Description and Brand Names

Drug information provided by: Merative, Micromedex®

US Brand Name

  1. ConZip
  2. FusePaq Synapryn
  3. Qdolo
  4. Rybix ODT
  5. Ryzolt
  6. Ultram
  7. Ultram ER

Descriptions


Tramadol is used to relieve moderate to moderately severe pain, including pain after surgery. It is also used to treat pain severe enough to require opioid treatment and when other pain medicines did not work well enough or cannot be tolerated. The extended-release capsules or tablets are used for chronic ongoing pain.

Tramadol belongs to the group of medicines called opioid analgesics. It acts in the central nervous system (CNS) to relieve pain.

When tramadol is used for a long time, it may become habit-forming, causing mental or physical dependence. However, people who have continuing pain should not let the fear of dependence keep them from using narcotics to relieve their pain. Mental dependence (addiction) is not likely to occur when narcotics are used for this purpose. Physical dependence may lead to withdrawal side effects if treatment is stopped suddenly. However, severe withdrawal side effects can usually be prevented by gradually reducing the dose over a period of time before treatment is stopped completely.

This medicine is available only under a restricted distribution program called the Opioid Analgesic REMS (Risk Evaluation and Mitigation Strategy) program.

This product is available in the following dosage forms:

  • Capsule, Extended Release
  • Solution
  • Tablet
  • Tablet, Extended Release
  • Capsule, Extended Release, 24 HR
  • Suspension

Before Using

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.

Pediatric

Appropriate studies have not been performed on the relationship of age to the effects of Ryzolt™ in children younger than 16 years of age. Safety and efficacy have not been established.

Conzip® extended-release capsules, Qdolo® oral liquid, and Ultram® tablets should not be used in children younger than 12 years of age. It should not be used to relieve pain after surgery removal of tonsils or adenoids in any children. Severe breathing problems and deaths have been reported in some children who received tramadol after tonsil or adenoid surgery.

Appropriate studies have not been performed on the relationship of age to the effects of tramadol extended-release tablets in the pediatric population. Safety and efficacy have not been established.

Geriatric

Appropriate studies performed to date have not demonstrated geriatric-specific problems that would limit the usefulness of tramadol in the elderly. However, elderly patients are more likely to have unwanted side effects (eg, constipation, lightheadedness, dizziness, or fainting, stomach upset, weakness) and age-related liver, kidney, heart, or lung problems, which may require caution and an adjustment in the dose for patients receiving tramadol.

Breastfeeding

Studies in women breastfeeding have demonstrated harmful infant effects. An alternative to this medication should be prescribed or you should stop breastfeeding while using this medicine.

Drug Interactions

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 taking 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.

  • Furazolidone
  • Iproniazid
  • Isocarboxazid
  • Linezolid
  • Methylene Blue
  • Moclobemide
  • Nalmefene
  • Naltrexone
  • Nialamide
  • Phenelzine
  • Procarbazine
  • Rasagiline
  • Safinamide
  • Samidorphan
  • Selegiline
  • Tranylcypromine

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.

