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Precautions

General
The use of willow bark in patients with hypersensitivity to other
nonsteroidal anti-inflammatory drugs is not recommended. Use should be
avoided in people with asthma because severe reactions (acute
bronchospasms) could be induced.

Drug interactions

Currently there are no data indicating that the crude drug interacts with
anticoagulant drugs such as coumarin and heparin. However, it may
increase the effects of anticoagulants. Patients on anticoagulant therapy
should not use products containing the crude drug without the supervision
of a health care professional.

Dosage forms

Crude drug, dried hydroalcoholic or aqueous extracts, tinctures and fluid
extracts.

Posology

(Unless otherwise indicated)
Adult oral daily dose: extracts, tinctures or fluid extracts equivalent to
120–240 mg of total salicin, or 6–12 g of powdered drug material as a
decoction corresponding to 120–240 mg of total salicin) in two divided
doses.

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