Pregabalin
Pregabalin binds the alpha-2-delta subunit of voltage-gated calcium channels, damping the release of excitatory neurotransmitters in overactive neural circuits. Compared with gabapentin its absorption is more predictable. It is used for neuropathic pain and for generalised anxiety.
It works with or without food. Sedation, dizziness and blunted concentration are the usual early effects and are amplified by alcohol and other sedating medicines, so driving and machinery need care until the response is clear. Appetite increase, weight gain and fluid retention appear in some people over the longer term. Pregabalin is cleared by the kidneys, so creatinine and eGFR are followed and matter more as kidney function declines. It carries genuine dependence potential — craving, dose escalation and misuse are documented — and stopping suddenly can cause insomnia, sweating, nausea, anxiety or seizures, so changes belong with the prescriber.
See a doctor for swelling of the legs or a rapid unexplained gain in weight, for breathing that becomes slow or laboured, or for a rash, blisters or facial swelling. Worsening mood, thoughts of self-harm, or a sense of needing more of the drug than prescribed also warrant a conversation.
Reference information, not medical advice. Discuss any change with your doctor.