Glovireg is pregabalin, in 25 mg, 75 mg and 150 mg capsules. It is used for nerve pain, epilepsy and generalised anxiety disorder. It is Schedule 5, it is misused, and stopping it suddenly causes a genuine withdrawal syndrome — all of which is worth knowing before starting.
What is Glovireg?
The South African Medicine Price Registry lists Glovireg as Schedule 5 capsules containing pregabalin at 25 mg, 75 mg and 150 mg.
Pregabalin is a gabapentinoid. Despite the name, it does not act on GABA. It binds to the α2δ subunit of voltage-gated calcium channels on overactive nerve endings, reducing the release of the signalling chemicals that carry pain and excitatory messages.
In practical terms, it quietens nerves that are firing when they should not be — which is why it works for nerve pain and epilepsy, and why it does very little for ordinary pain from an injury or inflammation.
Pregabalin and gabapentin are close relatives. Pregabalin is absorbed more predictably, works at lower doses, and reaches effect faster — which makes it easier to dose but also more reinforcing.
The three strengths exist because pregabalin is titrated — started low and increased in steps over days to weeks. Someone might start on 25 mg or 75 mg at night and end up on several hundred milligrams daily. A change in your strength usually means the plan is working, not that anything has worsened.
Schedule 5 status reflects misuse potential. Pregabalin produces a sense of calm and euphoria at higher doses, is misused in some settings, and is particularly dangerous combined with opioids — which is why its control was tightened in South Africa and elsewhere.
What is Glovireg commonly used for?
- Neuropathic (nerve) pain — diabetic neuropathy, post-herpetic neuralgia after shingles, sciatica, nerve pain after injury or surgery. This is its most common use.
- Generalised anxiety disorder, where pregabalin is a registered treatment and works faster than an SSRI.
- Epilepsy, as add-on treatment for focal seizures.
- Fibromyalgia, in some prescribing.
- Restless legs syndrome, as an alternative to dopamine agonists — and increasingly preferred, since it does not cause augmentation.
- Nerve pain in HIV, chemotherapy or spinal disease.
Three points shape whether treatment succeeds:
It is a regular medicine, not a rescue one. Pregabalin has to be taken consistently. It does not work like a painkiller taken when pain strikes.
It takes time. Benefit builds over days to weeks as the dose increases. Many people give up in the first week, when the drowsiness has arrived and the benefit has not.
Ordinary painkillers work poorly for nerve pain, which is why pregabalin gets prescribed at all — paracetamol and anti-inflammatories are largely ineffective for it.
How Glovireg fits into this medicine category
| Group | Examples | Where it fits |
|---|---|---|
| Gabapentinoids | Pregabalin (Glovireg), gabapentin | Nerve pain, anxiety, some seizures, restless legs |
| Tricyclics | Amitriptyline (Trepiline) | Nerve pain at low dose; depression at higher dose |
| SNRIs | Duloxetine, venlafaxine | Nerve pain and mood together |
| Anti-epileptics | Carbamazepine, valproate, lamotrigine | Seizure control; carbamazepine for trigeminal neuralgia |
| SSRIs | Escitalopram, sertraline | First-line for generalised anxiety |
| Sleep agents | Zolpidem and related | Short-term insomnia |
| Ordinary painkillers | Paracetamol, anti-inflammatories | Poorly effective for nerve pain |
See the mental health and neurology medicines hub.
What to check before using Glovireg
The opioid interaction is the most serious. Combining pregabalin with opioid painkillers — tramadol, codeine, morphine — significantly raises the risk of dangerously slowed breathing, and this combination has been the subject of specific safety warnings after deaths. If you take both, that needs to be a deliberate decision by your prescriber.
Also tell your doctor or pharmacist if you:
- Have kidney disease or reduced kidney function. This is the most important routine check — pregabalin is cleared almost entirely by the kidneys, and the dose must be reduced when they are impaired. Otherwise it accumulates and causes marked drowsiness and confusion.
- Take other sedating medicines — benzodiazepines, sleeping tablets, sedating antihistamines — or drink alcohol. The sedation is additive.
- Have breathing problems, especially COPD or sleep apnoea, or are elderly — both increase the risk of respiratory depression.
- Have a history of substance misuse. Pregabalin is misused and can cause dependence.
- Have depression or a history of self-harm. Anti-epileptic medicines carry a small increased risk of suicidal thoughts.
- Have heart failure, where fluid retention matters.
- Are pregnant, planning pregnancy or breastfeeding.
Practical points:
- Do not drive until you are stable on a dose and know your reaction.
- Take it at evenly spaced times, as prescribed.
- Follow the titration exactly.
- Do not stop suddenly. Abrupt withdrawal causes anxiety, insomnia, nausea, sweating, headache and returning pain, and in epilepsy can provoke seizures. Any reduction should be gradual and planned.
- Expect weight gain and ankle swelling as possibilities, and mention them rather than stopping over them.
Possible cautions and when to ask a pharmacist or doctor
The commonest effects, particularly early, are drowsiness, dizziness, unsteadiness, blurred vision, dry mouth, swollen ankles and weight gain. Drowsiness and dizziness usually improve over one to two weeks, which is exactly why the dose is built up slowly.
Seek medical advice promptly for:
- Marked confusion, severe drowsiness or difficulty staying awake — particularly with an opioid or sedative.
- Slow or shallow breathing. Get emergency help.
- New or worsening depression, agitation, or thoughts of self-harm.
- A widespread rash, blistering, or a rash with fever and swollen glands — get emergency help.
- Swelling of the face, lips or tongue, or difficulty breathing.
- Marked swelling of the ankles or sudden weight gain, particularly with heart problems.
Contact your doctor if:
- Pain is not improving once you reach the target dose. Pregabalin does not work for everyone, and there are alternatives.
- Side effects are not settling after the first couple of weeks.
- You find yourself taking more than prescribed, or wanting to.
- Seizure control changes, if you take it for epilepsy.
- Your kidney function changes, or another prescriber starts you on a new medicine.
- You want to stop — so it can be tapered rather than stopped abruptly.
Related medicine guides
Frequently asked questions
What is Glovireg 75 mg used for? Nerve pain — diabetic neuropathy, pain after shingles, sciatica — generalised anxiety disorder, and as add-on treatment for epilepsy. It contains pregabalin.
What is Glovireg 25 mg used for? The same conditions. 25 mg is a starting or step-up strength while the dose is being built up.
Is it a painkiller? Not in the ordinary sense. It calms overactive nerves and must be taken regularly — it does not relieve pain on demand.
How long before it works? Days to weeks, because the dose is increased gradually. Judge it once you reach the target dose.
Is it addictive? It can cause dependence and is misused, which is why it is Schedule 5. Take only the prescribed dose and tell your doctor if you feel you need more.
Can I stop when the pain settles? Not abruptly. Stopping suddenly causes withdrawal symptoms and, in epilepsy, can provoke seizures. Ask for a gradual reduction.
Can I take it with tramadol or codeine? Only if your doctor has decided so deliberately. Combining pregabalin with opioids raises the risk of dangerously slowed breathing.
How is it different from gabapentin? Same class and mechanism. Pregabalin is absorbed more predictably, works at lower doses and acts faster.