  • Abiraterone Acetate
  • Acepromazine
  • Alfentanil
  • Almotriptan
  • Alprazolam
  • Amifampridine
  • Amineptine
  • Amiodarone
  • Amitriptyline
  • Amitriptylinoxide
  • Amobarbital
  • Amoxapine
  • Amphetamine
  • Amprenavir
  • Anileridine
  • Aprepitant
  • Aripiprazole
  • Armodafinil
  • Asenapine
  • Atazanavir
  • Baclofen
  • Benperidol
  • Benzhydrocodone
  • Benzphetamine
  • Boceprevir
  • Bosentan
  • Bromazepam
  • Bromopride
  • Bromperidol
  • Brompheniramine
  • Buprenorphine
  • Bupropion
  • Buspirone
  • Butabarbital
  • Butorphanol
  • Calcium Oxybate
  • Cannabidiol
  • Cannabis
  • Carbamazepine
  • Carbinoxamine
  • Carisoprodol
  • Carphenazine
  • Ceritinib
  • Cetirizine
  • Chloral Hydrate
  • Chlordiazepoxide
  • Chlorpheniramine
  • Chlorpromazine
  • Chlorzoxazone
  • Cimetidine
  • Cinacalcet
  • Ciprofloxacin
  • Citalopram
  • Clarithromycin
  • Clobazam
  • Clomipramine
  • Clonazepam
  • Clopidogrel
  • Clorazepate
  • Clozapine
  • Cobicistat
  • Cocaine
  • Codeine
  • Conivaptan
  • Crizotinib
  • Cyclobenzaprine
  • Cyclosporine
  • Daridorexant
  • Darunavir
  • Delavirdine
  • Desipramine
  • Desmopressin
  • Desvenlafaxine
  • Dexamethasone
  • Dexmedetomidine
  • Dextroamphetamine
  • Dextromethorphan
  • Dezocine
  • Diazepam
  • Dibenzepin
  • Dichloralphenazone
  • Difenoxin
  • Dihydrocodeine
  • Diltiazem
  • Diphenhydramine
  • Diphenoxylate
  • Dolasetron
  • Donepezil
  • Dothiepin
  • Doxepin
  • Doxylamine
  • Dronedarone
  • Droperidol
  • Duloxetine
  • Efavirenz
  • Eletriptan
  • Enflurane
  • Enzalutamide
  • Erythromycin
  • Escitalopram
  • Esketamine
  • Eslicarbazepine Acetate
  • Estazolam
  • Eszopiclone
  • Ethchlorvynol
  • Ethopropazine
  • Ethylmorphine
  • Etravirine
  • Fedratinib
  • Fenfluramine
  • Fentanyl
  • Flibanserin
  • Fluconazole
  • Fluoxetine
  • Fluphenazine
  • Flurazepam
  • Fluspirilene
  • Fluvoxamine
  • Fosamprenavir
  • Fosaprepitant
  • Fosphenytoin
  • Fospropofol
  • Frovatriptan
  • Gabapentin
  • Gabapentin Enacarbil
  • Gepirone
  • Granisetron
  • Halazepam
  • Haloperidol
  • Halothane
  • Hexobarbital
  • Hydrocodone
  • Hydromorphone
  • Hydroxyamphetamine
  • Hydroxytryptophan
  • Hydroxyzine
  • Idelalisib
  • Imatinib
  • Imipramine
  • Indinavir
  • Isoflurane
  • Itraconazole
  • Ivacaftor
  • Ketamine
  • Ketazolam
  • Ketobemidone
  • Ketoconazole
  • Lacosamide
  • Lasmiditan
  • Lemborexant
  • Lenacapavir
  • Levocetirizine
  • Levoketoconazole
  • Levomilnacipran
  • Levorphanol
  • Lisdexamfetamine
  • Lithium
  • Lofepramine
  • Lofexidine
  • Lomitapide
  • Lopinavir
  • Lorazepam
  • Lorcaserin
  • Loxapine
  • Lumacaftor
  • Magnesium Oxybate
  • Meclizine
  • Melitracen
  • Melperone
  • Meperidine
  • Mephobarbital
  • Meprobamate
  • Meptazinol
  • Mesoridazine
  • Metaxalone
  • Methadone
  • Methamphetamine
  • Methocarbamol
  • Methohexital
  • Methotrexate
  • Methotrimeprazine
  • Metoclopramide
  • Mibefradil
  • Midazolam
  • Mifepristone
  • Milnacipran
  • Mirabegron
  • Mirtazapine
  • Mitotane
  • Modafinil
  • Molindone
  • Moricizine
  • Morphine
  • Morphine Sulfate Liposome
  • Nafcillin
  • Nalbuphine
  • Naratriptan
  • Nefazodone
  • Nelfinavir
  • Nevirapine
  • Nicomorphine
  • Nilotinib
  • Nitrazepam
  • Nitrous Oxide
  • Nortriptyline
  • Olanzapine
  • Ondansetron
  • Opipramol
  • Opium
  • Opium Alkaloids
  • Orphenadrine
  • Oxazepam
  • Oxcarbazepine
  • Oxycodone
  • Oxymorphone
  • Ozanimod
  • Palbociclib
  • Palonosetron
  • Papaveretum
  • Paregoric
  • Paroxetine
  • Peginterferon Alfa-2b
  • Pentazocine
  • Pentobarbital
  • Perampanel
  • Periciazine
  • Perphenazine
  • Phenobarbital
  • Phenytoin
  • Pimozide
  • Piperacetazine
  • Pipotiazine
  • Piritramide
  • Posaconazole
  • Potassium Oxybate
  • Prazepam
  • Prednisone
  • Pregabalin
  • Primidone
  • Prochlorperazine
  • Promethazine
  • Propofol
  • Protriptyline
  • Quazepam
  • Quetiapine
  • Quinidine
  • Quinine
  • Ramelteon
  • Ranitidine
  • Ranolazine
  • Remifentanil
  • Remimazolam
  • Remoxipride
  • Rifabutin
  • Rifampin
  • Rifapentine
  • Ritonavir
  • Rizatriptan
  • Rolapitant
  • Ropeginterferon Alfa-2b-njft
  • Saquinavir
  • Scopolamine
  • Secobarbital
  • Sertindole
  • Sertraline
  • Sibutramine
  • Sodium Oxybate
  • St John's Wort
  • Sufentanil
  • Sulpiride
  • Sumatriptan
  • Suvorexant
  • Tapentadol
  • Telaprevir
  • Telithromycin
  • Temazepam
  • Terbinafine
  • Thiethylperazine
  • Thiopental
  • Thiopropazate
  • Thioridazine
  • Tianeptine
  • Tilidine
  • Tizanidine
  • Tolonium Chloride
  • Topiramate
  • Trazodone
  • Triazolam
  • Trifluoperazine
  • Trifluperidol
  • Triflupromazine
  • Trimeprazine
  • Trimipramine
  • Tryptophan
  • Venlafaxine
  • Verapamil
  • Vilazodone
  • Voriconazole
  • Vortioxetine
  • Zaleplon
  • Ziprasidone
  • Zolmitriptan
  • Zolpidem
  • Zopiclone
  • Zotepine
  • Zuranolone

