Dosage & Side Effects


The regular dosage of Valtrex is 1000mg per day. Take Valtrex right as it was prescribed for you by your doctor. Don’t take it in larger portions, or take it for longer period than what was recommended by your physician. Strictly follow the instructions on your prescription blank.

Treatment with Valtrex has to be started as soon as possible, after the first herpes symptoms (tingling, blisters, burning) appear. This medicine may not be as efficient, in case you first start using it one or two days after your symptoms’ appearance.

Take every dose with a full glass of water. Drink a lot of water during the taking of Valtrex in order to support proper functioning of your kidneys. Shake the oral suspension properly right before measuring a dose. To make sure you get the right portion, measure the suspension with a measuring spoon or medical cup, instead of doing it with a usual table spoon. You should ask you pharmacist for a dose-measuring spoon/cup, in case you don’t have it.

Use this drug for the entire period prescribed by your physician. Your symptoms can get better before the treatment is complete. Valtrex won’t treat a common disease, like flu or cold. Damages induced by herpes viruses have to be kept as dry and clean as possible. Wearing loose clothes could help preventing the damages’ irritation.

Valtrex pills should be stored at room temperature, far from heat and dampness. Valtrex suspension should be stored in a refrigerator, but not frozen. Any Valtrex older than 28 days should be thrown away.

Things you should avoid during the use of Valtrex?

As it was mentioned before, herpes infections can be passed to other people even during the use of Valtrex. Therefore, you should avoid having sex, or if you do have it, make sure to use a latex condom to prevent the infection’s spreading. Also, make sure that you cover the damaged areas of your body to not let other people contact them. Don’t touch your eyes after touching the infected area. Remember to wash your hands often in order to not pass the disease to other people.

Side Effects of Valtrex

You should immediately call for emergency medical assistance in case of any allergic reaction signs, including

  • breathing troubles,
  • hives,
  • face swelling,
  • lip swelling,
  • tongue swelling,
  • or throat swelling.

Stop using Valtrex and contact your physician immediately, if you experience any of the following signs of severe side effects, which may damage red blood cells:

  • fever,
  • easy bleeding or bruising;
  • red spots on the skin;
  • retching,
  • bloody diarrhea;
  • yellow or pale skin;
  • fainting or weakness;
  • rare or complete absence of miction.

Contact your physician immediately, if you experience any of the following side effects:

  • lower back pain;
  • somnolence,
  • mood alterations,
  • increased thirst,
  • appetite loss,
  • retching,
  • nausea;
  • weigh gain,
  • swelling,
  • lack of air;
  • aggression,
  • confusion,
  • disturbance,
  • hallucinations,
  • concentration troubles;
  • shakiness or unsteadiness;
  • vision or speech problems;
  • seizures.

Other, less severe, Valtrex side effects can involve:

  • stomach pain,
  • nausea;
  • dizziness,
  • headache,
  • feeling of tiredness,
  • depression;
  • articulation pains;
  • menstrual pains;
  • light skin rash;
  • sore throat or stuffy nose.

This isn’t a complete side effect list, so other side effects can occur as well. Contact your doctor and tell about any bothering or unusual side effects.