Can I take Solifenacin and Vitamin B12 together?

Why this happens

Solifenacin is used to treat an overactive bladder and is processed by specific liver enzymes. Vitamin B12 is a water-soluble vitamin that is absorbed in the gut and used by the body for nerve and blood health. These two substances do not interfere with each other's absorption, breakdown, or effects in the body.

What you should do

You can continue taking both solifenacin and vitamin B12 as prescribed. No special precautions are needed.

Important precautions

Glaucoma

Do not take solifenacin if you have narrow-angle glaucoma, as it can increase the pressure in your eyes and worsen the condition.

Urinary retention

Do not take solifenacin if you have difficulty emptying your bladder (urinary retention), as it may make this problem worse.

Food and drink warnings

Alcohol

It is best to avoid or strictly limit alcohol while taking solifenacin. Both alcohol and solifenacin can cause drowsiness and blurred vision; combining them increases the risk of these side effects and may impair your coordination.

It is best to avoid or strictly limit alcohol while taking Vitamin B12. Heavy alcohol consumption can interfere with the body's ability to absorb Vitamin B12 from the gut and can reduce the amount of the vitamin stored in the liver.

Grapefruit Juice

Grapefruit juice can increase the level of solifenacin in your blood, which may increase the risk of side effects such as dry mouth, constipation, and blurred vision. It is best to avoid drinking large amounts of grapefruit juice.

Caffeine (Coffee, Tea, Energy Drinks)

You should limit your intake of caffeine. Solifenacin is used to treat an overactive bladder, but caffeine is a natural diuretic and bladder irritant that can worsen symptoms like urgency and frequency, potentially making your medication less effective.

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.