Pregabalin

Alpha-2-delta ligand·Neurology - Anticonvulsants

Neuropathic pain, focal seizures

Authority requiredPBSGABAPENTINOIDLyrica300 mg+2

Max Dose

600 mg/day

Half-life

6 h

Misuse Risk

CRITICAL

Sedation

COMMON

Rapid Summary

Overview

The highly potent successor to Gabapentin. Superior, predictable absorption. Exceptional for neuropathic pain and severe anxiety, but plagued by a massive epidemic of street diversion and abuse.

Maximum Dose

Max 600 mg/day (Usually 150-300 mg BD).

Clinical Focus

Induces intense euphoria in high doses. Highly sought after by addicts to amplify the 'high' of opioids.

Bottom Line

Pregabalin is effective for neuropathic pain, generalised anxiety, and fibromyalgia, but is now Schedule 8 due to high misuse and dependence potential and causes significant dizziness and weight gain.

Formulation & Access

Brand Names

Lyrica

Oral Routes

Capsules (25, 75, 150, 300 mg).

Prescribing & PBS

Authority Required (PBS) for neuropathic pain. High scrutiny on ward and community prescribing due to abuse.

Indications & Use

Primary

PBSTGA

Neuropathic pain, focal seizures.

Off-Label

OFF

Generalised Anxiety Disorder (Standard in Europe, off-label in Aus), Restless Legs Syndrome.

Clinical Place

Preferred over Gabapentin for efficacy and BD dosing, but avoided in patients with any history of substance abuse.

Quick reference

Class & Role

Alpha-2-delta ligand — The highly potent successor to Gabapentin.

Route / Formulation

Capsules (25, 75, 150, 300 mg). (Lyrica)

Usual Dose & Max

Start PO 75 mg BD. Titrate to 150-300 mg BD after 3-7 days. Max 600 mg/day.

Key Indication Doses

Neuropathic Pain: Start PO 75 mg BD. Titrate to 150-300 mg BD after 3-7 days. Max 600 mg/day. Generalised Anxiety Disorder (GAD): PO 75 mg BD, titrate to 300 mg/day. Renal Impairment: If eGFR 30-60, Max 300 mg/day. If eGFR 15-30, Max 150 mg/day. If eGFR < 15, Max 75 mg/day.

Best Uses

Avoid / Cautions

History of severe substance abuse (unless strictly monitored). Severe renal failure without dose adjustment. Pregnancy Category B3.

Key Risks

Neurological: Euphoria, high addiction/abuse potential. HIGH — Dizziness, severe somnolence, ataxia, withdrawal syndrome if stopped abruptly. Respiratory: Synergistic respiratory depression with opioids. Metabolic: Significant weight gain, peripheral edema.

Key Interactions

Opioids, Benzodiazepines, Alcohol. The combination causes profound respiratory arrest and is the leading cause of poly-drug overdose deaths globally.

Monitoring

Look for 'lost scripts' or patients demanding early refills. Do not prescribe 300mg capsules to opioid users unless absolutely clinically necessary. Check eGFR to dictate safe dosing limits.

Clinical Pearl

Unlike Gabapentin (which maxes out its absorption transporters in the gut), Pregabalin absorption is linear and >90% at ANY dose. If you swallow 600mg of Pregabalin, 600mg hits your brain. This makes it vastly more effective, but infinitely more abusable.

Access

Authority requiredLyrica300 mg

Brand: Lyrica
PBS status: Authority required
Formulation: Capsules (25, 75, 150, 300 mg)