Benzodiazepines

Clobazam (Onfi / Frisium)

Street names: Onfi, Frisium, Urbanol, Castilium

Overdose? Act now. Call emergency services — say "unresponsive, not breathing". Give naloxone for opioid-like signs. Hotlines

⚡What it does

Dependence still real despite 'gentler' reputation
Withdrawal seizures — especially dangerous in epilepsy patients who stop abruptly
Overdose with opioids
Accumulation with long half-life (~36h)

Substance	Class	Top risks	Street price
Clobazam (Onfi / Frisium)	Schedule IV	Dependence still real despite 'gentler' reputation; Withdrawal seizures — especially dangerous in epilepsy patients who stop abruptly	~$0.50–$2 per tablet grey-market
Diazepam	Schedule IV	Dependence in 2–4 weeks of daily use; Dangerous withdrawal (seizures) — never stop cold turkey	~$1–$10 per 10 mg tablet
Alprazolam (Xanax 2 mg)	Schedule IV	Dependence within weeks; brutal withdrawal (seizures risk); Counterfeit 'bars' increasingly contain fentanyl or bromazolam	~$2–$10 per 2 mg bar
Lorazepam (Ativan 2.5 mg)	Schedule IV	Dependence and withdrawal seizures; Rebound anxiety between doses	~$1–$5 per 2.5 mg tablet
Clonazepam (Rivotril/Klonopin 2 mg)	Schedule IV	Long half-life — dependence builds silently; Withdrawal can last months	~$1–$5 per 2 mg tablet
Nitrazepam (Nipam 5 mg)	Schedule IV	Morning 'hangover' impairment; Dependence and falls in older users	~$1–$4 per 5 mg tablet

Street prices are regional estimates. Potency and cuts vary constantly.

What does Clobazam (Onfi / Frisium) look like?

10–20 mg tablets, white scored

What are the signs of a Clobazam (Onfi / Frisium) overdose?

Sedation; Respiratory depression in combination; Dizziness Call emergency services immediately.

How addictive is it?

Dependence still real despite 'gentler' reputation Withdrawal can be life-threatening — medical tapering is essential.

Facts on this page are compiled from these primary sources. External links open in a new tab.