What are pregabalin and gabapentin?
Pregabalin (Lyrica) and gabapentin (Neurontin) are gabapentinoids — medications that work by binding to calcium channels in the brain and reducing the release of excitatory neurotransmitters. They are prescribed for neuropathic pain, epilepsy, generalised anxiety disorder (pregabalin is licensed for this indication; gabapentin is not, though it is prescribed off-label), and fibromyalgia. Both are also frequently prescribed for insomnia.
Since April 2019, both pregabalin and gabapentin have been classified as Class C controlled substances in the UK — a recognition of their significant potential for dependence, misuse and, in combination with opioids or other CNS depressants, fatal overdose. Despite this, prescribing of both medications has continued to rise.
Why these medications cause dependence
Gabapentinoids work by suppressing excitatory neural activity. With regular use, the brain compensates by upregulating excitatory pathways. When the medication is reduced or stopped, this compensation becomes unopposed — producing a rebound of excitatory symptoms that can be very distressing and, in some cases, dangerous.
The risk of dependence is dose-related and duration-related. People on higher doses for longer periods are more likely to experience significant withdrawal. However, clinically meaningful dependence can develop within weeks to months even at therapeutic doses.
Pregabalin and gabapentin withdrawal symptoms
Withdrawal from gabapentinoids can share features with both benzodiazepine and opiate withdrawal, reflecting their broad effects on the nervous system. Symptoms can include:
- Anxiety and agitation — often severe and disproportionate to circumstances
- Insomnia — often worse than the original sleep difficulty
- Sweating, tremor and palpitations
- Nausea, diarrhoea and flu-like symptoms
- Headaches and dizziness
- Heightened sensitivity to pain — particularly relevant for those prescribed for neuropathic pain
- Cognitive difficulties — brain fog, confusion, difficulty concentrating
- Mood instability — low mood, irritability, emotional dysregulation
- Seizures — in cases of abrupt cessation at higher doses
Do not stop pregabalin or gabapentin abruptly
Abrupt cessation of pregabalin or gabapentin — particularly at higher doses — carries a risk of seizures. Always reduce gradually under medical supervision. If you have already stopped abruptly and are experiencing seizures or severe symptoms, call 999 immediately.
How tapering works
Pregabalin and gabapentin both have relatively short half-lives (pregabalin approximately six hours; gabapentin three to five hours), meaning changes in dose are felt quickly. Gradual, proportional reduction is essential.
Key principles for tapering:
- Reductions are made slowly — typically 10% of the current dose every two to four weeks
- The pace is guided by symptom response, not a fixed calendar
- Pregabalin is available as capsules (25mg, 50mg, 75mg, 100mg, 150mg, 200mg, 225mg, 300mg) and oral solution (20mg/ml) — liquid is particularly useful for low-dose tapering
- Gabapentin is available in capsules and tablets (100mg, 300mg, 400mg, 600mg, 800mg) and oral solution (50mg/ml) — the liquid is essential for precise low-dose tapering
- Total taper duration for someone on long-term high-dose treatment may be twelve to eighteen months or more
Key points about stopping pregabalin and gabapentin
- Both are controlled substances in the UK precisely because of their significant dependence risk
- Never stop abruptly — seizure risk is real, particularly at higher doses
- Anxiety that worsens during reduction is almost always withdrawal, not relapse of the original anxiety
- Liquid formulations are essential for precise low-dose tapering
- Pain sensitivity may temporarily increase during reduction in people prescribed for neuropathic pain — this is withdrawal, not the original pain condition worsening permanently
- With a properly planned taper, most people can successfully reduce and stop
The particular challenge of anxiety rebound
One of the most distressing aspects of pregabalin and gabapentin withdrawal — particularly for people prescribed them for anxiety — is the rebound anxiety that emerges when the medication is reduced. This can be so intense that it feels like the original anxiety disorder has returned, or worsened beyond what it was before.
In most cases, this is withdrawal — not relapse. The distinction is important because the correct clinical response is to hold the current dose and allow the nervous system to settle, rather than to increase the dose or abandon the taper. A clear clinical framework for interpreting these symptoms makes an enormous difference to the experience of tapering.
For GPs considering referral
Pregabalin and gabapentin dependence is common and is frequently underrecognised in primary care. We provide specialist assessment and support for patients wishing to reduce these medications, including those who have tried before without success. Our taper plans account for the specific pharmacology of each medication and include guidance on formulation management. We communicate with the patient's GP throughout and can issue private prescriptions as required. We are familiar with the controlled drug requirements for these medications in the UK.
Our approach
How we support pregabalin and gabapentin reduction
We provide consultant-led assessment and tapering support for people wanting to reduce pregabalin or gabapentin. We begin with a full assessment of your history, your current dose, your reasons for wanting to stop, and your stability. We build a bespoke taper plan that takes account of both the pharmacology of the specific medication and your individual clinical picture.
We are particularly attentive to the anxiety rebound that commonly occurs during tapering, and we provide a clear clinical framework for distinguishing withdrawal from relapse — so that symptoms can be interpreted calmly rather than reactively.
- Full psychiatric assessment before any taper begins
- Bespoke taper schedule — 10% reductions at a pace guided by your response
- Advice on liquid formulations for precise low-dose tapering
- Private prescriptions issued throughout, in compliance with controlled drug regulations
- Clear communication with your GP at each key stage
Related reading
Dependence on pregabalin or gabapentin does not mean you are stuck.
It means the nervous system needs a careful, respectful path out — and with the right support, most people can find it.