Can I take Pregabalin and Tizanidine together?

Why this happens

Both medicines act as central nervous system (CNS) depressants. While they work in different ways, they both slow down brain activity. When taken together, their effects add up (a 'synergistic' effect), making the sedative impact much stronger than if either were taken alone.

Use this combination with caution and only under strict medical supervision. Do not drive, operate heavy machinery, or perform dangerous tasks until you know how this combination affects you. Avoid alcohol, as it will make these side effects much worse. If you experience extreme sleepiness or difficulty breathing, seek medical help immediately. Your doctor may need to adjust your doses.

Mental health disorders

Pregabalin can cause suicidal thoughts or an urge to self-harm. You must seek medical help immediately if your mood changes or you have thoughts of hurting yourself.

Severe respiratory depression

Pregabalin can cause serious breathing problems, especially if you already have lung disease or if you take it with other sedating medicines like opioids. Seek emergency help if you experience slow, shallow, or difficult breathing.

Pregnancy

Pregabalin use during the first three months of pregnancy may increase the risk of birth defects. Effective contraception must be used during treatment.

Liver disease

Tizanidine can cause severe liver damage. You will need regular blood tests to monitor your liver function, and you must report any yellowing of the skin or eyes (jaundice) immediately.

Drug dependence and withdrawal

Both medicines carry a risk of dependence and addiction. Do not stop taking them suddenly, as this can cause serious withdrawal symptoms such as seizures (with pregabalin) or a dangerous spike in blood pressure and heart rate (with tizanidine).

Low blood pressure (hypotension)

Tizanidine can cause a significant drop in blood pressure, leading to fainting or dizziness. This risk is much higher if taken with certain antibiotics (like ciprofloxacin) or blood pressure medications.

Alcohol

It is best to avoid or strictly limit alcohol while taking these medicines. Both pregabalin and tizanidine cause drowsiness and dizziness; alcohol will significantly increase these effects, making you more likely to have an accident or fall. Combining alcohol with these medicines can also lead to dangerous levels of respiratory depression (slowed breathing).

Caffeine (Coffee, Tea, Energy Drinks)

Caffeine can interfere with how your body breaks down tizanidine. This can lead to higher levels of the medicine in your blood, increasing the risk of side effects like extreme sleepiness, very low blood pressure, or a slow heart rate.

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.