Consult a health care practitioner prior to use if you have allergies to bee products, poplar products or Peruvian balsam; or if you are pregnant or breastfeeding. Consult a health care practitioner if symptoms persist or worsen. Hypersensitivity, such as allergy, may occur following the use of propolis. If so, discontinue use immediately. Consult a health care practitioner if use continues beyond one month.