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Ryzolt Side Effects Center

Medical Editor: John P. Cunha, DO, FACOEP

Last reviewed on RxList 3/17/2016

Ryzolt (tramadol hydrochloride extended-release tablets) is a narcotic-like pain reliever used to treat moderate to severe pain or severe chronic pain when treatment is needed around the clock. Ryzolt is available in generic form. Possible side effects of Ryzolt include:

  • nausea
  • vomiting
  • dizziness
  • spinning sensation
  • drowsiness
  • flushing
  • blurred vision
  • upset stomach
  • constipation
  • headache
  • sleep problems
  • nervousness, or
  • anxiety

The recommended dosage of Ryzolt is 1 tablet (100 mg) daily. Ryzolt may interact with pain medications (mixed narcotic agonist-antagonists such as pentazocine, nalbuphine, butorphanol), narcotic antagonists (such as naltrexone), monoamine oxidase inhibitors (MAOIs), and other antidepressants. Do not drive, use machinery, or do any activity that requires alertness while taking Ryzolt. Avoid alcohol. Ryzolt should be used during pregnancy only if the potential benefit justifies the potential risk to the fetus. Ryzolt is excreted in breast milk. Consult your doctor if you are breastfeeding.

Our Ryzolt (tramadol hydrochloride extended-release tablets) 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.

What is Patient Information in Detail?

Easy-to-read and understand detailed drug information and pill images for the patient or caregiver from Cerner Multum.

Ryzolt in Detail - Patient Information: Side Effects

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

Stop using tramadol and call your doctor at once if you have any of these serious side effects:

  • agitation, hallucinations, fever, fast heart rate, overactive reflexes, nausea, vomiting, diarrhea, loss of coordination, fainting;
  • seizure (convulsions);
  • a red, blistering, peeling skin rash; or
  • shallow breathing, weak pulse.

Less serious side effects may include:

  • dizziness, spinning sensation;
  • constipation, upset stomach;
  • headache;
  • drowsiness; or
  • feeling nervous or anxious.

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.

Read the entire detailed patient monograph for Ryzolt (Tramadol Hydrochloride Extended-Release Tablets)

What is Patient Information Overview?

A concise overview of the drug for the patient or caregiver from First DataBank.

Ryzolt Overview - Patient Information: Side Effects

SIDE EFFECTS: Nausea, vomiting, constipation, sweating, trouble sleeping, dry mouth, fatigue, loss of appetite, lightheadedness, dizziness, drowsiness, or headache may occur. Some of these side effects may decrease after you have been using this medication for a while. If any of these effects persist or worsen, tell your doctor or pharmacist promptly.

To prevent constipation, eat a diet adequate in fiber, drink plenty of water, and exercise. Ask your pharmacist for help in selecting a laxative (such as a stimulant type with stool softener).

To reduce the risk of dizziness and lightheadedness, get up slowly when rising from a sitting or lying position.

Remember that your doctor has prescribed this medication because he or she has judged that the benefit to you is greater than the risk of side effects. Many people using this medication do not have serious side effects.

Tell your doctor immediately if any of these unlikely but serious side effects occur: mental/mood changes (such as agitation, confusion, hallucinations), severe stomach/abdominal pain, difficulty urinating.

Get medical help right away if any of these rare but serious side effects occur: fainting, seizure, slow/shallow breathing, unusual drowsiness/difficulty waking up.

This medication may increase serotonin and rarely cause a very serious condition called serotonin syndrome/toxicity. The risk increases if you are also taking other drugs that increase serotonin, so tell your doctor or pharmacist of all the drugs you take (see Drug Interactions section). Get medical help right away if you develop some of the following symptoms: fast heartbeat, hallucinations, loss of coordination, severe dizziness, severe nausea/vomiting/diarrhea, twitching muscles, unexplained fever, unusual agitation/restlessness.

A very serious allergic reaction to this drug is rare. However, get medical help right away if you notice any of the following symptoms: rash, itching/swelling (especially of the face/tongue/throat), severe dizziness, trouble breathing.

This is not a complete list of possible side effects. If you notice other effects not listed above, contact your doctor or pharmacist.

In the US -

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

In Canada - Call your doctor for medical advice about side effects. You may report side effects to Health Canada at 1-866-234-2345.

Read the entire patient information overview for Ryzolt (Tramadol Hydrochloride Extended-Release Tablets)

What is Prescribing information?

The FDA package insert formatted in easy-to-find categories for health professionals and clinicians.

Ryzolt FDA Prescribing Information: Side Effects
(Adverse Reactions)


RYZOLT™ (tramadol hydrochloride extended-release tablets) was administered to a total of 2707 subjects (2406 patients and 301 healthy volunteers) during clinical studies, including four randomized double-blind studies (treatment ≥ 12 weeks) and two open-label long-term studies (treatment up to 12 months) in patients with moderate to severe pain due to osteoarthritis of the knee. A total of 844 patients were exposed to RYZOLT™ (tramadol hydrochloride extended-release tablets) for 12 weeks, 493 patients for 6 months and 243 patients for 12 months. Treatment emergent adverse events increased with dose from 100 mg to 300 mg in the three twelve-week, randomized, double-blind, placebo-controlled studies (Table 2).

