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Phenylephrine (Intravenous route)

Pronunciation:

fen-il-EF-rin

Brand Names:

  • Vazculep

Dosage Forms:

  • Solution

Classifications:

Therapeutic—

Vasopressor

Pharmacologic—

Sympathomimetic

Chemical—

Alkylarylamine

Uses of This Medicine:

Phenylephrine injection is used to treat hypotension (low blood pressure) that may occur during surgery.

This medicine is to be given only by or under the direct supervision of your doctor.

Before Using This Medicine:

In deciding to use a medicine, the risks of taking the medicine must be weighed against the good it will do. This is a decision you and your doctor will make. For this medicine, the following should be considered:

Allergies—

Tell your doctor if you have ever had any unusual or allergic reaction to this medicine or any other medicines. Also tell your health care professional if you have any other types of allergies, such as to foods, dyes, preservatives, or animals. For non-prescription products, read the label or package ingredients carefully.

Children—

Appropriate studies have not been performed on the relationship of age to the effects of phenylephrine injection in the pediatric population. Safety and efficacy have not been established.

Older adults—

Appropriate studies performed to date have not demonstrated geriatric-specific problems that would limit the usefulness of phenylephrine injection in the elderly. However, elderly patients are more likely to have kidney, liver, or heart problems, which may require caution and an adjustment in the dose for patients receiving phenylephrine injection.

Pregnancy—

Pregnancy CategoryExplanation
All TrimestersCAnimal studies have shown an adverse effect and there are no adequate studies in pregnant women OR no animal studies have been conducted and there are no adequate studies in pregnant women.

Breast-feeding—

There are no adequate studies in women for determining infant risk when using this medication during breastfeeding. Weigh the potential benefits against the potential risks before taking this medication while breastfeeding.

Other medicines—

Although certain medicines should not be used together at all, in other cases two different medicines may be used together even if an interaction might occur. In these cases, your doctor may want to change the dose, or other precautions may be necessary. When you are receiving this medicine, it is especially important that your healthcare professional know if you are taking any of the medicines listed below. The following interactions have been selected on the basis of their potential significance and are not necessarily all-inclusive.

Using this medicine with any of the following medicines is not recommended. Your doctor may decide not to treat you with this medication or change some of the other medicines you take.

  • Linezolid
  • Rasagiline
  • Selegiline

Using this medicine with any of the following medicines is usually not recommended, but may be required in some cases. If both medicines are prescribed together, your doctor may change the dose or how often you use one or both of the medicines.

  • Amitriptyline
  • Amoxapine
  • Clomipramine
  • Desipramine
  • Dothiepin
  • Doxepin
  • Imipramine
  • Iobenguane I 123
  • Lofepramine
  • Midodrine
  • Nortriptyline
  • Opipramol
  • Protriptyline
  • Trimipramine

Other interactions—

Certain medicines should not be used at or around the time of eating food or eating certain types of food since interactions may occur. Using alcohol or tobacco with certain medicines may also cause interactions to occur. The following interactions have been selected on the basis of their potential significance and are not necessarily all-inclusive.

Other medical problems—

The presence of other medical problems may affect the use of this medicine. Make sure you tell your doctor if you have any other medical problems, especially:

  • Allergy to sulfites or
  • Asthma—This medicine contains sodium metabisulfite, which can make these conditions worse.
  • Angina, or history of or
  • Bradycardia (slow heartbeat) or
  • Blood vessel problems (eg, arteriosclerosis), severe or
  • Heart failure or
  • Peripheral vascular disease or
  • Pulmonary arterial hypertension or
  • Spinal cord injury—Use with caution. May make these conditions worse.
  • Kidney disease, severe or
  • Liver disease—Use with caution. The effects may be increased because of slower removal of the medicine from the body.

Proper Use of This Medicine:

A nurse or other trained health professional will give you this medicine in a hospital. This medicine is given through a needle placed in one of your veins.

Precautions While Using This Medicine:

Your doctor will check your progress closely while you are receiving this medicine. This will allow your doctor to see if the medicine is working properly and to decide if you should continue to receive it. Blood tests may be needed to check for unwanted effects.

This medicine may cause a permanent depression (necrosis) under the skin at the injection site. Tell your doctor right away if you notice any of these side effects at the injection site: depressed or indented skin, blue-green to black skin discoloration, or pain, redness, or sloughing (peeling) of the skin.

Do not take other medicines unless they have been discussed with your doctor. This includes prescription or nonprescription (over-the-counter [OTC]) medicines and herbal or vitamin supplements.

Side Effects of This Medicine:

Along with its needed effects, a medicine may cause some unwanted effects. Although not all of these side effects may occur, if they do occur they may need medical attention.

Check with your doctor or nurse immediately if any of the following side effects occur:

Incidence not known
Blurred vision
chest pain or discomfort
difficult or labored breathing
dizziness
fainting
fast, slow, or irregular heartbeat
headache
nausea or vomiting
nervousness
pain in the shoulders, arms, jaw, or neck
pounding in the ears
sweating
tightness in the chest
unusual tiredness

Get emergency help immediately if any of the following symptoms of overdose occur:

Symptoms of overdose
Feeling of fullness in the head
pounding or rapid pulse
tingling in the arms or legs
vomiting

Some side effects may occur that usually do not need medical attention. These side effects may go away during treatment as your body adjusts to the medicine. Also, your health care professional may be able to tell you about ways to prevent or reduce some of these side effects. Check with your health care professional if any of the following side effects continue or are bothersome or if you have any questions about them:

Incidence not known
Heartburn
itching skin
nausea
pain in the neck
pain or discomfort in chest, upper stomach, or throat

Other side effects not listed may also occur in some patients. If you notice any other effects, check with your healthcare professional.

Call your doctor for medical advice about side effects. You may report side effects to the FDA at 1-800-FDA-1088.


Last Updated: 9/4/2017
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