Using this medicine with any of the following medicines may cause an increased risk of certain side effects, but using both drugs may be the best treatment for you. If both medicines are prescribed together, your doctor may change the dose or how often you use one or both of the medicines.

  • Digoxin
  • Warfarin

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.

Using this medicine with any of the following is usually not recommended, but may be unavoidable in some cases. If used together, your doctor may change the dose or how often you use this medicine, or give you special instructions about the use of food, alcohol, or tobacco.

  • Ethanol
  • Grapefruit Juice

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:

  • Adrenal problems or
  • Alcohol abuse, history of or
  • Brain tumor or
  • Depression, history of or
  • Diabetes or
  • Drug abuse or dependence, history of or
  • Gallstones or
  • Head injury or
  • Hormonal problems or
  • Increased pressure in the head or
  • Infections of the central nervous system (CNS) or
  • Lung or breathing problems (eg, COPD, cor pulmonale, hypercapnia, hypoxia, sleep apnea) or
  • Mental illness (eg, suicidal ideation), history of or
  • Phenylketone allergy, history of or
  • Seizures or epilepsy, history of or
  • Stomach problems, severe—Use with caution. May increase risk for more serious side effects.
  • Asthma, acute or severe or
  • Lung or breathing problems, severe or
  • Stomach or bowel blockage (eg, paralytic ileus) or
  • Surgery (eg, nasopharyngeal tonsils, tonsils)—Should not be used in patients with these conditions.
  • Kidney disease or
  • Liver disease (including cirrhosis)—Use with caution. The effects may be increased because of slower removal of the medicine from the body.

