Can I take Naproxen and Quetiapine together?

Why this happens

Naproxen is an anti-inflammatory (NSAID) that can thin the blood slightly and irritate the stomach lining. Quetiapine, while an antipsychotic, can also interfere with how platelets (the cells that help your blood clot) work. When combined, these effects add up, making bleeding more likely. Both drugs also reduce blood flow to the kidneys.

You should use this combination with caution. Watch for signs of stomach irritation, such as indigestion, stomach pain, or dark, tarry stools. If you notice unusual bruising or bleeding that won't stop, contact your doctor. Your doctor may want to monitor your kidney function with occasional blood tests if you take these long-term.

Suicidal thoughts and self-harm

Quetiapine can increase the risk of suicidal thoughts or self-harm, particularly in the first few weeks of treatment. Patients and carers should monitor for any sudden changes in mood, behaviour, or thoughts of hurting oneself.

Asthma

Do not take naproxen if you have asthma that is sensitive to aspirin or other NSAIDs, as it can trigger a life-threatening asthma attack or severe breathing difficulties.

Stomach ulcers or bleeding

Naproxen can cause serious stomach ulcers and internal bleeding. This risk is higher if you have had ulcers before, are over 65, or take other blood-thinning medicines. Stop taking it and see a doctor immediately if you have black, tarry stools or vomit blood.

Pregnancy (third trimester)

Do not take naproxen if you are more than 20 weeks pregnant. It can cause serious kidney or heart problems in the unborn baby and may lead to complications during delivery.

Neuroleptic Malignant Syndrome (NMS)

Seek urgent medical attention if you develop a high fever, severe muscle stiffness, confusion, or sweating. This may be a sign of NMS, a rare but life-threatening reaction to quetiapine.

Drowsiness and impaired coordination

Quetiapine causes significant drowsiness and can affect your balance. Do not drive or operate machinery until you know how it affects you, and be careful to avoid falls, especially when getting up from a sitting or lying position.

Alcohol

It is best to avoid or strictly limit alcohol while taking naproxen. Both alcohol and naproxen can irritate the lining of your stomach; combining them significantly increases your risk of developing stomach ulcers or internal bleeding.

It is best to avoid or strictly limit alcohol while taking quetiapine. Combining alcohol with this medicine can significantly increase drowsiness and dizziness, making you more likely to fall or have an accident. Both substances are processed by the liver, and combining them can put extra strain on your system.

Grapefruit juice

You should avoid drinking grapefruit juice or eating grapefruit while taking quetiapine. Grapefruit contains compounds that stop your body from breaking down the medicine properly. This can lead to dangerously high levels of quetiapine in your blood, increasing the risk of serious side effects.

Caffeine (Coffee, Tea, Energy Drinks)

Caffeine can interfere with how quetiapine works. It may reduce the effectiveness of the medicine or worsen certain side effects like restlessness. Try to keep your caffeine intake consistent and avoid consuming large amounts.

Food (General)

You should take naproxen with or just after a meal or a snack. This helps to protect your stomach lining and reduces the risk of indigestion or stomach pain.

High-fat meals

If you are taking the extended-release (XL) version of quetiapine, you should avoid taking it with a very heavy or high-fat meal. This can cause the medicine to be absorbed into your system too quickly (known as 'dose dumping'), which increases the risk of side effects. It is usually best to take it without food or with a light snack.

Taking multiple medicines? Our Medicines Interaction Checker 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.

Disclaimer

This information is for general educational purposes only and should not be relied upon as a substitute for professional medical advice. Always consult your GP, pharmacist, or another qualified healthcare professional before making decisions about your medications. Individual circumstances may vary, and only a healthcare professional who knows your medical history can provide personalised guidance.