Can I take Gabapentin and Modafinil together?

Why this happens

There is no significant evidence that these drugs change how the other is absorbed or cleared by the body (pharmacokinetics). However, they both affect the central nervous system in opposing ways (pharmacodynamics). This can lead to unpredictable effects on your coordination, alertness, and mental clarity.

What you should do

You can usually take these together, but you should be cautious, especially when first starting the combination or changing your dose. Do not drive or operate heavy machinery until you know how the mix affects you. If you feel excessively dizzy, confused, or 'spaced out', contact your doctor.

Important precautions

Breathing problems or opioid use

Gabapentin can cause serious, life-threatening breathing difficulties, especially if you already have lung disease or if you take it alongside opioid pain relief (such as morphine or codeine).

Mental health disorders

A small number of people treated with gabapentin have had thoughts of harming or killing themselves. You must seek immediate medical help if you notice any changes in your mood or suicidal thoughts.

Abrupt discontinuation

Do not stop taking gabapentin suddenly. Doing so can cause serious side effects, including an increase in seizure frequency or severe withdrawal symptoms. Your dose must be reduced gradually.

Contraception and Pregnancy

Modafinil reduces the effectiveness of hormonal contraceptives (the pill, patches, or implants). You must use an additional barrier method, such as condoms, during treatment and for two months after stopping. It must not be used during pregnancy as it may cause harm to the unborn baby.

Severe skin reactions

Stop taking modafinil and seek urgent medical attention if you develop a skin rash, hives, or blisters, as it can cause rare but life-threatening skin reactions.

Food and drink warnings

Alcohol

It is best to avoid or strictly limit alcohol while taking gabapentin. Combining alcohol with gabapentin can significantly increase the risk of severe drowsiness, dizziness, and breathing difficulties. It may also impair your coordination and judgment more than usual.

It is best to avoid or strictly limit alcohol while taking modafinil. Combining the two can increase the risk of side effects like dizziness, drowsiness, and impaired judgement. Additionally, modafinil can mask the effects of alcohol, making you feel less intoxicated than you actually are, which can lead to dangerous situations.

Caffeine (Coffee, tea, energy drinks)

Be cautious with caffeine intake. Both modafinil and caffeine are stimulants; combining them can increase the risk of side effects like jitteriness, a racing heart, anxiety, and high blood pressure.

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.