"Scientists at the National Institutes of Health report they have discovered in mouse studies that a small molecule released in the spinal cord triggers a process that is later experienced in the brain as the sensation of itch.
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Details with Side Effects
DENAVIR (penciclovir) cream 1% contains penciclovir, an antiviral agent active against herpes viruses. DENAVIR is available for topical administration as a 1% white cream. Each gram of DENAVIR contains 10 mg of penciclovir and the following inactive ingredients: cetostearyl alcohol, mineral oil, polyoxyl 20 cetostearyl ether, propylene glycol, purified water and white petrolatum. Chemically, penciclovir is known as 9-[4-hydroxy-3-(hydroxymethyl)butyl] guanine. Its molecular formula is C10H15N5O3; its molecular weight is 253.26. It is a synthetic acyclic guanine derivative and has the following structure:
Figure 1: Structural Formula of Penciclovir
Penciclovir is a white to pale yellow solid. At 20°C it has a solubility of 0.2 mg/mL in methanol, 1.3 mg/mL in propylene glycol, and 1.7 mg/mL in water. In aqueous buffer (pH 2) the solubility is 10.0 mg/mL. Penciclovir is not hygroscopic. Its partition coefficient in n-octanol/water at pH 7.5 is 0.024 (logP = -1.62).
What are the possible side effects of penciclovir topical (Denavir)?
Serious side effects have not been reported with the use of penciclovir topical.
Other less serious side effects may be more likely to occur. Continue to use penciclovir topical and talk to your doctor if you experience:
- local numbness or tingling where the cream is applied;
- changes in taste;
- rash; or
- irritation at the application site.
Side effects other than those listed here may also occur. Talk to your doctor about any side effect that seems unusual or that is especially bothersome. You may report side effects...
What are the precautions when taking penciclovir (Denavir)?
Before using penciclovir, tell your doctor or pharmacist if you are allergic to it; or to famciclovir; or if you have any other allergies. This product may contain inactive ingredients, which can cause allergic reactions or other problems. Talk to your pharmacist for more details.
Before using this medication, tell your doctor or pharmacist your medical history.
Tell your doctor if you are pregnant before using this medication. Discuss the risks and benefits with your doctor.
It is not known if this medication passes into breast milk. Consult your doctor before...
Last reviewed on RxList: 9/25/2013
This monograph has been modified to include the generic and brand name in many instances.
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