Although nephrotoxicity due to rapid intravenous infusion of valacyclovir at high doses is not a rare side effect, oral single doses associated acute renal injury is an uncommon complication.
Can Valtrex cause kidney problems?
Valacyclovir hydrochloride is a prodrug and can be rapidly converted into acyclovir in vivo (1–3). In addition to neurotoxicity, acute kidney injury is a well-described side effect of acyclovir administration, since crystal deposition may lead to the development of renal failure.
Does valacyclovir affect kidney function?
Background: Drug-related acute kidney disease is a common side effect of valacyclovir (VACV) treatment.
Is Valtrex safe for kidneys?
Valtrex can be harmful to the kidneys, and these effects are increased when it is used together with other medicines that can harm the kidneys. Tell your doctor about all other medications you are using. You may need dose adjustments or special tests when taking certain medications together with Valtrex.Is acyclovir hard on kidneys?
Although the drug is well tolerated, severe nephrotoxicity, which often leads to acute renal failure, has been observed in patients [4, 7]. Acyclovir-induced renal failure occurs in approximately 12–48 % of cases [4].
Does valacyclovir have bad side effects?
Many people using this medication do not have serious side effects. Tell your doctor right away if you have any serious side effects, including: mental/mood changes (such as agitation, confusion, hallucinations), trouble speaking, shaky/unsteady movements, change in the amount of urine.
Are antivirals hard on the kidneys?
Antiviral drugs cause renal failure through a variety of mechanisms. Direct renal tubular toxicity has been described with a number of new medications with unique effects on epithelial cells of the kidney. These include cidofovir, adefovir dipivoxil, and tenofovir, as well as acyclovir.
What are the long term side effects of valacyclovir?
Another potential long-term side effect of valacyclovir usage is HUS/TTP, or hemolytic-uremic syndrome and thrombotic thrombocytopenic purpura. These similar disorders can lead to the destruction of red blood cells and a low platelet count, preventing your blood’s ability to clot.Who Cannot take Valtrex?
Age restrictions. If you are over the age of 65, it’s best to consult with your doctor before taking Valtrex. Elderly adults may have a higher risk of experiencing side effects and are more likely to have kidney problems because of it. This doesn’t mean that you can’t take Valtrex over the age of 65.
Can acyclovir cause kidney stones?Medicines that actually make stones Some medicines will result in your body making kidney stones. These include: Potassium-sparing diuretics, such as triamterene. Antivirals, such as acyclovir.
Article first time published onWhat should I avoid while taking valacyclovir?
What drugs and food should I avoid while taking Valtrex (Valacyclovir)? Avoid sexual intercourse or use a latex condom to help keep you from spreading the herpes virus to others. Avoid letting infected areas come into contact with other people. Avoid touching an infected area and then touching your eyes.
Is it safe to take valacyclovir everyday?
To help clear up your infection, keep taking valacyclovir for the full time of treatment, even if your symptoms begin to clear up after a few days. Do not miss any doses. However, do not use this medicine more often or for a longer time than your doctor ordered.
Which works better acyclovir or valacyclovir?
Valacyclovir (Valtrex) and acyclovir (Zovirax) are antiviral drugs that work by interfering with viral DNA replication. Both drugs target the same viruses but valacyclovir provides longer duration of action, therefore, doses can be taken fewer times every day – this is the only real advantage.
What is the difference between valacyclovir and acyclovir?
Acyclovir is similar to a nucleoside called guanosine, and can replace it in DNA. Once acyclovir replaces guanosine, DNA replication of the virus stops. Valacyclovir is a pro-drug for valacyclovir, meaning that it is turned into acyclovir in the body.
What medications should be avoided with kidney disease?
- Pain medications also known as nonsteroidal anti-inflammatory drugs (NSAIDs) …
- Proton pump inhibitors (PPIs) …
- Cholesterol medications (statins) …
- Antibiotic medications. …
- Diabetes medications. …
- Antacids. …
- Herbal supplements and vitamins. …
- Contrast dye.