Table 2. Percentage of Patients with Incidence of Adverse Events ≥ 2% from Three 12-week Placebo-Controlled Studies (MDT3-002, MDT3-003 and MDT3-005).

ADVERSE EVENTS (MEDRA Preferred Terms) RYZOLT™ Placebo
100 mg N=216 200 mg
300 mg
Nausea 28 (13%) 42 (14%) 76 (14%) 179 (16%) 37 (6%)
Constipation 21 (10%) 36 (12%) 52 (10%) 140 (13%) 26 (4%)
Dizziness 16 (7%) 28 (9%) 52 (10%) 106 (10%) 18 (3%)
Somnolence 11 (5%) 22 (7%) 23 (4%) 77 (7%) 12 (2%)
Vomiting 7 (3%) 16 (5%) 31 (6%) 58 (5%) 4 (1%)
Pruritus 9 (4%) 15 (5%) 18 (3%) 51 (5%) 7 (1%)
Headache 10 (5%) 9 (3%) 15 (3%) 41 (4%) 21 (3%)
Sweating increased 1 (0%) 9 (3%) 14 (3%) 35 (3%) 5 (1%)
Dry mouth 7 (3%) 13 (4%) 6 (1%) 32 (3%) 8 (1%)
Fatigue 6 (3%) 7 (2%) 9 (2%) 26 (2%) 6 (1%)
Anorexia 4 (2%) 4 (1%) 10 (2%) 25 (2%) 2 (0%)
Vertigo 2 (1%) 3 (1%) 6 (1%) 21 (2%) 3 (0%)
Insomnia 2 (1%) 6 (2%) 9 (2%) 18 (2%) 8 (1%)
*Due to the difference in study design of MDT3-005, only the results of the double-blind phase of the study are presented and the dose specific results include maintenance period data only.

The majority of patients who experienced the most common adverse events ( ≥ 5%) reported mild to moderate symptoms. Less than 3% of adverse events were rated as severe. Overall, onset of these adverse events usually occurred within the first two weeks of treatment.

Adverse reactions with an incidence of 1.0% to < 5.0%

Ear and labyrinth disorders: vertigo

Gastrointestinal disorders: abdominal pain, diarrhea, dry mouth, dyspepsia, upper abdominal pain

General disorders: fatigue, weakness

Investigations: weight decreased

Metabolism and nutrition disorders: anorexia

Musculoskeletal and connective tissue disorders: arthralgia

Nervous system disorders: headache, tremor

Psychiatric disorders:anxiety, insomnia

Skin and subcutaneous tissue disorders: pruritus, sweating increased

Vascular disorders: hot flushes

Adverse reactions with an incidence of < 1.0%

Blood and lymphatic system disorders: anemia, thrombocytopenia

Cardiac disorders: bradycardia

Eye disorders: blurred vision, visual disturbance

Gastrointestinal disorders: abdominal discomfort, abdominal distension, abdominal tenderness, change in bowel habit, constipation aggravated, diverticulitis, diverticulum, dyspepsia aggravated, dysphagia, fecal impaction, gastric irritation, gastritis, gastrointestinal hemorrhage, gastrointestinal irritation, gastro-esophageal reflux disease, lower abdominal pain, pancreatitis aggravated, rectal hemorrhage, rectal prolapse, retching

General disorders: asthenia, malaise

Hepatobiliary disorders:biliary tract disorder, cholelithiasis

Immune system disorders: hypersensitivity

Investigations: alanine aminotransferase decreased, alanine aminotransferase increased, aspartate aminotransferase decreased, aspartate aminotransferase increased, blood amylase increased, blood creatinine increased, blood in stool, blood potassium abnormal, blood pressure increased gamma glutamyltransferase increased

Metabolism and nutrition disorders: appetite decreased, dehydration

Nervous system disorders: ataxia, disturbance in attention, dysarthria, gait abnormal, headache aggravated, mental impairment, sedation, seizure, sleep apnea syndrome, syncope, tremor

Psychiatric disorders: abnormal behavior, agitation, anxiety, confusion, depression, emotional disturbance, euphoric mood, indifference, irritability, libido decreased, nervousness, sleep disorder

Renal and urinary disorders: difficulty in micturition, urinary hesitation, urinary retention

Reproductive system and breast disorders: erectile dysfunction, sexual dysfunction,

Respiratory, thoracic and mediastinal disorders: dyspnea

Skin and subcutaneous tissue disorders: allergic dermatitis, cold sweat, dermatitis, night sweats, pallor, generalized pruritus, urticaria

Vascular disorders: flushing, hypertension, hypotension, orthostatic hypotension

Read the entire FDA prescribing information for Ryzolt (Tramadol Hydrochloride Extended-Release Tablets)

Ryzolt - User Reviews

Ryzolt User Reviews

Now you can gain knowledge and insight about a drug treatment with Patient Discussions.

Here is a collection of user reviews for the medication Ryzolt sorted by most helpful. Patient Discussions FAQs

Report Problems to the Food and Drug Administration


You are encouraged to report negative side effects of prescription drugs to the FDA. Visit the FDA MedWatch website or call 1-800-FDA-1088.

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