Can I take Hydroxycarbamide and Naproxen together?

Why this happens

This is a 'double-hit' interaction. Firstly, both drugs have 'myelosuppressive' effects (they slow down blood cell production in the bone marrow). Secondly, naproxen can interfere with how the kidneys filter waste; since hydroxycarbamide is mainly removed from the body by the kidneys, any reduction in kidney function can cause hydroxycarbamide to build up to dangerous levels.

What you should do

You should speak to your doctor before taking these two medicines together. Your doctor may suggest an alternative painkiller, such as paracetamol, which does not affect the kidneys in the same way. If you must take both, your doctor will likely want to perform more frequent blood tests to monitor your kidney function and your blood cell counts. Seek medical help immediately if you notice unusual bruising, bleeding, a sore throat, or a fever.

Important precautions

Pregnancy and Contraception

Hydroxycarbamide can cause serious birth defects. Both men and women must use highly effective contraception during treatment and for several months after stopping. Men should also discuss sperm storage before starting treatment as it can cause permanent infertility.

Pregnancy (third trimester)

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

Handling and Hygiene

Hydroxycarbamide is a cytotoxic medicine. You must wear gloves when handling the capsules or cleaning up any body fluids (like urine or vomit) to prevent others from being exposed to the drug. Wash your hands thoroughly after handling.

Sun Exposure

Hydroxycarbamide significantly increases your risk of developing skin cancer. You must protect your skin from sunlight by using high-factor sunscreen (SPF 30 or higher) and wearing protective clothing.

Infection and Bleeding

Hydroxycarbamide can severely lower your white blood cell count. You must seek urgent medical attention if you develop signs of infection (fever, sore throat) or unexplained bruising/bleeding.

Asthma and Stomach Ulcers

Do not take naproxen if you have ever had a stomach ulcer or if you have asthma that is triggered or worsened by aspirin or other NSAIDs.

Food and drink warnings

Alcohol

It is best to avoid or strictly limit alcohol while taking hydroxycarbamide. Both alcohol and this medication can affect your liver and bone marrow; combining them may increase the risk of side effects or liver damage. Additionally, alcohol can worsen dizziness or drowsiness caused by the medicine.

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.

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.

Using other medicines

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.