I suffer from insomnia.

Are there any side effects if I take Clonazepam daily as a sleeping aid for long term?

Will I become tolerant to it?

  • 1
    Do not answer in comments.
    – JohnP
    Commented Feb 27, 2016 at 22:16

1 Answer 1


Yes, clonazepam is known to cause tolerance, as well as other side effects (such as dependence) after a prolonged use.

From the medication Summary of Product Characteristics (SmPC):

Prolonged use of benzodiazepines may result in dependence with withdrawal symptoms on cessation of use. [...]

In particular long-term or high-dose treatment, may lead to reversible disorders such as dysarthria, reduced coordination of movements and gait disorder (ataxia), nystagmus and double vision (diplopia).

NHS also states:

Long-term treatment with benzodiazepines isn't usually recommended because they can become less effective over time and some people become dependent upon them.

What's more, Martindale: The Complete Drug Reference doesn't list clonazepam as a medication of choice for insomnia. Nor does NHS article on the treatment of insomnia. Although clonazepam does belong to benzodiazepines, group of medication that is used to treat insomnia, other medicines are recommended. Clonazepam has other indications, such as epilepsy.

Clonazepam, same as other benzodiazepines, is a prescription-only medicine. This means that you shouldn't be able to purchase it, without physician's recommendation. Your physician is able to explain to you the dosage, duration of use, and possible side-effects.


Clonazepam SPC

NHS: Insomnia - Treatment

Martindale: The Complete Drug Reference, 2005 The Pharmaceutical Press.

  • Is it prescription-only everywhere in the world?
    – Carey Gregory
    Commented Mar 2, 2016 at 14:10
  • @CareyGregory I wouldn't dare say everywhere in the world, but in the most part it is a controlled substance, and therefore the laws in most countries would regulate it as prescription-only. There are, probably, countries where the law is poorly enforced, i.e. the substance is, by law, prescription-only, but you can freely by it in a pharmacy without a prescription. These medicines are classified as controlled substances by the UN and from that link you can see that national authorities (such as the individual EU countries) accept this
    – Lucky
    Commented Mar 2, 2016 at 14:26

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