A child weighing more than 88 pounds should take the adult dose. The safety and effectiveness of oral Zovirax have not been established in children under 2 years of age. However, your doctor may decide that the benefits of this medication outweigh the potential risks. The safety and effectiveness of Zovirax ointment in children have not been established. Your doctor will start you at the low end of the dosage range, since older adults are more apt to have kidney problems or other disease, or to be taking other medications.
Any medication taken in excess can have serious consequences.
If you suspect an overdose, seek medical attention immediately.