Proper Use

Take this medicine only as directed by your doctor. Do not take more of it, do not take it more often, and do not take it for a longer time than your doctor ordered. This is especially important for elderly patients, who may be more sensitive to the effects of pain medicines. If too much of this medicine is taken for a long time, it may become habit-forming (causing mental or physical dependence) or cause an overdose.

It is very important that you understand the rules of the Opioid Analgesic REMS program to prevent addiction, abuse, and misuse of tramadol. This medicine should come with a Medication Guide. Read and follow the instructions carefully. Read it again each time you refill your prescription in case there is new information. Ask your doctor if you have any questions.

If you think that this medicine is not working as well after you have been taking it for a few weeks, do not increase the dose. Instead, check with your doctor.

Swallow the extended-release capsule, extended-release tablet, and tablet whole with liquids. Do not break, crush, chew, snort, or inject it.

Measure the oral liquid with the marked dosing syringe that comes with the package. Your dose needs to be measured and given accurately to avoid an overdose.

Dosing

The dose of this medicine will be different for different patients. Follow your doctor's orders or the directions on the label. The following information includes only the average doses of this medicine. If your dose is different, do not change it unless your doctor tells you to do so.

The amount of medicine that you take depends on the strength of the medicine. Also, the number of doses you take each day, the time allowed between doses, and the length of time you take the medicine depend on the medical problem for which you are using the medicine.

  • For chronic pain:
    • For oral dosage form (extended-release capsules):
      • Adults—At first, 100 milligrams (mg) once a day. Your doctor may increase your dose as needed. However, the dose is usually not more than 300 mg per day.
      • Children 12 years of age and older—Use and dose must be determined by your doctor.
      • Children younger than 12 years of age—Should not be used in these patients.
    • For oral dosage form (extended-release tablets):
      • Adults—At first, 100 milligrams (mg) once a day. Your doctor may increase your dose as needed. However, the dose is usually not more than 300 mg per day.
      • Children—Use and dose must be determined by your doctor.
  • For moderate to severe pain:
    • For oral dosage form (solution):
      • Adults—At first, 25 milligrams (mg) once a day. Your doctor may increase your dose as needed. However, the dose is usually not more than 400 mg per day.
      • Children younger than 12 years of age—Should not be used in these patients.
    • For oral dosage form (tablets):
      • Adults—At first, 25 milligrams (mg) per day, taken every morning. Your doctor may increase your dose as needed and tolerated. However, the dose is usually not more than 400 mg per day.
      • Older adults over 75 years of age—At first, 25 mg per day, taken every morning. Your doctor may increase your dose as needed and tolerated. However, the dose is usually not more than 300 mg per day.
      • Children 12 years of age and older—Use and dose must be determined by your doctor.
      • Children younger than 12 years of age—Should not be used in these patients.

Missed Dose

If you miss a dose of this medicine, skip the missed dose and go back to your regular dosing schedule. Do not double doses.

Storage

Store the medicine in a closed container at room temperature, away from heat, moisture, and direct light. Keep from freezing.

Keep out of the reach of children.

Do not keep outdated medicine or medicine no longer needed.

Ask your healthcare professional how you should dispose of any medicine you do not use.

Drop off any unused narcotic medicine at a drug take-back location right away. If you do not have a drug take-back location near you, flush any unused narcotic medicine down the toilet. Check your local drug store and clinics for take-back locations. You can also check the DEA web site for locations. Here is the link to the FDA safe disposal of medicines website: www.fda.gov/drugs/resourcesforyou/consumers/buyingusingmedicinesafely/ensuringsafeuseofmedicine/safedisposalofmedicines/ucm186187.htm

Precautions

It is very important that your doctor check your or your child's progress at regular visits, especially within the first 24 to 72 hours of treatment to make sure the medicine is working properly. Blood and urine tests may be needed to check for unwanted effects.

