Cold sores are small, fluid-filled blisters caused by the herpes simplex virus (HSV-1). They typically appear on or around the lips and are often triggered by stress, illness, or sun exposure.

Cold sores are caused by HSV-1, which remains dormant in the body after initial infection. Reactivation can occur due to stress, fatigue, sunburn, illness, or weakened immunity.

Antiviral medications work by interfering with the virus’s ability to replicate. This helps shorten the duration of outbreaks and reduce symptom severity.

When started early (at the first sign of tingling or burning), antivirals may shorten cold sore outbreaks by several days and reduce the severity of symptoms.

Tablets are typically taken as 1 gram twice daily for 1 day, or as directed. Acyclovir cream is applied directly to the affected area several times daily, starting at the first sign of an outbreak.

Yes.  Cold sore antivirals are generally safe and well-tolerated. Common side effects are mild and may include headache, nausea, or stomach discomfort.

Most patients can safely use cold sore antivirals alongside other medications. Always inform your healthcare provider about all current medications to check for any possible interactions.

Cold sores are caused by HSV-1 and appear outside the mouth (usually on the lips), while canker sores are non-contagious ulcers that develop inside the mouth.

Yes. Prescription antivirals require a licensed provider to evaluate your symptoms and issue a prescription.

Yes. Cold sores are contagious, especially when blisters are present. Avoid direct contact, kissing, or sharing utensils during an outbreak.

Joepill.com offers fast, private online consultations with licensed providers. Get evaluated and receive your cold sore prescription quickly, without needing an office visit.