Edoxudine

Edoxudine Uses, Dosage, Side Effects, Food Interaction and all others data.

Edoxudine is a deoxythymidine analog with activity against herpes simplex virus. It is a potent and selective inhibitor of herpes simplex virus type 1 and 2. The obtained product is an antiviral ointment. The activity of edoxudine against herpes simplex virus was first recognized in 1967. It was later recognized to be effective in vivo in a preclinical model of keratitis caused by herpes virus. It was developed by McNeil Pharmaceutical and approved by Health Canada on December 31, 1992. This medication was later discontinued from the market in 1998.

In reports, it has been indicated that at antivirally active doses, edoxudine is phosphorylated to a much greater extent by hepatitis-infected cells when compared to mock-infected cells. Once phosphorylated, edoxudine is more highly incorporated into viral DNA than cellular DNA. The level of incorporation into viral DNA highly seems to be correlated with the concentration of edoxudine. The suppression of viral DNA synthesis caused a shutoff of viral replication and the viral titration is significantly reduced.The effect of edoxudine is also proven to reduce significantly the lesion area produced by the viral activity to an even 44% reduction.

Edoxudine
Uses
Dosage
Side Effect
Precautions
Interactions
Uses during Pregnancy
Uses during Breastfeeding
Accute Overdose
Food Interaction
Half Life
Volume of Distribution
Clearance
Interaction With other Medicine
Contradiction
Storage

Trade Name	Edoxudine
Generic	Edoxudine
Edoxudine Other Names	Edoxudine
Type
Formula	C₁₁H₁₆N₂O₅
Weight	Average: 256.258 Monoisotopic: 256.105921623
Protein binding	The plasma protein binding of edoxudine is very low and it is reported to be of about 7%. It is mainly found in a bound state to albumin.
Groups	Approved, Investigational, Withdrawn
Therapeutic Class
Manufacturer
Available Country
Last Updated:	September 19, 2023 at 7:00 am

Uses

Edoxudine is a deoxythymidine analog used to treat herpetic keratitis.

Edoxudine was used in Europe, in the form of a topical antiviral, for the treatment of human herpes keratitis. Human herpes keratitis is an inflammation of the cornea in the eye caused by herpes simplex virus infection. This infection is a cause of significant morbidity whose incidence is significantly increased in the presence of recurrent infection and it can even produce corneal blindness.

Edoxudine 3% cream was also indicated for the treatment of dermal herpes simplex virus. This virus can produce an infection ubiquitously and it is highly contagious. There are two types of herpes virus, type 1 that is mainly transmitted by oral-to-oral contact and type 2 that is sexually transmitted.

How Edoxudine works

Edoxudine is a potent inhibitor of the replication of herpes simplex virus type 1 and 2. For the activation of this drug, the action of viral thymidine kinase is required to phosphorylate this molecule in order to form the 5'-monophosphate derivative. Then, it is needed to be further phosphorylated by cellular enzymes until the formation of the 5'-triphosphate derivative which is a competitive inhibitor of the viral-coded DNA polymerase. The advantage of edoxudine is that it is highly selective, this characteristic can be seen by its preferential phosphorylation in herpes-infected cells and its preferential incorporation into viral DNA.

Toxicity

Edoxudine is been reported to present cytotoxic effects and some degree of DNA incorporation in human leukemic cells and PHA-stimulated lymphocytes in vitro.

Volume of Distribution

This pharmacokinetic property is not available.

Elimination Route

Edoxudine cream is able to penetrate the skin in a very rapid manner. This easy penetration allows edoxudine to have a greater activity when compared with other topical antivirals that have better antiviral activity in vitro. In preclinical trials in mice, after intravenous administration of edoxudine, the mean residence time was 25 min. Edoxudine presented a bioavailability of 49% with a Cmax and tmax of 2.4 mcg/g and 31.1 min respectively. The AUC in plasma of edoxudine is significantly higher when administered orally when compared with intravenous administration.

Half Life

In preclinical trials on mice, after intravenous administration, edoxudine presented a very short distribution half-life of 1.4 min. In the same trials, the elimination half-life was reported to be of 24.1 min.