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Can I take Tramadol and Venlafaxine together?

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Taking these two medicines together significantly increases the risk of a rare but serious condition called 'serotonin syndrome'. This occurs when there is too much of a chemical called serotonin in your brain. Symptoms can include feeling very agitated, confused, or shaky, as well as sweating, a fast heartbeat, muscle twitching, or diarrhoea. In rare cases, this combination can also increase the risk of having a seizure (a fit).

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It is not recommended that you take tramadol och venlafaxine together as both medicines increase the levels of serotonin in the brain, which can raise the risk of a serious reaction called serotonin syndrome.

Additionally, both drugs can lower the 'seizure threshold', making it easier for the brain to experience a seizure.

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How to know if you're having a drug interaction

You may be experiencing a drug interaction between tramadol and venlafaxine if you notice:

  • Agitation, restlessness or confusion.

  • Shivering or sweating.

  • Muscle twitching, stiffness or jerking movements.

  • Fast heartbeat.

  • Diarré.

  • Headache.

  • Feeling unusually anxious or overactive.

These may be signs of serotonin syndrome, which can be serious.

Seek urgent medical help if you have:

  • A high fever.

  • Severe confusion or agitation.

  • Seizures.

  • Irregular heartbeat.

  • Medvetslöshet.

Serotonin syndrome

Taking these two medicines together significantly increases the risk of serotonin syndrome, a potentially life-threatening condition. Seek immediate medical help if you experience high fever, agitation, confusion, shivering, or rapid muscle contractions.

Suicidal thoughts and self-harm

Antidepressants like venlafaxine can increase thoughts of self-harm or suicide, particularly when first starting the treatment or changing the dose. Monitor your mood closely and tell someone you trust or seek medical help immediately if your mood worsens.

Seizures (fits)

Both medicines can lower the seizure threshold. Taking them together increases the risk of having a fit, especially if you have a history of epilepsy or are taking other medicines that increase seizure risk.

Breathing problems or asthma

Tramadol can cause dangerous breathing difficulties, especially if you have existing lung conditions or asthma. Seek immediate medical help if you experience slow or shallow breathing.

Bleeding risk

Venlafaxine can increase your risk of bleeding, particularly from the gut. This risk is much higher if you also take aspirin, NSAIDs (like ibuprofen or naproxen), or blood-thinning medicines.

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Alkohol

It is best to avoid or strictly limit alcohol while taking these medicines. Combining alcohol with tramadol or venlafaxine increases the risk of severe drowsiness, dizziness, and breathing difficulties. It can also increase the risk of liver damage.

Caffeine (Coffee, Tea, Energy Drinks)

Venlafaxine can increase the levels of caffeine in your blood, and caffeine can increase your blood pressure. This may lead to feeling jittery, anxious, or having a racing heart. Limit your intake of caffeine-containing drinks.

Taking multiple medicines? Our Interaktionskontroll för läkemedel helps you check whether your prescriptions, over-the-counter medicines, and supplements are safe to take together. Simply search for your medicines to see potential interactions and what to do about them.

Ansvarsfriskrivning

Denna information är endast avsedd för allmän utbildning och bör inte användas som en ersättning för professionell medicinsk rådgivning. Rådfråga alltid din läkare, apotekare eller annan kvalificerad vårdpersonal innan du fattar beslut om dina mediciner. Individuella omständigheter kan variera, och endast en vårdpersonal som känner till din medicinska historia kan ge personlig vägledning.

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Artikelhistorik

Informationen på denna sida är skriven och granskad av kvalificerade kliniker.

  • 25 jan 2026 | Ursprungligen publicerad
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