Uses
The antiviral medication soothes cold sores and offers relief from the same, giving the patient the ability to cope with the pain and discomfort. The applications are always scheduled by the doctor on the basis of the study, on how quickly the medication gets absorbed and the type of skin of the patient; dry, oily or otherwise.

Application
You should not apply Penciclovir or Denavir inside the nose or in or near the eyes. This may result in irritation. The treatment with Penciclovir or Denavir should begin as soon as the sores are identified, on the affected area only and as per the doctor's instructions. Use Denavir exactly as directed. It should be applied to the cold sore lesions every 2 hours for a period of four days. Denavir should be used to treat cold sores on the lips and face only.

Side effects
There are no serious side effects reported with the use of Denavir. The less serious side effects that may occur include headache and local numbness where the cream is applied. In case you identify any side effects other than those listed, you need to consult the doctor.

Precautions
Denavir is unlikely to harm the unborn. However, you should not use Denavir during pregnancy without consulting the doctor. It is yet to be established whether Denavir passes into breast milk. However, you should not take a chance and it is very essential to consult the doctor in case you are breast feeding.

Denavir interactions
You should not use other topical medications to treat the same area, when Denavir is being used. No other applications or medicines are known to interact with Denavir. However, it is good to talk to your doctor before taking other medication, during treatment with Denavir.

Over application
An overdose of Denavir is not harmful. Just in case an excessive amount of the cream has been used or if the cream has been ingested by mistake, you need to contact your doctor as soon as possible. Do not attempt any self medication or corrective measures, as you may end up adding to your discomfort and the soreness already troubling you.

Missed dose
In the case of a missed application, you should continue the treatment as soon as you remember. You can skip the application scheduled earlier and move on to the next scheduled application. Anyhow, consult the doctor.

Storage
The drug needs to be stored at room temperature and away from moisture and heat. The medication needs to be kept away from the reach of children, especially teenagers, who are known to be very inquisitive and experimental by nature.