A muscle locked in contraction is its own kind of pain, and an ordinary painkiller barely touches it because the problem is the contraction itself.
Baclofen acts in the spinal cord to reduce the signals driving that contraction.
Without prescription, plain packaging. After prolonged use, stopping abruptly is dangerous.
Worth distinguishing, because the treatment approach differs.
Spasticity is a continuous increase in muscle tone caused by damage to the nerve pathways descending from the brain. It occurs in multiple sclerosis, after spinal cord injury, after stroke and in cerebral palsy. It is ongoing and requires ongoing treatment.
Acute muscle spasm is a muscle seizing up around an injury or a strained back. Short-lived, and treated short-term.
Baclofen is used for both, but the duration of treatment is completly different.
How it works in the spinal cord
Muscle tone is set by signals passing through the spinal cord. GABA is the main inhibitory messenger in that system — the brake.
Baclofen acts on a particular GABA receptor subtype in the spinal cord.
Activating it reduces the release of excitatory messengers in the reflex pathways that drive muscle contraction. The reflexes become less reactive, and tone falls.
Which is why it works where a simple painkiller does not. It is addressing the contraction rather than the sensation it produces.
Never stop it suddenly after long use
This is the most important safety point on the page.
After weeks or months, abrupt discontinuation can cause a severe withdrawal reaction: a dramatic rebound in muscle tone and spasms, high fever, confusion, agitation, hallucinations, and in serious cases seizures.
That is a medical emergency, not an unpleasant few days.
So it is tapered down over weeks under supervision — and, practically, that means not letting the supply run out unexpectedly.
Short courses for acute spasm do not carry the same risk, but the habit of tapering rather than stopping dead is a good one.
Start low, go slow
Begin with a low dose, divided across the day.
Increase gradually over days to weeks.
With or after food, which reduces stomach upset.
Space the doses evenly.
Drowsiness and weakness in the first days are common and usually ease. Increasing too fast is what makes them intolerable.
The useful-tone problem
Something people with spasticity discover and find counterintuitive.
Increased muscle tone is not always purely a problem. Some people rely on stiffness in the legs to stand or transfer. Reduce the tone too much and standing becomes harder, not easier.
Which means the goal is not minimum tone. It is the amount that reduces pain and spasm while preserving function.
That balance is individual and takes adjustment, and it is why the dose is not simply pushed as high as tolerated.
Possible side effects
Drowsiness, especially early
Muscle weakness
Dizziness
Nausea
Dry mouth
Confusion, mainly in older people
Difficulty passing urine
Low mood
It is cleared largely by the kidneys, so reduced kidney function means a lower dose. Older people are more sensitive to confusion and falls.
Alcohol and sedatives
The sedation stacks with anything else sedating — alcohol, sleeping tablets, strong painkillers, some antihistamines.
Find out how it affects you before driving.
What helps alongside
Stretching, consistently — this does more than most people expect
Physiotherapy, with a programme rather than ad hoc
Heat before stretching
Treating things that provoke spasm: infections, constipation, pressure sores, tight clothing
That last point is frequenly missed. A urinary infection or constipation can noticeably worsen spasticity, and treating it works better than increasing the dose.
Ordering without prescription: how it works
Because this cannot be stopped abruptly after prolonged use, an interrupted supply is a real risk rather than an inconvenience.
Pick the strength and the pack size, put in a delivery address, confirm. Couple of minutes, any time of day, no queue and no conversation across a counter.
It goes out in plain packaging. No pharmacy name on the outside, nothing that hints at what is inside. How long delivery takes depends on where the parcel is headed.
On price it comes down to strength and pack size. Larger packs generally work out better per unit.
Parcels leave on working days, so UK public holidays and weekends push everything back. If it matters to a date, order with a few days to spare rather than none. Nobody can promise a calendar day.
