Turmeric and genetics could alter painkiller effects, study finds

Copied word for word from the study's registry entry, so the wording is the study team's rather than ours.

Inclusion Criteria: * Aged from 18-64 years and healthy * Not taking any medications (prescription and non-prescription) or dietary/herbal supplements known to alter the pharmacokinetics of diclofenac or curcumin * Willing to abstain from consuming caffeinated beverages or other caffeine-containing products the evening before and morning of the first day of each study arm * Willing to abstain from consuming any alcoholic beverages for one day prior to any study day, during the 14-hour inpatient days, and for the outpatient visit(s) following the 14-hour days * Willing to use a secondary method of birth control that does not include the introduction or discontinuance of hormonal-based birth control (such as abstinence, copper IUD, or condoms) * Have the time to participate * Written informed consent (and assent when applicable) obtained from subject or subject's legal representative and ability for the subject to comply with the requirements of the study Exclusion Criteria: * Under the age of 18 or over the age of 65 years * Smoke/vape/chew tobacco products * Use cannabis products, including marijuana, hemp, and other THC- or CBD-containing products * Have any current major illness or chronic illness such as (but not limited to) kidney disease, hepatic disease, diabetes mellitus, hypertension, coronary artery disease, chronic obstructive pulmonary disease, cancer, or HIV/AIDS * History of anemia or any other significant hematologic disorder * History of drug or alcohol addiction or major psychiatric illness * Pregnant or nursing or plan to become pregnant within 3 weeks after participation * History of allergy intolerance to diclofenac or curcumin * Taking concomitant medications, both prescription and non-prescription (including dietary supplements/herbal products), known to alter the pharmacokinetics of diclofenac or curcumin * Taking any turmeric spice or curcumin supplement * Presence of a condition or abnormality that, in the opinion of the Investigator, would compromise participant safety or quality of the data * Out-of-range clinical laboratory value that the study physician considers participation in the study a health risk