Precedex is used in adults to start or maintain sedation in people who are on a machine that helps with breathing (ventilator) in the intensive care unit (ICU).

Precedex is used in adults for sedation before and during surgery or a medical procedure.

Precedex is also used in children aged 1 months to less than 18 years of age for sedation before and during other medical procedures.

Precedex may also be used for purposes not listed in this medication guide.

Use only as directed. Tell your doctor if you use other medicines or have other medical conditions or allergies.

Precedex is injected into a vein by a healthcare provider.

Your breathing, heart rate, blood pressure, oxygen levels, and other vital signs will be watched closely during and after receiving Precedex.

Tell your doctor if you have or have ever had:

• diabetes;

• high blood pressure;

• a serious heart condition such as "AV block" (2nd or 3rd degree);

• a heart rhythm disorder;

• low blood pressure, if you are dehydrated; or

• liver disease.

It is not known if Precedex will harm an unborn baby. Tell your doctor if you are pregnant or plan to become pregnant.

If you are breastfeeding, tell your doctor if you notice irritability in the nursing baby.

In a medical setting you are not likely to miss a dose.

In a medical setting an overdose would be treated quickly.

Follow your doctor's instructions about any restrictions on food, beverages, or activity.

Get emergency medical help if you have signs of an allergic reaction: hives, difficult breathing, swelling of your face, lips, tongue, or throat.

Certain side effects may occur during the first 48 hours after receiving Precedex. Tell your medical caregivers at once if you have: weakness, confusion, feeling nervous or agitated, increased sweating, weight loss, stomach pain, diarrhea, constipation, craving salty foods, dizziness, feeling light-head, and headache.

Precedex may cause serious side effects. Call your doctor at once if you have:

• fever with shortness of breath or rapid breathing.

Common side effects of Precedex may include:

• slow heartbeats;

• low blood pressure;

• dry mouth; or

• nausea, vomiting, and agitation.

Some side effects are more common in children receiving Precedex such as slow breathing, high blood pressure.

This is not a complete list of side effects and others may occur. Call your doctor for medical advice about side effects. You may report side effects to FDA at 1-800-FDA-1088.

Using Precedex with other drugs that make you drowsy can worsen this effect. Ask your doctor before using opioid medication, a sleeping pill, a muscle relaxer, or medicine for anxiety or seizures.

Other drugs may affect Precedex, including prescription and over-the-counter medicines, vitamins, and herbal products. Tell your doctor about all other medicines you use.