Identification

• White willow bark is a member of the salix family and is found in all areas except Antarctica and Australia. Willows are small trees, ground cover and shrubs, and some have yellow or green flowers. When used for medicinal purposes, white willow bark is collected from young trees in the early spring.
  
  

Potential

• According to Drugs.com, white willow bark research does not reveal information regarding its toxicity. However, those taking white willow bark should watch for nausea, vomiting, blood in the stool, stomach irritation, tinnitus and kidney irritation.
  
  

Side Effects

• The side effects associated with the use of white willow bark may include nausea, dizziness, skin rash and dizziness. There is a risk of allergic reaction with white willow bark, which can become life-threatening. According to Wrong Diagnosis.com, taking willow bark in excessive doses can cause ulcers, stomach upset and bleeding.
  
  

Drug Interactions

• The most common drug interactions occur when combining white willow bark with salicylates. Avoid using products that contain salicylates, barbiturates, alcohol, sedatives, anticoagulants and seizure medication to avoid possible toxic drug interactions.