Last updated on RxList: 7/3/2017
Palladone Side Effects Center

Last reviewed on RxList 7/3/2017

Palladone (hydromorphone HCl) extended-release is a a mu-opioid used to manage pain in opioid-tolerant patients severe enough to require daily, around-the-clock, long-term opioid treatment and for which alternative treatment options are inadequate. Common side effects of Palladone include:

Dose of Palladone is individualized for each patient, taking into account the patient's prior analgesic treatment experience and risk factors for addiction, abuse, and misuse. Palladone may interact with alcohol, sedatives, hypnotics, tranquilizers, general anesthetics, phenothiazines, other opioids, pentazocine, nalbuphine, butorphanol, buprenorphine, monoamine oxidase inhibitors (MAOIs), and anticholinergics. Tell your doctor all medications and supplements you use. Palladone is not recommended for use during pregnancy. It may harm a fetus. If used during pregnancy it can cause withdrawal symptoms in a newborn. This drug passes into breast milk and may harm a nursing baby. Breastfeeding is not recommended while taking Palladone. Withdrawal symptoms may occur if you suddenly stop taking this medication.

Our Palladone (hydromorphone HCl) extended-release Side Effects Drug Center provides a comprehensive view of available drug information on the potential side effects when taking this medication.

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.


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The following serious adverse reactions are discussed elsewhere in the labeling:

Clinical Trial Experience

The safety of PALLADONE was evaluated in double-blind clinical trials involving 612 patients with moderate to severe pain. An open-label extension study involving 143 patients with cancer pain was conducted to evaluate the safety of PALLADONE when used for longer periods of time in higher doses than in the controlled trials. Patients were treated with doses averaging 40 to 50 mg of PALLADONE per day (ranging between 12 and 500 mg/day) for several months (range 1 to ≥ 52 weeks).

Serious adverse reactions which may be associated with PALLADONE therapy in clinical use are similar to those of other opioid analgesics, including respiratory depression, apnea, respiratory arrest, and to a lesser degree, circulatory depression, hypotension, shock or cardiac arrest [see OVERDOSAGE].

Adverse Events Reported in Controlled Trials

Table 2 lists treatment emergent signs and symptoms that were reported in at least 2% of patients in the placebo-controlled trials for which the rate of occurrence was greater for those treated with PALLADONE 12 mg capsules than those treated with placebo.

Table 2: Adverse Events Reported in the Placebo-Controlled Clinical Trials with Incidence ≥ 2% in Patients Receiving PALLADONE Capsules for Nonmalignant Pain

Body System / Adverse Event (COSTART Terminology) Placebo*
Double-blind %
Double-blind %
Total percentage of patients with AEs 35.10% 49.50%
Body as a Whole 15.70% 18.40%
Headache 2.10% 4.70%
Asthenia 0.50% 3.20%
Infection 5.80% 5.30%
Digestive System 13.10% 27.90%
Constipation 1.00% 15.80%
Nausea 6.30% 10.50%
Vomiting 1.60% 3.20%
Nervous System 13.10% 11.60%
Somnolence 1.60% 4.70%
Skin 5.20% 4.70%
Pruritus 1.00% 2.60%
* Average exposure was 21 days for PALLADONE and 15 days for placebo.

Adverse Events Observed in Clinical Trials

PALLADONE has been administered to 785 individuals during completed clinical trials. The conditions and duration of exposure to PALLADONE varied greatly, and included open-label and double-blind studies, uncontrolled and controlled studies, inpatient and outpatient studies, fixed dose and titration studies. Untoward events associated with this exposure were recorded by clinical investigators using terminology of their own choosing.

These categories are used in the listing below. The frequencies represent the proportion of 785 patients from these trials who experienced that event while receiving PALLADONE. All adverse events included in this tabulation occurred in at least one patient. Events are classified by body system and listed using the following definitions: frequent adverse events -those occurring in at least 1/100 patients; adverse events occurring with an incidence less than 1% are considered infrequent. These adverse events are not necessarily related to PALLADONE treatment and in most cases were observed at a similar frequency in placebo-treated patients in the controlled studies.

