How does cinnarizine work?
Cinnarizine is a type of medicine called an antihistamine. It's classed as a drowsy (sedating) antihistamine.
It blocks the effects of histamine in your brain to reduce symptoms of travel sickness.
It also acts as a calcium channel blocker. This helps improve blood flow in the inner ear and reduces symptoms caused by vertigo, tinnitus and Ménière's disease.
How long does it take to work?
Cinnarizine works gradually.
From the time you take the tablet, it can take up to 4 hours for the medicine to reach its full effect.
Are there any long-term side effects?
Cinnarizine is unlikely to harm you, even if you take it for a long time.
However, only take this medicine for as long as you need it.
If you find that cinnarizine makes you put on weight, and regular exercise and eating well do not help, speak to your doctor.
What will happen if I stop taking it?
If you've been prescribed cinnarizine to help with inner ear problems, your symptoms may return if you stop taking it.
Will it affect my contraception?
Cinnarizine does not affect any type of contraception, including the combined pill and emergency contraception.
If you take contraceptive pills and cinnarizine makes you sick, your contraception may not protect you from pregnancy. Check the pill packet for advice.
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Can I drive or ride a bike?
Do not drive a car or ride a bike if cinnarizine makes you sleepy, or makes you feel dizzy, clumsy or unable to concentrate or make decisions.
This may be more likely when you first start taking cinnarizine, but it could happen at any time (for example, when starting another medicine).
It's an offence to drive a car if your ability to drive safely is affected. It's your responsibility to decide if it's safe to drive. If you're in any doubt, do not drive.
Talk to your doctor or pharmacist if you're unsure whether it's safe for you to drive while taking cinnarizine. GOV.UK has more information on the law on drugs and driving.
Can I drink alcohol while taking cinnarizine?
It's best not to drink alcohol while taking cinnarizine.
Cinnarizine combined with alcohol can make you feel very sleepy.
Is there any food or drink I need to avoid?
Apart from avoiding alcohol, you can eat and drink normally while taking cinnarizine.