Do not use this medicine if you are using or have used an MAO inhibitor (MAOI) such as isocarboxazid [Marplan®], linezolid [Zyvox®], phenelzine [Nardil®], selegiline [Eldepryl®], tranylcypromine [Parnate®]) within the past 14 days.

You should not take other medicines that also contain tramadol. This includes Conzip®, Qdolo®, Ryzolt™, Ultram®, or Ultracet®. Using these medicines together may increase your chance for more serious side effects.

Check with your doctor before using this medicine with alcohol or other medicines that affect the central nervous system (CNS). The use of alcohol or other medicines that affect the CNS with tramadol may worsen the side effects of this medicine, such as dizziness, poor concentration, drowsiness, unusual dreams, and trouble with sleeping. Some examples of medicines that affect the CNS are antihistamines or medicine for allergies or colds, sedatives, tranquilizers, or sleeping medicines, medicine for depression, medicine for anxiety, prescription pain medicine or narcotics, medicine for attention deficit and hyperactivity disorder, medicine for seizures or barbiturates, muscle relaxants, or anesthetics, including some dental anesthetics.

This medicine may cause sleep-related breathing problems (eg, sleep apnea, sleep-related hypoxemia). Your doctor may decrease your dose if you have sleep apnea (stop breathing for short periods during sleep) while using this medicine.

Using this medicine while you are pregnant may cause neonatal withdrawal syndrome in your newborn baby. Check with your doctor right away if your baby has an abnormal sleep pattern, diarrhea, a high-pitched cry, irritability, shakiness or tremors, weight loss, vomiting, or fails to gain weight. Tell your doctor right away if you think you are pregnant or if you plan to become pregnant while using this medicine.

Tramadol is highly metabolized in the body. Some people change tramadol to a stronger product (O-desmethyltramadol) more quickly than others. These individuals are called "ultra-rapid metabolizers of tramadol". Contact your doctor immediately if you experience extreme sleepiness, confusion, or shallow breathing. These symptoms may indicate that you are an "ultra-rapid metabolizer of tramadol." As a result, there is too much O-desmethyltramadol in the body and more side effects of O-desmethyltramadol than usual. Children may be especially sensitive to this effect (eg, serious breathing problems, death). Do not give this medicine to:

  • Children younger than 12 years of age.
  • Children younger than 18 years of age who have had surgery removal of tonsils or adenoids.
  • Children 12 to 18 years of age who have a high risk for breathing problems (eg, obstructive sleep apnea, obesity, lung disease).

If a nursing mother is an ultra-rapid metabolizer of tramadol, it could lead to an overdose in the nursing baby and cause very serious side effects.

For nursing mothers using this medicine:

  • Talk to your doctor if you have any questions about taking tramadol or about how this medicine may affect your baby.
  • Call your doctor if you become extremely tired and have difficulty caring for your baby.
  • Your baby should generally nurse every 2 to 3 hours and should not sleep more than 4 hours at a time.
  • Check with your doctor, hospital emergency room, or local emergency services (eg, "call 9-1-1") immediately if your baby shows signs of increased sleepiness (more than usual), difficulty breastfeeding, difficulty breathing, or limpness. These may be symptoms of an overdose and need immediate medical attention.

Call your doctor right away if you have worsening of pain, increased sensitivity to pain, or new pain after taking this medicine. These may be symptoms of opioid-induced hyperalgesia and allodynia.

Check with your doctor right away if you or your child have anxiety, restlessness, a fast heartbeat, fever, sweating, muscle spasms, twitching, nausea, vomiting, diarrhea, or see or hear things that are not there. These may be symptoms of a serious condition called serotonin syndrome. Your risk may be higher if you also take certain other medicines that affect serotonin levels in your body.

This medicine may cause some people to be agitated, irritable, or display other abnormal behaviors. It may also cause some people to have suicidal thoughts and tendencies or to become more depressed. Make sure your doctor knows if you have trouble sleeping, get upset easily, have a big increase in energy, or start to act reckless. Also tell your doctor if you have any sudden or strong feelings, such as feeling nervous, angry, restless, violent, or scared. Let your doctor know if you or anyone in your family has bipolar disorder (manic-depressive disorder) or has tried to attempt suicide.

