How Does Xerese Work?
Xerese is a prescription topical cream combining 5% acyclovir and 1% hydrocortisone, approved by the FDA for treating recurrent cold sores (herpes labialis) in adults and children 12 years and older. Acyclovir targets the herpes simplex virus by inhibiting viral DNA replication, while hydrocortisone reduces inflammation and itching.[1]
What Benefits Does It Offer Over Acyclovir Alone?
Clinical trials showed Xerese shortens healing time by about one day compared to placebo (median 4.3 days vs. 5.4 days). It also reduces pain, swelling, and blister duration more effectively than acyclovir cream alone, with patients reporting less discomfort during outbreaks.[1][2] The dual action addresses both viral replication and inflammatory symptoms simultaneously.
How Quickly Do People See Results?
Symptoms like pain and itching improve within 24-48 hours of starting treatment, faster than with antivirals alone. Full lesion healing typically occurs in 4-5 days when applied 5 times daily at the first sign of a cold sore (tingling or redness).[1]
Who Benefits Most from Xerese?
It's most effective for recurrent cold sores on the lips or face, reducing outbreak severity in immunocompetent patients. Those with frequent or painful episodes gain from the steroid component's anti-inflammatory relief, which plain acyclovir lacks.[2] Not for genital herpes or primary infections.
Any Added Advantages for Daily Use?
As a short-term treatment (up to 6 days), it minimizes steroid exposure risks while providing dual relief. Studies confirm better patient satisfaction scores for symptom control vs. monotherapy.[1]
[1]: FDA Label for Xerese
[2]: Medscape - Xerese Overview