← All medications

Clonazepam

Medication benzodiazepine mental health
Aka: Rivotril
Brands seen in Singapore: Clonotril, Clonazepam Mevon
Not medical advice. Check with your doctor or pharmacist before you start, stop or change the timing of anything you take.
How to use
What it’s for
Prescribed for anxiety, panic, insomnia or seizures
When to take
HealthHub: with or without food, as the doctor directs
Take with
Water · HealthHub: alcohol can cause excessive sleepiness
Pros & cons
Pros
  • HealthHub: for short-term anxiety or panic symptoms
  • HealthHub: also used for some types of seizures
  • HealthHub: most side effects improve with time
Cons
  • HealthHub: habit-forming at high doses or long use
  • HealthHub: drowsiness, dizziness, feeling unsteady
  • HealthHub: abrupt stopping can trigger withdrawal fits
Sources
  1. HSA — Listing of Registered Therapeutic Products (data.gov.sg open dataset, 5,511 rows, cached in full and filtered locally) · read 2026-08-27
    what it says
    “Both registered clonazepam products carry Forensicclassification 'Prescription Only' — SIN06410P CLONOTRIL 0.5 TABLET 0.5 mg · SIN17075P CLONAZEPAM MEVON TABLETS 0.5 MG. No product named RIVOTRIL appears in the dataset.”
  2. HealthHub (National Medication Information workgroup, SG) — Clonazepam: what is this medication for · read 2026-08-27
    what it says
    “Clonazepam is used for short term treatment of insomnia (difficulty sleeping), anxiety, panic symptoms or controlling certain types of seizures (fits).”
  3. HealthHub — Clonazepam: how should I take this medication · read 2026-08-27
    what it says
    “Follow the instructions on your medication label and take this medication as prescribed by your doctor. This medication may be taken with or without food … obtain this medication from the same doctor or clinic whenever possible.”
  4. HealthHub — Clonazepam: common side effects · read 2026-08-27
    what it says
    “Nausea or stomach discomfort … Constipation … Dizziness … Drowsiness or feeling tired … Feeling clumsy or unsteady. Most of the side effects listed here will improve with time.”
  5. HealthHub — Clonazepam: dependence and habit-forming potential · read 2026-08-27
    what it says
    “This medication may be habit-forming when taken excessively or for a prolonged duration (especially at high doses) … On a short-term basis (2 - 4 weeks); At the lowest effective dose; Intermittently”
  6. HealthHub — Clonazepam: stopping the medication · read 2026-08-27
    what it says
    “do not stop taking it abruptly as it may lead to withdrawal symptoms such as increased sweating, increased heart rate, tremors, trouble sleeping, increased agitation, hallucinations … and in severe cases, medical emergencies such as fits.”
  7. HealthHub — Clonazepam: what precautions should I take · read 2026-08-27
    what it says
    “Lung, brain, kidney or liver disease; Previous drug or alcohol abuse; Glaucoma (high pressure in the eyes), seizures (fits), Myasthenia Gravis … or sleep apnea … You are pregnant, planning to become pregnant, or breastfeeding.”
  8. HealthHub — Clonazepam: what food or medication should I avoid · read 2026-08-27
    what it says
    “Avoid drinking alcohol while taking Clonazepam as it can cause excessive sleepiness.”
  9. NHS Medicines A-Z — Taking clonazepam with other medicines and herbal supplements · read 2026-08-27
    what it says
    “anticonvulsants … antipsychotics or antidepressants … hypnotics … medicines used to lower blood pressure … drowsy (sedating) antihistamines … strong painkillers such as codeine, methadone, morphine, oxycodone, pethidine or tramadol; cimetidine … rifampicin … fluconazole”
  10. NHS Medicines A-Z — Mixing clonazepam with herbal remedies or supplements · read 2026-08-27
    what it says
    “Do not take herbal remedies for anxiety or insomnia, such as valerian or passionflower, with clonazepam. They can increase the drowsy effects of clonazepam and may also have other side effects.”
  11. US FDA label for KLONOPIN (clonazepam), Dosage and Administration — Seizure Disorders, Adults, via openFDA (effective 2025-12-01) · read 2026-08-27
    what it says
    “The initial dose for adults with seizure disorders should not exceed 1.5 mg/day divided into three doses … Maintenance dosage must be individualized for each patient depending upon response. Maximum recommended daily dose is 20 mg.”
  12. US FDA label for KLONOPIN (clonazepam), Dosage and Administration — Panic Disorder, Adults, via openFDA · read 2026-08-27
    what it says
    “Higher doses of 2, 3 and 4 mg/day in that study were less effective than the 1 mg/day dose … it is possible that some individual patients may benefit from doses of up to a maximum dose of 4 mg/day”
Report a correction View as JSON

Updated 2026-08-29. Every line above traces to a numbered source. Kozen-X is not a medical device and does not give medical advice. It lists what published sources have written down — nothing more. A pair not listed is unrecorded, not cleared. Before you start, stop or re-time anything, talk to your doctor or pharmacist.