Which medications can cause kidney damage?
- Antibiotics. …
- Some blood pressure medicines. …
- Medicines used for cancer treatment (chemotherapy). …
- Dyes (contrast media). …
- Illegal drugs. …
- Medicines used to treat HIV. …
- Nonsteroidal anti-inflammatory drugs. …
- Ulcer medicines.
Do antivirals weaken immune system?
The inhibitory effects of antivirals on immune cells may contribute to the immune deterioration observed in patients following prolonged use of the drugs.
Does Valtrex suppress the immune system?
However, because they suppress the immune system, these medicines also suppress the ability of the body to fight infection. Valaciclovir is therefore given to people who have received an organ transplant, in order to help the body kill off any CMV virus.
Can valacyclovir cause high blood pressure?
Increased heart rate. High blood pressure (hypertension)
Can you take valacyclovir while breastfeeding?
Safe During Breastfeeding A small amount of oral valacyclovir will pass to baby during breastfeeding, but the American Academy of Pediatrics supports use of the drug while breastfeeding as no side effects have been reported.
Can Valtrex cause liver damage?
In Closing. Valacyclovir is not considered a liver toxic drug. With a Category D rating from LiverTox, it’s well behind common drugs such as aspirin in terms of liver injury risk. When taken at a normal dose, valacyclovir is highly unlikely to cause liver damage in individuals with normal liver health.
What medications interact with Valtrex?
- cimetidine.
- elvitegravir/cobicistat/emtricitabine/tenofovir DF.
- emtricitabine.
- tenofovir DF.
How long can you stay on valacyclovir?
Valacyclovir comes as a tablet to take by mouth. It is usually taken every 8 hours (three times a day) for 7 days to treat shingles. To treat genital herpes it is usually taken twice a day for 5 days.
Can you take acyclovir for years?
Nevertheless, we conclude that the use of oral acyclovir for more than 12 months provides substantial additional prevention against recurrence of ocular HSV. Our data suggest that long-term oral acyclovir use remains effective in decreasing the number of recurrences beyond 12 months.
How long does it take for Valtrex to get out of your system?
On its own, its half-life is approximately 30 minutes. However, once valacyclovir has converted into acyclovir, it has a half-life of 2.5 to 3.3 hours in people with normal renal function.
Does acyclovir affect GFR?
The results suggest that acyclovir does not affect the renal tubular handling of creatinine, and hence, the pronounced, transient increase in plasma creatinine is due to decreased GFR, and not to a spurious increase in plasma creatinine.
Is acyclovir hepatotoxic?
Hepatotoxicity. Despite widespread use, there is little evidence that acyclovir when given orally causes significant liver injury. Serum enzyme levels generally do not change during oral acyclovir therapy.
How is valacyclovir metabolized?
Valacyclovir is converted to acyclovir and L-valine by first-pass intestinal and/or hepatic metabolism. Acyclovir is converted to a small extent to inactive metabolites by aldehyde oxidase and by alcohol and aldehyde dehydrogenase. Neither valacyclovir nor acyclovir is metabolized by cytochrome P450 enzymes.
What is better for shingles acyclovir or Valtrex?
The intent-to-treat analysis (1,141 patients) showed that valaciclovir for 7 or 14 days significantly accelerated the resolution of herpes zoster-associated pain (P = 0.001 and P = 0.03, respectively) compared with acyclovir; median pain durations were 38 and 44 days, respectively, versus 51 days for acyclovir.
Can valacyclovir treat other viruses?
Valacyclovir is used to treat infections caused by herpes and varicella-zoster viruses, such as genital herpes, cold sores, shingles, and chickenpox. Active against herpesviridae including herpes simplex virus types 1 (HSV-1), 2 (HSV-2), and varicella-zoster virus (VZV), and cytomegalovirus.
How can I reduce the side effects of valacyclovir?
Take valacyclovir by mouth, with or without food, as directed by your doctor. Drink plenty of fluids while taking this medication to lower the chance of side effects.
