Introduction:
Vervain is a perenial herb from Europe with scientific name Verbena officinalis, also known as Holy Herb or Simpler’s Joy.
Vervain Adverse Reactions and Interactions:
Verbena officinalis may decrease the effect of warfarin (Coumadin) therapy since it contains vitamin K.
Assessment and Plan:
Verbena officinalis may decrease the effect of warfarin (Coumadin) therapy due to content of vitamin K.
References:
1.Argento, A., Tiraferri, E., and Marzaloni, M. Oral anticoagulants and medicinal plants. An emerging interaction. Ann.Ital.Med Int 2000;15(2):139-143. http://www.ncbi.nlm.nih.gov/pubmed/10920504