This medicine may cause serious allergic reactions, including anaphylaxis, angioedema, or certain skin conditions (eg, Stevens-Johnson syndrome, toxic epidermal necrolysis), which can be life-threatening and require immediate medical attention. Call your doctor right away if you or your child have a rash, itching, blistering, peeling, or loosening of the skin, fever or chills, cough, red irritated eyes, red skin lesions, often with a purple center, sore throat, sores, ulcers, or white spots in the mouth or on the lips, trouble breathing or swallowing, unusual tiredness or weakness, or any swelling of your hands, face, mouth, or throat while you are using this medicine.

This medicine may cause some people to become drowsy, dizzy, or lightheaded. Do not drive or do anything else that could be dangerous until you know how this medicine affects you.

This medicine may cause adrenal gland problems. Check with your doctor right away if you have darkening of the skin, diarrhea, dizziness, fainting, loss of appetite, mental depression, nausea, skin rash, unusual tiredness or weakness, or vomiting.

Dizziness, lightheadedness, or fainting may occur, especially when you get up suddenly from a lying or sitting position. Getting up slowly may help. Also, lying down for a while may relieve dizziness or lightheadedness. If this problem continues or gets worse, check with your doctor right away.

This medicine may cause hyponatremia (low sodium levels in the blood). Check with your doctor right away if you have coma, confusion, decreased urine output, dizziness, fast or irregular heartbeat, headache, increased thirst, muscle pain or cramps, nausea or vomiting, swelling of the face, ankles, or hands, trouble breathing, or unusual tiredness or weakness.

Check with your doctor right away if you have anxiety, blurred vision, chills, cold sweats, coma, confusion, cool, pale skin, depression, dizziness, fast heartbeat, headache, increased hunger, nausea, nervousness, nightmares, seizures, shakiness, slurred speech, or unusual tiredness or weakness. These may be symptoms of hypoglycemia (low blood sugar level).

Before having any kind of surgery (including dental surgery) or emergency treatment, tell the doctor or dentist in charge that you are taking this medicine. Serious side effects can occur if your doctor or dentist gives you certain medicines without knowing that you have been taking tramadol.

If you think you or someone else may have taken an overdose of this medicine, get emergency help at once. Your doctor may also give naloxone and other medicines to treat an overdose. Signs of an overdose include: seizures, difficulty or trouble breathing, irregular, fast or slow, or shallow breathing, pale or blue lips, fingernails, or skin, pinpoint pupils of the eyes.

Do not change your dose or suddenly stop using this medicine without first checking with your doctor. Your doctor may want you to gradually reduce the amount you are using before stopping it completely. This may help prevent worsening of your condition and reduce the possibility of withdrawal symptoms, including stomach cramps, anxiety, fever, nausea, runny nose, sweating, tremors, or trouble sleeping.

Using too much of this medicine may cause infertility (unable to have children). Talk with your doctor before using this medicine if you plan to have children.

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

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 immediately if any of the following side effects occur:

Less common

  1. Abnormal or decreased touch sensation
  2. blisters under the skin
  3. bloating
  4. blood in the urine
  5. blood pressure increased
  6. blurred vision
  7. change in walking and balance
  8. chest pain or discomfort
  9. chills
  10. dark urine
  11. difficult urination
  12. dizziness or lightheadedness when getting up suddenly from a lying or sitting position
  13. fainting
  14. fast heartbeat
  15. frequent urge to urinate
  16. gaseous stomach pain
  17. indigestion
  18. irregular heartbeat
  19. loss of memory
  20. numbness and tingling of the face, fingers, or toes
  21. pain in the arms, legs, or lower back, especially pain in the calves or heels upon exertion
  22. pain or discomfort in the arms, jaw, back, or neck
  23. pains in the stomach, side, or abdomen, possibly radiating to the back
  24. pale, bluish-colored or cold hands or feet
  25. recurrent fever
  26. seeing, hearing, or feeling things that are not there
  27. seizures
  28. severe cramping
  29. severe nausea
  30. severe redness, swelling, and itching of the skin
  31. stomach fullness
  32. sweating
  33. swelling of the hands, ankles, feet, or lower legs
  34. trembling and shaking of the hands or feet
  35. trouble performing routine tasks
  36. weak or absent pulses in the legs
  37. yellow eyes or skin

