purple butterbur

Reported Uses

• NOTE: see Herb & Supplement Effectiveness Rating Definitions table
• allergic rhinitis [Possibly Effective]
• anxiety [Insufficient Evidence]
• asthma [Insufficient Evidence]
• atopic dermatitis (eczema) [Possibly Ineffective]
• chronic bronchitis [Insufficient Evidence]
• cough [Insufficient Evidence]
• insomnia [Insufficient Evidence]
• migraine prophylaxis [Possibly Effective]
• peptic ulcer [Insufficient Evidence]
• somatoform disorders [Insufficient Evidence]

Reported Doses

Safety/efficacy may not be established; reported doses may be derived from limited or potentially inadequate studies w/ variable regimens, multi-ingredient products, or where concentration of active ingredients may vary widely

Effectiveness Ratings

[see Herb & Supplement Effectiveness Rating Definitions table]

allergic rhinitis

[Possibly Effective]

Dose: 16-100 mg/day divided bid-tid

asthma, adult pts

[Insufficient Evidence]

Dose: 25 mg PO bid; Alt: 150 mg/day PO divided tid

asthma, peds pts

[Insufficient Evidence]

Dose: 50-150 mg/day PO divided tid; Info: for pts 6-17 yo

migraine prophylaxis, adult pts

[Possibly Effective]

Dose: 75-150 mg/day PO divided qd-bid

migraine prophylaxis, peds pts

[Possibly Effective]

Dose: 50-75 mg/day PO divided bid-tid for pts 8-9 yo; 100-150 mg/day PO divided bid-tid for pts 10-17 yo

somatoform disorders

[Insufficient Evidence]

Dose: 90 mg PO bid-tid