Phenergan

Children

The usual dose of Phenergan tablets, syrup, or rectal suppositories is 12.5 to 25 milligrams taken twice a day.

NAUSEA AND VOMITING

The average dose of Phenergan for nausea and vomiting in children or adults is 25 milligrams. When oral medication cannot be tolerated, use the rectal suppository. Your doctor may have you take 12.5 to 25 milligrams every 4 to 6 hours, if necessary.

For nausea and vomiting in children, the dose is usually calculated at 0.5 milligram per pound of body weight and will also be based on the age of the child and the severity of the condition being treated. Phenergan and other anti-vomiting drugs should not be given to children if the cause of the problem is unknown.

INSOMNIA

Adults

The usual dose is 25 to 50 milligrams for nighttime sedation.

Children

The usual dose is 12.5 to 25 milligrams by tablets or rectal suppository at bedtime.

Older Adults

The dosage is usually reduced for people over 60.

Overdosage

Any medication taken in excess can have serious consequences. An overdose of Phenergan can be fatal. If you suspect an overdose, seek medical treatment immediately.

• Symptoms of Phenergan overdose may include:
  Difficulty breathing, dry mouth, fixed and dilated pupils, flushing, heightened reflexes, loss of consciousness, muscle tension, poor coordination, seizures, slowdown in brain activity, slowed heartbeat, stomach and intestinal problems, very low blood pressure, writhing movements

Children may become overstimulated and have nightmares. Older adults may also become overstimulated.