Tramadol is a prescription pain medication that can help with moderate to severe pain. Tramadol side effects can include dizziness, nausea, sweating, heartburn, and more.

Doctors only prescribe tramadol to people over 12 years old. Adolescents with certain risk factors should speak with their doctors about the risks of taking tramadol.

Some people take tramadol for premature ejaculation and restless legs syndrome, but the Food and Drug Administration (FDA) have not approved these uses of it.

As an opioid drug, tramadol acts on the brain to relieve pain. However, tramadol is not as effective as morphine, which is another opioid. Because of its opioid activity, people can become dependent on tramadol.

In this article, we discuss the side effects of tramadol. We will also take a look at tramadol dependence.

Ultram and Ultram ER are the brand names of the drug tramadol. They are available in the form of immediate and extended release tablets. Tramadol is also combined with acetaminophen in the drug Ultracet.

The following table lists the available dosages of tramadol in milligrams (mg).

Brand nameActive ingredient and dosageType of release
Ultramtramadol 50 mgimmediate release
Ultram ERtramadol 100 mg
tramadol 200 mg
tramadol 300 mg
extended release
Ultracetacetaminophen 325 mg
tramadol 37.5 mg
immediate release

Tramadol acts on two compounds associated with the sensation of pain: serotonin and norepinephrine. Tramadol helps relieve pain by decreasing the amount of these two compounds in brain cells.

Liver enzymes break down tramadol into another compound called O-desmethyltramadol, which binds to the opioid receptor. This is the same receptor that morphine binds to, but tramadol is not as strong as morphine; its efficacy is “about one-tenth that of morphine.”

The FDA classify tramadol as a schedule IV drug because of its potential for misuse and addiction. It belongs to the same schedule as Xanax, Soma, and Valium.

Doctors should choose the lowest effective dosage for the shortest period and educate people on the possible risks of taking tramadol.

Tramadol can cause side effects in some people. They occur more often when people first start taking tramadol and can wear off over time.

Common side effects

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Side effects of tramadol include dizziness, nausea, and headaches.

The most common side effects of tramadol affect the abdominal tract and the brain.

The following list provides common side effects that occur in 5% or more of people who take tramadol:

Less common side effects

People may experience other side effects that occur with an incidence of less than 5%, such as:

  • whole body discomfort
  • allergic reactions
  • suicidal tendencies
  • weight loss
  • rapid heartbeat
  • drop in blood pressure upon standing up
  • confusion
  • disturbance in coordination
  • constriction of the pupil
  • fainting
  • rash
  • hives
  • visual disturbance
  • menopausal symptoms
  • retention of urine
  • difficulty breathing
  • frequent urination
  • serotonin syndrome

Serious side effects

Serious side effects may also occur in some people.

Some serious side effects include:

  • respiratory depression
  • serotonin syndrome
  • heart rhythm problems called QT prolongation

The following sections discuss these serious side effects.

Respiratory depression

Respiratory depression is a serious side effect that may occur in people taking tramadol. If a person has difficulty breathing while taking tramadol, they must seek emergency medical attention.

People can experience respiratory depression with usual dosages of tramadol. Respiratory depression usually occurs when the person starts taking tramadol or when they increase their dosage.

People who overdose on tramadol are at an even greater risk of respiratory depression. Combining certain drugs with tramadol can also increase the risk of respiratory depression.

Some people are more at risk than others. Some people’s bodies break down tramadol into O-desmethyltramadol much more quickly and completely. This can result in higher levels of this compound in the bloodstream and lead to respiratory depression.

Adolescents aged 12–18 years may have additional risk factors for respiratory depression:

  • obesity
  • severe lung disease
  • neuromuscular disease

Some adolescents may be taking other medicines that put them at greater risk of respiratory depression. In these situations, tramadol can cause life threatening respiratory depression.

Serotonin syndrome

Serotonin syndrome develops when there is too much serotonin accumulating in the body. This can cause mild to fatal symptoms.

In rare cases, people can experience serotonin syndrome when taking tramadol alone or with other drugs.

The symptoms of serotonin syndrome may include:

  • agitation
  • hallucinations
  • coma
  • rapid heartbeat
  • fluctuating blood pressure
  • high body temperature
  • muscle rigidity
  • nausea
  • vomiting
  • diarrhea

Heart rhythm problems

QT prolongation is a serious condition affecting the heart rhythm. On an electrocardiogram of the heart, the QT interval represents a portion of the electrical activity during the heartbeat.

Some drugs, such as tramadol, can cause QT prolongation. When a person has a prolonged QT interval, they may experience serious heart problems. They may have an irregular heartbeat, which can become life threatening.

In most cases of QT prolongation related to tramadol, a person has taken tramadol with other drugs that prolong the interval.

Although the combination of QT-prolonging drugs can be dangerous, some people are born with long QT syndrome. These people should let their doctor know about their condition before taking tramadol.

People who overdose on tramadol also have an increased risk of QT prolongation.

Tramadol can interact with several medications, such as benzodiazepines and serotonergic drugs.


Benzodiazepines are drugs that reduce anxiety and relax the muscles. People use them to treat anxiety and insomnia.

If someone is already taking a benzodiazepine medication such as lorazepam or alprazolam, also taking tramadol can result in sedation, respiratory depression, coma, and even death.

Serotonergic drugs

Serotonergic drugs affect serotonin levels in the body. People use them to treat depression.

People who are taking serotonergic drugs should use tramadol carefully because of the risk of serotonin syndrome.

The following table lists serotonergic drug classes:

Drug classDrugs
selective serotonin reuptake inhibitors (SSRIs)citalopram, escitalopram, fluoxetine, fluvoxamine, paroxetine, sertraline
serotonin and norepinephrine reuptake inhibitors (SNRIs)venlafaxine, duloxetine, desvenlafaxine
tricyclic antidepressantsamitriptyline, imipramine, clomipramine
triptansalmotriptan, eletriptan, frovatriptan, rizatriptan, sumatriptan
5-HT3 receptor antagonistsgranisetron, ondansetron
monoamine oxidase inhibitors (MOIs)phenelzine, selegiline

People taking tramadol should report any side effects to their doctor. By discussing the benefits and risks of the medication, a doctor can help a person find the most appropriate medicine at the lowest effective dosage.

Severe allergic reactions require emergency medical attention.

Anyone having difficulty breathing or experiencing any symptoms of serotonin syndrome must seek immediate medical care.

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People may become dependent on tramadol when taking it for more than a few weeks or months.

According to a World Health Organization (WHO) report on tramadol, clinical data in adults suggests that the drug has a low potential for dependence.

People may, however, become dependent on tramadol when taking it for more than a few weeks or months. People with a history of drug misuse are more at risk of developing a dependence on tramadol.

In one case study, a 39-year-old male with no history of substance misuse went to the emergency room to get help for tramadol addiction. His tramadol treatment began about 2 years earlier. He was taking up to 600 mg per day and was unable to stop taking it without experiencing withdrawal symptoms.

So, in rare cases, tramadol dependence can affect people without a history of drug misuse.

Tramadol is an opioid pain medication. It also acts on brain chemicals called serotonin and norepinephrine to relieve moderate to severe pain.

Tramadol is not safe for everyone. Children under 12 years old should not take tramadol, and those aged 12–18 should use caution when taking it.

Some people may experience mild to severe side effects when taking tramadol. Some drug interactions can occur with tramadol, and the effects can be severe.

Although it has a low potential for dependence, the Drug Enforcement Administration (DEA) control the distribution of tramadol.