IMPORTANT: This is intended to supplement, not replace, the judgment of your doctor or pharmacist. It should not be assumed that the drug is appropriate or effective for you. Consult your doctor before using this drug. VALTREX (VAL-trex) BRAND NAME(S): Valtrex USES: This medication is used as an anti-viral agent for the treatment of shingles (herpes zoster) or genital herpes. HOW TO USE: Take orally as directed. Do not skip doses without your doctor's approval. SIDE EFFECTS: This drug may cause: dizziness, nausea, vomiting, headache, weakness, stomach pain, and loss of appetite as your body adjusts to the medication. If other symptoms persist, consult your doctor. PRECAUTIONS: Tell your doctor your entire medical history including: kidney disease, blood disorders, and any allergies. The elderly may be more sensitive to the effects of this drug. This medication should only be taken when absolutely necessary if pregnant.