Medicines & Supplements A to Z > Nitrazepam


Last updated on 24/03/2021.

Overview   |   Dosage   |    Side Effects   |   Precautions  |   Tips  |   Where To Buy  

GENERIC NAME: Nitrazepam 


BRAND NAME(S) IN HONG KONG: Alodorm, Dima, Flunita, Nipa, Nitredon, Rohypnol 

DRUG CLASS: Benzodiazepine 

USED FOR: Short-term treatment and symptomatic relief of insomnia

OTHER DRUGS IN THE SAME CLASS: Alprazolam, Bromazepam, Clobazam, Chlordiazepoxide, Clonazepam, Diazepam, Lorazepam, Midazolam, Pinazepam, Triazolam

AVAILABLE DOSAGE FORMS: 1mg, 2mg, 5mg (tablets)

What is Nitrazepam for?

Nitrazepam belongs to a class of medications called benzodiazepines just like Clonazepam and Midazolam. Your doctor may prescribe Nitrazepam to treat insomnia for a short period of time. 

How to use it?

Nitrazepam is taken orally as tablets. The usual dose for adults is 5-10 mg daily. For elderly and debilitated patients, the dose to be taken is much less, ranging from 2.5-5 mg daily. You should take Nitrazepam at bedtime to help with insomnia.

What are the side effects of Nitrazepam?

Common side effects of Nitrazepam include decreased alertness, dizziness and drowsiness. Gait and coordination problems (ataxia) and confusion are more commonly seen in elderly; whereas respiratory depression may occur with high doses of Nitrazepam when combined with opioid medications.

Who should not take Nitrazepam?

– People who are allergic to Nitrazepam, other benzodiazepines or any formulation component
– Patients with acute lung insufficiency, sleep apnoea, unstable myasthenia gravis (skeletal muscle weakness), chronic psychosis, or respiratory depression
– Anyone with a history of substance abuse since there is a risk of abuse with benzodiazepines

Pharmacist Tips:

– Avoid using opioids or alcohol with Benzodiazepines.
– You should not take Nitrazepam for a long period of time. Do not discontinue the medication abruptly. Always discuss with your doctor or pharmacist on how to do so.
– After you have stopped taking Nitrazepam, transient insomnia may come back with other reactions, such as restlessness, anxiety, and mood changes.
– Avoid activities requiring mental alertness or coordination such as driving until you know how you respond to Nitrazepam

Common dosing schedule:
You should take Nitrazepam at bedtime. 

This schedule is for reference only, adjustments may be made according to individual needs.

Some common medications Nitrazepam may interact with:
– Atypical antipsychotics, e.g. Clozapine, Olanzapine
– CNS depressants, e.g. Buprenorphine
– Metoclopramide

Please notify your doctor or pharmacist if you are taking the above medication, dosage adjustments might be needed.

Where to buy Nitrazepam in Hong Kong?

In Hong Kong, Nitrazepam is a prescription only medicine, and requires a prescription from a doctor to be purchased in a pharmacy. It can also be obtained from doctors. To find a pharmacy near you, refer to the list of pharmacies (“Authorized Sellers of Poisons”) from the Hong Kong Department of Health.

For more information about drug names and ingredients, you can visit Hong Kong’s Drug Office at

Need more information?

For detailed information about the use of Nitrazepam in children, pregnancy, and breastfeeding, and for questions about drug interactions, please check with your pharmacist or doctor.

Disclaimer: our goal is to provide you with the most relevant drug information and common dosage for Hong Kong. This information does not constitute medical advice. For specific treatment recommendations and advice, always discuss with your doctor or pharmacist, and follow the instructions included with your specific medicine.