Despite considerable preliminary research, there is little high-quality clinical evidence that ajwain has anti-disease properties in humans.
Ajwain is sold as a dietary supplement in capsules, liquids, or powders.
An extract of bishop's weed is manufactured as a prescription drug called methoxsalen (Uvadex, 8-Mop, Oxsoralen)
provided as a skin cream or oral capsule to treat psoriasis, repigmentation from vitiligo, or skin disorders of cutaneous T-cell lymphoma.
Because methoxsalen has numerous interactions with disease-specific drugs, it is prescribed to people only by experienced physicians.
Ajwain is used in traditional medicine practices, such as Ayurveda, in herbal blends in belief it can treat various disorders,
but there is no evidence or regulatory approval that oral use of ajwain in herbal blends is effective or safe.
Women who are pregnant or breastfeeding should not use ajwain due to potential adverse effects on fetal development.
In high amounts taken orally, bishop's weed is considered to be toxic and can result in fatal poisoning.