taking anticancer medications, blood thinners, antidepressants (e.g. selective serotonin reuptake inhibitors [SSRI]), anti-HIV agents, cardiovascular medications, immunosuppressants, and/or contraceptive medications. Avoid prolonged exposure to sunlight, ultraviolet light (UV), or UV therapy. Hypersensitivity, such as an allergy, has been known to occur; in which case, discontinue use. Some people may experience mild gastrointestinal disturbances, nausea, restlessness and/or headaches.