Incidence not known

  1. Agitation
  2. anxiety
  3. chest tightness
  4. cold sweats
  5. coma
  6. confusion
  7. cool, pale skin
  8. cough
  9. darkening of the skin
  10. decreased urine output
  11. depression
  12. diarrhea
  13. difficulty swallowing
  14. dizziness
  15. fever
  16. headache
  17. hives, itching, skin rash
  18. increased hunger
  19. increased sensitivity to pain
  20. increased thirst
  21. loss of appetite
  22. mental depression
  23. muscle cramps
  24. nausea
  25. nervousness
  26. nightmares
  27. overactive reflexes
  28. poor coordination
  29. puffiness or swelling of the eyelids or around the eyes, face, lips, or tongue
  30. restlessness
  31. shakiness
  32. shivering
  33. slurred speech
  34. swelling of the face, ankles, or hands
  35. talking or acting with excitement you cannot control
  36. trouble breathing
  37. twitching
  38. unusual tiredness or weakness
  39. vomiting
  40. worsening of pain

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

Symptoms of overdose

  1. Change in consciousness
  2. decreased awareness or responsiveness
  3. difficulty with breathing
  4. lack of muscle tone
  5. lightheadedness
  6. loss of consciousness
  7. pinpointed pupils of the eyes
  8. severe sleepiness
  9. slow or irregular heartbeat
  10. unusual tiredness

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:

More common

  1. Constipation
  2. discouragement
  3. drowsiness
  4. dry mouth
  5. feeling of warmth
  6. feeling sad or empty
  7. feeling unusually cold
  8. general feeling of discomfort or illness
  9. heartburn
  10. irritability
  11. itching or skin rash
  12. joint pain
  13. loss of interest or pleasure
  14. loss of strength or weakness
  15. muscle aches and pains
  16. redness of the face, neck, arms, and occasionally, upper chest
  17. runny nose
  18. sleepiness or unusual drowsiness
  19. sore throat
  20. stomach pain
  21. stuffy nose
  22. tiredness
  23. trouble concentrating
  24. unusual feeling of excitement
  25. weakness

Less common

  1. Abnormal dreams
  2. appetite decreased
  3. back pain
  4. bladder pain
  5. blistering, crusting, irritation, itching, or reddening of the skin
  6. bloody or cloudy urine
  7. body aches or pain
  8. change in hearing
  9. clamminess
  10. cough producing mucus
  11. cracked, dry, or scaly skin
  12. decreased interest in sexual intercourse
  13. difficult, burning, or painful urination
  14. difficulty with moving
  15. disturbance in attention
  16. ear congestion
  17. ear drainage
  18. earache or pain in the ear
  19. excessive gas
  20. falls
  21. false or unusual sense of well-being
  22. feeling hot
  23. feeling jittery
  24. general feeling of bodily discomfort
  25. goosebumps
  26. headache, severe and throbbing
  27. hoarseness
  28. inability to have or keep an erection
  29. itching, pain, redness, swelling, tenderness, or warmth on the skin
  30. joint sprain, stiffness, or swelling
  31. loss in sexual ability, desire, drive, or performance
  32. loss of voice
  33. lower back or side pain
  34. muscle injury, stiffness, spasms, or twitching
  35. neck pain
  36. night sweats
  37. pain in the limbs
  38. pain or tenderness around the eyes and cheekbones
  39. pain, swelling, or redness in the joints
  40. skin discoloration
  41. trouble in holding or releasing urine
  42. trouble sleeping
  43. weight changes

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.