Numorphan Side Effects

Generic Name: oxymorphone

Note: This page contains side effects data for the generic drug oxymorphone. It is possible that some of the dosage forms included below may not apply to the brand name Numorphan.

It is possible that some side effects of Numorphan may not have been reported. These can be reported to the FDA here. Always consult a healthcare professional for medical advice.

For the Consumer

Applies to oxymorphone: oral tablet, oral tablet extended release

Other dosage forms:

As well as its needed effects, oxymorphone (the active ingredient contained in Numorphan) may cause unwanted side effects that require medical attention.

If any of the following side effects occur while taking oxymorphone, check with your doctor immediately:

Less common
  • Blurred vision
  • confusion
  • decreased urination
  • difficult or labored breathing
  • dizziness, faintness, or lightheadedness when getting up suddenly from a lying or sitting position
  • dry mouth
  • fast, pounding, racing, or irregular heartbeat or pulse
  • headache
  • nervousness
  • pounding in the ears
  • rapid breathing
  • sunken eyes
  • sweating
  • swelling of the hands, ankles, or feet
  • thirst
  • tightness in the chest
  • unusual tiredness or weakness
  • wrinkled skin
Rare
  • Abdominal or stomach pain
  • chest pain or discomfort
  • chills
  • cold sweats
  • cough
  • decrease in consciousness
  • decrease in urine volume
  • difficulty in passing urine (dribbling)
  • difficulty with sleeping
  • difficulty with swallowing
  • disorientation
  • drowsiness to profound coma
  • fever
  • hallucination
  • hives, itching, or skin rash
  • hyperventilation
  • hoarseness
  • irregular, slow, or shallow breathing
  • irritability
  • irritation
  • joint pain, stiffness, or swelling
  • lethargy
  • painful urination
  • pale or blue lips, fingernails, or skin
  • puffiness or swelling of the eyelids or around the eyes, face, lips, or tongue
  • redness of the skin
  • restlessness
  • severe constipation
  • severe vomiting
  • shaking
  • trouble in holding or releasing urine

If any of the following symptoms of overdose occur while taking oxymorphone, get emergency help immediately:

Symptoms of overdose
  • Cold and clammy skin
  • constricted, pinpoint, or small pupils (black part of the eye)
  • decreased awareness or responsiveness
  • muscle weakness
  • no blood pressure or pulse
  • not breathing
  • severe sleepiness or unusual drowsiness
  • stopping of heart

Some oxymorphone side effects may not need any medical attention. As your body gets used to the medicine these side effects may disappear. Your health care professional may be able to help you prevent or reduce these side effects, but do check with them if any of the following side effects continue, or if you are concerned about them:

More common
  • Difficulty having a bowel movement (stool)
  • feeling of constant movement of self or surroundings
  • increased sweating
  • nausea or vomiting
  • relaxed and calm
  • sensation of spinning
  • sleepiness
Less common
  • Acid or sour stomach
  • belching
  • decreased appetite
  • decreased weight
  • diarrhea
  • discouragement
  • excess air or gas in the stomach or intestines
  • feeling of warmth
  • feeling sad or empty
  • full or bloated feeling
  • heartburn
  • indigestion
  • lack of appetite
  • loss of interest or pleasure
  • passing gas
  • pressure in the stomach
  • redness of the face, neck, arms, and occasionally, upper chest
  • stomach discomfort or upset
  • swelling of the abdominal or stomach area
  • tiredness
  • trouble concentrating
Rare
  • Blistering, crusting, irritation, itching, or reddening of the skin
  • cracked, dry, scaly skin
  • difficulty with thinking or concentrating
  • disturbed color perception
  • double vision
  • false or unusual sense of well-being
  • feeling jittery
  • halos around lights
  • loss of vision
  • mental depression
  • night blindness
  • nightmares or unusually vivid dreams
  • overbright appearance of lights
  • sudden sweating
  • tunnel vision
  • welts

For Healthcare Professionals

Applies to oxymorphone: injectable solution, oral tablet, oral tablet extended release, rectal suppository

Nervous system

Nervous system side effects have included drowsiness, sedation, lightheadedness, unusual tiredness, weakness, headache, dysphoria, dizziness, mental impairment, CNS depression, euphoria, miosis, diplopia, blurred vision, nervousness, restlessness, confusion, mental clouding, trouble sleeping, paradoxical CNS stimulation, hallucinations, and mental depression.

Gastrointestinal

Gastrointestinal side effects have included nausea, vomiting, dry mouth, constipation, biliary tract spasm, cramps or pain, loss of appetite, paralytic ileus, and toxic megacolon in patients with inflammatory bowel disease.

Cardiovascular

Cardiovascular side effects have included hypotension, orthostatic hypotension (particularly in ambulatory patients), tachycardia, bradycardia, palpitations, and flushing.

Respiratory

Respiratory side effects have included respiratory depression, atelectasis, allergic bronchospastic reaction, allergic laryngeal edema, apnea and allergic laryngospasm.

Genitourinary

Genitourinary side effects have included ureteral spasm, urinary retention or hesitancy, and antidiuretic effect.

Dermatologic

Dermatologic side effects have included sweating.

Hypersensitivity

Hypersensitivity side effects have included allergic dermatitis, urticaria, skin rash, hives and/or itching, and swelling of the face.

Other

Other side effects have included tolerance, psychological dependence, and physical dependence.

Ocular

Ocular side effects including miosis, diplopia, and blurred vision have been reported.

General

General side effects including fatigue and asthenia have been reported.

Local

Local side effects including injection site reactions have been reported with the use of oxymorphone (the active ingredient contained in Numorphan) injection.

Hepatic

Hepatic side effects including biliary colic have been reported.

Renal

Renal side effects including ureteral spasm, urinary hesitation, urinary retention, and oliguria have been reported.

Disclaimer: Every effort has been made to ensure that the information provided is accurate, up-to-date and complete, but no guarantee is made to that effect. In addition, the drug information contained herein may be time sensitive and should not be utilized as a reference resource beyond the date hereof. This material does not endorse drugs, diagnose patients, or recommend therapy. This information is a reference resource designed as supplement to, and not a substitute for, the expertise, skill , knowledge, and judgement of healthcare practitioners in patient care. The absence of a warning for a given drug or combination thereof in no way should be construed to indicate safety, effectiveness, or appropriateness for any given patient. Drugs.com does not assume any responsibility for any aspect of healthcare administered with the aid of materials provided. The information contained herein is not intended to cover all possible uses, directions, precautions, warnings, drug interactions, allergic reactions, or adverse effects. If you have questions about the substances you are taking, check with your doctor, nurse, or pharmacist.

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