Valtrex - Uses, Side Effects, Warnings, and More

Valtrex – Uses, Side Effects, Warnings, and More

Valtrex – Uses, Side Effects, Warnings, and More

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The antiviral medication valacyclovir is prescribed to patients who have infections brought on by specific viruses. In youngsters, it is employed in the treatment of both chickenpox and cold sores around the mouth, both of which are caused by herpes simplex (caused by varicella zoster). In adults, it is employed in the treatment of shingles, which are brought on by herpes zoster, as well as cold sores located around the mouth.

In some cases, the onset of genital herpes can also be treated with valacyclovir. This drug is given to patients who experience recurrent breakouts so that a lower number of future episodes can be expected. Antiviral medication is called valacyclovir. It inhibits the reproduction of a number of viruses. On the other hand, it is not a treatment that can heal these infections.

Even when there is no symptoms present, the viruses that cause these diseases can still be found living in the body. The duration and intensity of these outbreaks can be lessened by using valacyclovir. It makes the sores heal more quickly, prevents new sores from appearing, and reduces the discomfort and itching associated with the sores. This medicine might also assist shorten the duration of the pain that is experienced after the sores have healed.

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Valtrex: How to Take It

Before beginning treatment with valacyclovir and whenever you get a refill, make sure to read the Patient Information Leaflet, which should be provided by your pharmacist if one is available. If you have any questions, you should consult with either your physician or your pharmacist.

Valacyclovir should be taken orally, either with or without food, as prescribed by your healthcare provider. While you are taking this medicine, it is important to consume a lot of fluids in order to minimise your risk of experiencing negative effects.

Your specific type of infection, current health status, and how well you respond to treatment will determine the dosage, as well as the period of treatment. When administering medication to children for the treatment of chickenpox, the dosage is also determined by the child’s weight.

The most effective use of this medicine is when it is initiated at the earliest possible stage of an outbreak, as prescribed by your attending physician. If you put off therapy for too long, it may not be as effective. Start taking valacyclovir for shingles or chickenpox at the first sign of a symptom, or as soon as possible after the rash begins, whichever comes first. If you are concerned that you may have genital herpes or cold sores, you should start taking this medicine as soon as you notice any tingling, itching, or burning sensations.

When taking valacyclovir, it is important to maintain a steady dose of the medication in your body so that it can act effectively. Take this medication at regular intervals that are spaced out equally. Take it at the same time(s) every day so that you won’t forget when to take it.

Take this medication as directed until the complete dose that was recommended to you has been consumed. Without first seeing your physician, do not alter the dosage you are taking, skip any doses, or stop taking this medication before it is fully finished.

If your situation does not improve or if it gets worse, you should consult your doctor.

Side Effects

There is a possibility that you will have nausea, stomach pain, headache, or dizziness. Notify your doctor or pharmacist as soon as possible if any of these side effects continue or become worse.

Keep in mind that the reason your doctor has recommended that you take this medication is that he or she believes that the potential benefits to you outweigh the potential risks of doing so. The majority of persons who take this medicine do not report experiencing any severe adverse effects.

Notify your physician as soon as possible if you experience any serious side effects, such as changes in your mental state or mood (such as agitation, disorientation, or hallucinations), difficulty speaking, shaky or unsteady movements, or evidence of kidney issues (such as a change in the amount of urine).

There is a remote possibility that this prescription could induce a condition that is potentially fatal that affects the kidneys, blood cells, and other organs and tissues of the body. If you have illnesses that are associated with a weaker immune system, you have an increased risk of developing this ailment (such as HIV disease, bone marrow transplant, kidney transplant). In the event that you experience any serious adverse effects, such as severe fatigue, a slow, fast, or irregular heartbeat, easy bruising or bleeding, a new fever, bloody or dark urine, severe stomach or abdominal pain, yellowing eyes or skin, sudden changes in vision, loss of consciousness, or seizures, you should seek immediate medical attention.

It is quite unusual for this medicine to cause an extremely severe allergic reaction. However, you should seek immediate medical attention if you detect any symptoms of a significant allergic reaction, such as a rash, itching/swelling (particularly of the face/tongue/throat), extreme dizziness, or difficulty breathing. These symptoms may indicate anaphylaxis.

This list of potential adverse effects is not exhaustive in any way. Please consult your physician or pharmacist if you have any side effects that are not listed above.

