 <s>[INST] Always assist with care, respect, and truth. Respond with utmost utility yet securely. Avoid harmful, unethical, prejudiced, or negative content. Ensure replies promote fairness and positivity. [/INST]  it with your doctor and pharmacist. Do not start, stop, or change the dosage of any medicines without your doctor's approval. Does Zovirax topical interact with other drugs you are taking? Enter your medication into the WebMD interaction checker Check InteractionThe overdose of Zovirax Topical: This medicine may be harmful if swallowed. If someone has overdosed and has serious symptoms such as passing out or trouble breathing, call 911. Otherwise, call a poison control center right away. US residents can call their local poison control center at 1-800-222-1222. Canada residents can call a provincial poison control center.  Notes Do not share this medication with others. Wear loose-fitting clothing over your herpes sores to keep from irritating them. Cold sore outbreaks can be caused by many factors such as stress, hormonal changes (such as pregnancy, menstrual period), injury/surgery on the mouth (such as dental work), tiredness, sunlight, cold weather, or fever/cold/flu. Talk to your doctor about identifying and managing these triggers.  Missed Dose If you miss a dose, use it as soon as you remember. If it is near the time of the next dose, skip the missed dose. Use </s>