Valaciclovir (Valtrex) is an antiviral drug used for herpesvirus infections in adults and children. Medications can reduce symptoms, but they can also come with potential side effects. Understanding what effects to watch out for and how to manage them will help you use your medication effectively and safely. In this blog, we will discuss the common and serious side effects of valacyclovir and when you should see your doctor.
Valaciclovir Potential Side Effects You Should Know About
From common side effects to severe side effects, valacyclovir (Valtrex) can cause several reactions that you should be aware of.
common side effects
Valaciclovir (Valtrex) can cause common side effects that last several days or weeks but go away once your body gets used to the drug. If these symptoms become severe, last a long time, or are bothersome, seek medical attention. Common side effects include:
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abdominal pain
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snot
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headache
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nausea
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dizziness
mild side effects
These side effects are also temporary. However, if your symptoms become severe and you are concerned, please consult your doctor. Mild side effects include:
serious side effects
Valaciclovir can, in rare cases, cause severe side effects that require immediate medical attention.
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Kidney problems: Kidney damage can cause symptoms such as blood in the urine, swelling of the feet, ankles, and feet, weakness, and chest pain.
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Allergic side effects: Severe allergic reactions may occur with symptoms such as difficulty breathing, heart palpitations, severe rash, dizziness, and swelling of the face, lips, or throat.
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Severe skin reactions: Skin peeling or blistering may occur and may require immediate medical attention.
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Central nervous system problems: Symptoms may include agitation, difficulty speaking, tremors, confusion, and hallucinations, especially in older adults.
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Risk of depression: Symptoms may include changes in appetite or weight, trouble sleeping, fatigue, and lack of interest in activities.
Note: If severe side effects tend to be life-threatening, please call. 911 immediately.
Side effects of valacyclovir in children
clinical trial reported the following side effects of valacyclovir in children:
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diarrhea
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headache
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nausea
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heat
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dehydration
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snot
These reactions are mild and resolve on their own. If your child finds it bothersome and it persists for a long time, talk to your health care provider.
Precautions when using valacyclovir
When using valacyclovir, the following points should be kept in mind:
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Allergy to valacyclovir or acyclovir
the study It says people who are allergic to valacyclovir, acyclovir, or any of the ingredients in valacyclovir should avoid it.
People with severe renal impairment may require specific dosage adjustments or other treatments. Therefore, you should first consult your doctor.
People living with HIV/AIDS or receiving immunosuppressive therapy should discuss this with their doctor.
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History of bone marrow or kidney transplantation
Be sure to tell your doctor if you have had a bone marrow or kidney transplant to ensure the drug is safe to use.
People over the age of 65 are at higher risk of experiencing side effects and should contact their health care provider. On the other hand, it is not recommended for children under 12 years of age and should be avoided at all costs.
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If you are pregnant or breastfeeding
There is no evidence that valacyclovir can affect pregnancy or harm your baby, so consult your gynecologist before planning to use valacyclovir during pregnancy or breastfeeding.
Valaciclovir may interact with other drugs such as aspirin, Tylenol, Benadryl, Lexapro, Ozempic, Xanax, Zofran, Zoloft, and Zyrtec. Therefore, tell your doctor if you are currently taking any medications, as drug interactions can reduce the effectiveness of valacyclovir and increase your risk of side effects.
Tips for taking Valaciclovir safely to avoid side effects
Follow these tips to use valacyclovir effectively and safely and avoid the risk of side effects.
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Use exactly as prescribed: Follow your doctor’s instructions regarding dosage and schedule of your medication.
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Can be taken with or without food: If stomach upset occurs, take with food.
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Stay hydrated: Drink plenty of water to help your kidneys function properly.
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Complete the course: Do not stop taking your medicine without talking to your doctor.
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Be careful of side effects. Report any unusual symptoms such as kidney problems or swelling to your doctor.
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Discuss any medications you are currently taking: Be sure to let your doctor know about any medications you are taking to avoid interactions.
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Limit alcohol: Limit or avoid alcohol intake as it may worsen side effects.
What to do if you overdose or forget to take a dose
1. Overdose:
If you or someone else accidentally overdoses on valacyclovir, please call us. 911 or poison control (800-222-1222) immediately.
2. If you miss a dose:
Take the missed dose as soon as you remember, unless it is almost time for your next dose. In that case, please skip the part you forgot.
important: Never double your dose to make up for a missed dose.
When should I contact my health care provider?
It is important to seek medical attention if any of the following occur:
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Severe allergic reactions: difficulty breathing, rash, hives, and swelling of the face and throat.
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Kidney problems: Difficulty urinating, swelling of the legs, or little or no urine output.
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Mental changes: hallucinations, agitation, mood swings, or confusion.
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Severe stomach problems: persistent vomiting, nausea, or stomach pain.
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Feeling unusually weak or tired: You feel very weak or tired.
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Signs of infection: Ongoing sore throat, fever, or chills.
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Other concerning or unexpected symptoms: Serious and unusual symptoms that worry you.
final thoughts
Although valacyclovir is an effective treatment for herpesvirus infections, it can cause certain side effects. Valaciclovir’s potential side effects can range from the common (such as nausea, vomiting, and headaches) to severe reactions (such as kidney damage or allergic reactions). Common mild side effects resolve within a few days, but severe cases may require immediate medical attention.
It is important to always consult your doctor before starting treatment with valacyclovir, especially if you have any medical conditions or are taking other medications. Regular monitoring is also essential to reduce the risk of side effects and understand whether the drug is working as intended.
FAQ
Why drink lots of water with valacyclovir?
Proper hydration helps the kidneys function effectively and prevents kidney problems.
Can valacyclovir cause weight gain?
Yes, valacyclovir use can cause unexplained weight gain, especially in people with existing kidney problems.
Does valacyclovir have long-term side effects?
Yes, headaches, nausea, liver inflammation, or acute kidney failure can occur as long-term side effects and require immediate treatment.
Can valacyclovir cause hair loss?
No, there are no symptoms reported. However, there are rare cases where hair loss occurs without an exact reason.
Does valacyclovir contribute to liver-related side effects?
There are no reported cases. However, hepatotoxicity can occur, causing effects such as abdominal pain, itching, jaundice, and vomiting.