In the United States, if you are experiencing any adverse effects, please consult your primary care physician. You can call the FDA at 1-800-FDA-1088 or visit their website at to report any adverse effects.

In Canada, if you are experiencing any adverse effects, please consult your primary care physician. You can call Health Canada at 1-866-234-2345 to report any adverse effects you experience.

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Tell your doctor or pharmacist if you are allergic to valacyclovir, or to acyclovir, or if you have any other allergies before beginning treatment with valacyclovir. There is a possibility that this product contains inactive substances, which, if present, could result in allergic responses or other complications. Discuss the matter further with your pharmacist for further information.

Inform your doctor or pharmacist of your complete medical history before beginning treatment with this drug, especially if you have a history of renal issues.

This medication may on occasion cause you to feel lightheaded. Alcohol or marijuana (cannabis) can make you more dizzy. Do not get behind the wheel of a vehicle, operate any machinery, or engage in any activity that requires attentiveness until you are able to do it safely. Reduce your intake of alcoholic beverages. If you are a marijuana user, you should consult your primary care physician (cannabis).

Before undergoing surgery, it is important to discuss all of the products you use with your dentist or doctor (including prescription drugs, nonprescription drugs, and herbal products).

Without first receiving your physician’s approval, you should not have some immunizations or vaccinations (such those that protect against the varicella virus, for example).

The mental and emotional adverse effects of this medication, including changes in behaviour (such disorientation and agitation), as well as problems with the kidneys, may be more severe in elderly patients (such as a change in the amount of urine).

It’s very easy for cold sores to spread. When you have cold sores, it is important to steer clear of any close physical contact with other people, including kissing, until the sores have completely healed. Make every effort to avoid touching the cold sore. In that case, make sure to wash your hands afterward.

There is no evidence that valacyclovir can stop the transmission of herpes. If you want to reduce the likelihood of passing genital herpes on to your partner, you should avoid having sexual contact while you are experiencing an outbreak or if you are experiencing symptoms. Even if you do not have any signs of genital herpes, you might still pass it on to others. Always use an effective barrier device (dental dams or condoms made of latex or polyurethane) if you are engaging in sexual activity. Consult your doctor or pharmacist for more details.

During pregnancy, it is important to only use this drug when it is absolutely necessary. Talk to your healthcare provider about the potential drawbacks and advantages.

This medicine does get into breast milk, but it is highly unlikely that it may affect an infant who is being breastfed. Before starting to breastfeed, you should talk to your healthcare provider.


Interactions between drugs might alter the way in which they perform or raise the possibility that you will have major adverse effects. This paper does not include all of the potential medication interactions that could occur. Maintain a list of all the goods you use, including prescription and over-the-counter medications, as well as herbal remedies, and give it to both your primary care physician and your pharmacist. Without first consulting your physician, you should never alter the dosage of any medication, stop taking any medication, or start taking any new medication.

Other medications that could potentially lead to renal problems are examples of goods that could potentially interact with this medication (including nonsteroidal anti-inflammatory drugs-NSAIDs such as ibuprofen, naproxen).

The antiviral medication valacyclovir is quite comparable to acyclovir. While you are using valacyclovir, you should not take any drugs that contain acyclovir.


Dial 911 if you suspect that someone has overdosed and they are exhibiting serious symptoms such as passing out or having problems breathing. In any other case, you should immediately contact a poison control centre. To reach the poison control centre for your area in the United States, dial 1-800-222-1222. Canada residents can call a provincial poison control centre. A change in the amount of urine that is passed, extreme weariness, shifts in mental state or mood, loss of consciousness, and seizures are all possible symptoms of an overdose.


This drug should not be given to anyone else.

This drug has been given to you specifically for the treatment of your current condition. If you have another illness in the future, you should not use it unless your doctor tells you to.

Neglected Dose

If you forget to take a dose, you should take it as soon as you realise you forgot. If it is getting close to the time of the next dose, you should forgo the dose that you missed. Your next dose should be taken at the typical time. It is not necessary to double the dose in order to catch up.


Keep at room temperature and away from light and moisture. Store at room temperature. Keep away from the bathroom at all costs. Always make sure that children and animals are kept well away from any medications.

Unless you have been specifically told to do so, you should not flush drugs down the toilet or pour them down a drain. When it is no longer needed or has passed its expiration date, dispose of this product in the appropriate manner. Talk to your neighbourhood pharmacy or the firm that handles garbage disposal in your area.

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