The prescription drug methoxsalen (Oxsoralen, Methoxypsoralen) was originally prepared from bishop's weed, but it is now made in the laboratory. Methoxsalen is used to treat psoriasis, a skin condition.
Bishop's weed is used for digestive disorders, asthma, chest pain (angina), kidney stones, and fluid retention.
Some people apply bishop's weed directly to the skin for skin conditions including psoriasis and vitiligo.
Be careful not to confuse bishop's weed (Ammi majus) with its more commonly used relative, khella (Ammi visnaga). The two species do contain some of the same chemicals and have some similar effects in the body. But Bishop's weed is more commonly used for skin conditions, and khella is usually used for heart and lung conditions.
Insufficient Evidence to Rate Effectiveness for...
Natural Medicines Comprehensive Database rates effectiveness based on scientific evidence according to the following scale: Effective, Likely Effective, Possibly Effective, Possibly Ineffective, Likely Ineffective, and Insufficient Evidence to Rate (detailed description of each of the ratings).
Report Problems to the Food and Drug Administration
You are encouraged to report negative side effects of prescription drugs to the FDA. Visit the FDA MedWatch website or call 1-800-FDA-1088.