Additional Warnings: Do not use this medicine for more than 7 days. If symptoms get worse, if you get a fever, shortness of breath or blood in your saliva or if symptoms persist for more than 7 days, consult a doctor or qualified healthcare practitioner. Do not use the medicine if you have an allergy to any of the active ingredients, other plants of the Asteraceae (Compositae) family such as marigolds, daisies or artichokes or any other ingredient. listed in section 3. • Are under 18 years old. • Are taking any other medicines known to interact with alcohol e.g. metronidazole.