Content reviewed by the PillRelax Healthcare Team | Last reviewed: September 2026
Clonazepam (brand name Klonopin or Rivotril) is a potent, long-acting benzodiazepine prescribed for anxiety disorders and panic disorder in the UK.
What Is Clonazepam Used For in the UK?
- Panic disorder (with or without agoraphobia)
- Generalised Anxiety Disorder (GAD) – typically short-term use
- Epilepsy – certain seizure types
How Does Clonazepam Work for Anxiety?
Clonazepam enhances GABA-A receptor activity, increasing chloride ion conductance and reducing excitatory signalling. Its long half-life (18-50 hours) provides sustained anxiety reduction over 12-24 hours per dose.
Clonazepam vs Diazepam for Anxiety
Clonazepam is approximately 20 times more potent than Diazepam. A 0.5mg Clonazepam dose has roughly equivalent anxiolytic effect to 10mg Diazepam. Clonazepam’s longer duration makes it preferable for ongoing anxiety management; Diazepam’s shorter duration suits acute situational anxiety.
Dependence and NICE Guidelines
NICE guidelines recommend Clonazepam for no longer than 2-4 weeks for anxiety, due to dependence risk. With Clonazepam’s high potency, dependence can develop rapidly.
Frequently Asked Questions
Is Clonazepam better than Diazepam for anxiety?
Neither is universally better – the choice depends on clinical context. Clonazepam suits sustained anxiety management; Diazepam suits acute or situational anxiety.
