Can I take Mirabegron and Tamsulosin together?

Why this happens

Tamsulosin works by relaxing muscles in the prostate and bladder neck, but it can also relax blood vessels, leading to lower blood pressure. Mirabegron can occasionally affect blood pressure and heart rate. When used together, the combined effect on your circulation may increase the risk of feeling dizzy.

What you should do

You can take these medicines together, but be careful when moving from a lying or sitting position to standing. If you feel dizzy, sit or lie down until the feeling passes. It is a good idea to monitor your blood pressure regularly. If you experience severe dizziness, fainting, or a very fast heartbeat, contact your doctor.

Important precautions

Postural hypotension (Dizziness on standing)

Tamsulosin can cause a sudden drop in blood pressure when you stand up, especially after the first dose. Move slowly from lying or sitting to standing to avoid fainting or falls.

Do not take mirabegron if your blood pressure is very high (180/110 mmHg or higher). It can significantly increase blood pressure and should be monitored regularly during treatment.

Cataract or glaucoma surgery

If you are having eye surgery, tell your surgeon you are taking tamsulosin. It can cause 'Floppy Iris Syndrome,' which may complicate the procedure. You may need to stop the medicine temporarily.

Food and drink warnings

Alcohol

It is best to avoid or strictly limit alcohol while taking these medicines. Both mirabegron and tamsulosin can cause dizziness or lightheadedness, and alcohol can make these side effects much worse. Tamsulosin can also lower your blood pressure; drinking alcohol increases the risk of feeling faint or dizzy when you stand up.

Caffeine (Coffee, tea, energy drinks, cola)

While not a direct chemical interaction, caffeine is a bladder irritant and a diuretic. Since these medicines are used to treat urinary symptoms (like urgency or flow issues), consuming caffeine may counteract the benefits of your treatment and make your symptoms worse.

Food (General)

Tamsulosin capsules should be taken after the same meal each day (usually breakfast). Taking it on an empty stomach can cause the medicine to be absorbed too quickly, which increases the risk of side effects like a sudden drop in blood pressure or dizziness.

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.