As with any medication, Sativex can cause unwanted side effects. These will vary from person to person, and not everyone will get them.

The most common side effects with Sativex are dizziness and tiredness. Some people may also feel depressed or confused, may feel over-excited or lose touch with reality, may have difficulties with memory or trouble concentrating and may feel sleepy or giddy.1 The patient information leaflet in each pack of Sativex will give you a full list of all the side effects that have been reported with this medicine.

For most people taking Sativex, these side effects are mild to moderate, last only a few hours and can be managed by changing the number of sprays or taking a short break from using the medicine. Side effects are most likely to happen when you start treatment and will often decrease as you become more used to Sativex.1

However, it is important to tell your doctor or nurse of any side effects you may be experiencing – they can advise you on how best to manage them.

If you feel any unwanted effects, wait until they have stopped completely before taking Sativex again. Once they have gone, you can usually find the dose that’s right for you by doing one of the following:1

  • Reducing the number of sprays you take each day
  • Increasing the time between each spray