Can I take Esomeprazole and Tizanidine together?

Why this happens

Tizanidine is broken down in the body by a specific liver enzyme (CYP1A2). Esomeprazole interferes with this enzyme, slowing down how quickly the body can get rid of tizanidine. This causes the medicine to build up to potentially dangerous levels.

What you should do

You should speak to your doctor before taking these two medicines together. They may want to adjust your dose of tizanidine or suggest an alternative acid-reducing medication (such as famotidine) that does not interfere with your liver enzymes in the same way. If you are already taking both and feel unusually sleepy or faint, seek medical advice immediately.

Important precautions

Low blood pressure (hypotension)

Tizanidine can cause a significant drop in blood pressure, leading to dizziness or fainting, especially when moving from sitting to standing.

Stopping treatment suddenly

Do not stop taking tizanidine suddenly. Doing so can cause a rapid rise in blood pressure and heart rate. Your dose must be reduced gradually.

Severe diarrhoea (C. difficile) - esomeprazole

Seek medical help if you develop severe or persistent watery diarrhoea, as this medicine can increase the risk of a serious bowel infection.

Vitamin B12 deficiency and bone fractures - esomeprazole

Long-term use (over a year) can weaken bones and lead to low magnesium or B12 levels; your doctor should monitor these if you are on long-term treatment.

Severe kidney or liver disease

Your doctor may need to prescribe a lower dose, as your body will take longer to clear esomeprazole.

Liver disease

Tizanidine is primarily processed by the liver; if you have liver problems, this medicine can build up to dangerous levels and cause severe side effects.

Magnesium deficiency

Taking esomeprazole for more than three months can cause your blood magnesium levels to drop significantly, leading to fatigue, muscle spasms, or dizziness.

Masking stomach cancer symptoms

Esomeprazole can hide the symptoms of stomach cancer. You must tell your doctor if you have unexplained weight loss, persistent vomiting, or difficulty swallowing before starting this medicine.

Food and drink warnings

Alcohol

While alcohol does not directly interact with esomeprazole, it can increase stomach acid production and irritate the stomach lining, which may worsen the symptoms your medicine is intended to treat. It is best to limit alcohol intake.

It is best to avoid or strictly limit alcohol while taking tizanidine. Alcohol can significantly increase the sedative effects of this medicine, making you feel extremely drowsy or dizzy, and increasing the risk of falls or accidents.

Caffeine

Caffeine (found in coffee, tea, and some fizzy drinks) can trigger or worsen acid reflux and heartburn. This may make esomeprazole less effective at managing your symptoms.

You should avoid or strictly limit caffeine while taking tizanidine. Caffeine can interfere with how your body breaks down tizanidine, which may lead to higher levels of the medicine in your blood. This increases the risk of side effects like low blood pressure, a slow heart rate, and extreme sleepiness.

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.