Nucynta ER Side Effects

Generic Name: tapentadol

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

It is possible that some side effects of Nucynta ER 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 tapentadol: oral solution, oral tablet, oral tablet extended release

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

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

Less common
  • Bladder pain
  • bloody or cloudy urine
  • body aches or pain
  • chills
  • cough
  • difficult, burning, or painful urination
  • difficulty with breathing
  • fever
  • headache
  • loss of voice
  • lower back or side pain
  • muscle aches
  • unusual tiredness or weakness
  • Anxiety
  • being forgetful or confused
  • clumsiness or unsteadiness
  • convulsions
  • drowsiness
  • fast or irregular heartbeat
  • feeling drunk
  • irritability or restlessness
  • joint pain, stiffness, or swelling
  • pale or blue lips, fingernails, or skin
  • rash, hives, or itching
  • sensation of heaviness
  • shakiness or trembling
  • slurred speech
  • swelling of the eyelids, face, lips, hands, or feet
  • tightness in the chest
  • trouble with speaking or hoarseness
  • troubled breathing or swallowing
Incidence not known
  • Changes in behavior
  • dizziness
  • large, hive-like swelling on the face, eyelids, lips, tongue, throat, hands, legs, feet, or sex organs
  • puffiness or swelling of the eyelids or around the eyes, face, lips, or tongue
  • seeing, hearing, or feeling things that are not there
  • thoughts of killing oneself

Some tapentadol 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
  • Constipation
  • nausea
  • vomiting
Less common
  • Abnormal dreams
  • decreased appetite
  • difficulty with moving
  • heartburn or indigestion
  • increased sweating
  • muscle pain or stiffness
  • redness of the face, neck, arms, and occasionally, upper chest
  • stomach discomfort, upset, or pain
  • unusual drowsiness, dullness, tiredness, weakness, or feeling of sluggishness
  • Change in vision

For Healthcare Professionals

Applies to tapentadol: oral tablet, oral tablet extended release


Gastrointestinal side effects have included nausea, vomiting, constipation, dry mouth, dyspepsia, abdominal discomfort, impaired gastric emptying, and decreased appetite.

Nervous system

Nervous system side effects have included dizziness, somnolence, tremor, lethargy hypoesthesia, paresthesia, disturbance in attention, sedation, dysarthria, depressed level of consciousness, memory impairment, ataxia, presyncope, syncope, abnormal coordination, and seizures. Postmarketing reports have included headache.


Psychiatric side effects have included insomnia, confusional state, abnormal dreams, anxiety, irritability, drug withdrawal syndrome, feeling drunk, euphoric mood, disorientation, restlessness, agitation, nervousness, and abnormal thinking. Postmarketing reports have included hallucinations and panic attacks.


Musculoskeletal side effects have included arthralgia, involuntary muscle contractions, and sensation of heaviness.


Dermatologic side effects have included pruritus, hyperhidrosis, generalized pruritus, and urticaria.


Cardiovascular side effects have included hot flushes, heart rate increased, heart rate decreased, edema, and decreased blood pressure.


Respiratory side effects have included decreased oxygen saturation, cough, dyspnea, upper respiratory tract infection, nasopharyngitis, and respiratory depression.


Genitourinary side effects have included urinary tract infection, urinary hesitation, and pollakiuria.


General side effects have included fatigue and feeling hot.


Immunologic side effects have included hypersensitivity.


Ocular side effects have included visual disturbance.


Postmarketing reports: Anaphylactic shock

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