Frequent Adverse Events

Body as a Whole: headache, asthenia, pain, abdominal pain, fever, chest pain, infection, chills, malaise, neck pain, carcinoma, accidental injury

Cardiovascular System: vasodilatation, tachycardia, migraine

Digestive System: nausea, constipation, vomiting, diarrhea, dyspepsia, anorexia, dry mouth, nausea and vomiting, dysphagia, flatulence

Hemic and Lymphatic System: anemia, leukopenia

Metabolic and Nutritional Disorders: peripheral edema, dehydration, edema, generalized edema, hypokalemia, weight loss

Musculoskeletal: arthralgia, bone pain, leg cramps, myalgia

Nervous System: somnolence, dizziness, nervousness, confusion, insomnia, anxiety, depression, hypertonia, hypesthesia, paresthesia, tremor, thinking abnormal, hallucinations, speech disorder, agitation, amnesia, tinnitus, abnormal gait

Respiratory System: dyspnea, cough increased, rhinitis, pharyngitis, pneumonia, epistaxis, hiccup, hypoxia, pleural effusion

Skin and Appendages: pruritus, sweating, rash

Special Senses: amblyopia, taste perversion

Urogenital System: dysuria, urinary incontinence

Infrequent Adverse Events

Body as a Whole: face edema, ascites, allergic reaction, cellulitis, overdose, hypothermia, neoplasm, photosensitivity reaction, sepsis, flank pain

Cardiovascular System: hypertension, hypotension, syncope, deep thrombophlebitis, arrhythmia, postural hypotension, atrial fibrillation, pallor, bradycardia, electrocardiogram abnormal, myocardial infarction, palpitation, angina pectoris, congestive heart failure, QT interval prolonged, supraventricular tachycardia, thrombosis, cardiomegaly, hemorrhage

Digestive System: fecal impaction, intestinal obstruction, abnormal stools, fecal incontinence, hepatic failure, increased appetite, cholangitis, cholecystitis, colitis, enterocolitis, hepatomegaly, jaundice, liver function tests abnormal, biliary spasm, ileus, eructation, rectal hemorrhage, esophagitis, glossitis, melena, mouth ulceration, gastrointestinal hemorrhage, tongue edema

Endocrine: adrenal cortex insufficiency

Hemic and Lymphatic System: ecchymosis, thrombocytopenia, leukocytosis, lymphadenopathy, agranulocytosis, lymphoma like reaction, pancytopenia, petechia

Metabolic and Nutritional Disorders: hyperglycemia, hyponatremia, cachexia, hypercalcemia, hypomagnesemia, cyanosis, diabetes mellitus, gout, respiratory acidosis, elevated liver enzymes, thirst

Musculoskeletal: myasthenia

Nervous System: abnormal dreams, emotional lability, paranoid reaction, sleep disorder euphoria, incoordination, stupor, ataxia, convulsion, hallucination, hostility, myoclonus, psychosis, vertigo, withdrawal syndrome, apathy, delirium, dementia, drug dependence, nystagmus, twitching, depersonalization, aphasia, cerebrovascular accident, circumoral parasthesia, seizure, hyperkinesia, hypotonia, increased salivation, neuralgia

Respiratory System: hypoventilation, apnea, atelectasis, hemoptysis, asthma, hyperventilation, pulmonary embolus, laryngismus

Skin and Appendages: urticaria, maculopapular rash, alopecia

Special Senses: abnormal vision, diplopia, dry eyes, lacrimation disorder, hyperacusis

Urogenital: urinary retention, hematuria, impotence, urinary frequency, urination impaired, dysmenorrhea, creatinine increased, urinary urgency

Additional Adverse Events From Non-U.S. Experience

Addiction, blurred vision, drowsiness, dysphoria, sedation, seizure, physical dependence, biliary spasm, and ileus

Read the entire FDA prescribing information for Palladone (Hydromorphone Hydrochloride Extended-release Capsules)


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© Palladone Patient Information is supplied by Cerner Multum, Inc. and Palladone Consumer information is supplied by First Databank, Inc., used under license and subject to their respective copyrights.

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