Transient ischaemic attack (TIA, mini-stroke)
A transient ischaemic attack is a stroke that stopped by itself. The blood supply to part of the brain was cut off briefly, the same symptoms appeared as in…
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On this page
- Why this is urgent even though you feel fine
- Signs that mean calling an ambulance
- What to do in the first few minutes
- What looks like a TIA but is not
- Where the blockage comes from
- What gets checked in the first few days
- The treatment that genuinely lowers stroke risk
- Driving and ordinary life afterwards
- Online consultation
Medicines commonly prescribed for Transient ischaemic attack (TIA, mini-stroke)
For informational purposes only. Always consult a doctor before using any medicine.
Dosage form: TABLET, 40 mg simvastatinActive substance: simvastatinManufacturer: Teva Pharma S.L.U.Prescription requiredDosage form: TABLET, 75 mg clopidogrelActive substance: clopidogrelManufacturer: Dermogen-Farma S.A.Prescription requiredDosage form: TABLET, 40 mg simvastatinActive substance: simvastatinManufacturer: Tecnimede España Industria Farmaceutica S.A.Prescription required
A transient ischaemic attack is a stroke that stopped by itself. The blood supply to part of the brain was cut off briefly, the same symptoms appeared as in a real stroke, and then the clot broke up, the flow returned and everything cleared: within minutes, less often within an hour or two. The person feels exactly as before and draws the only conclusion that looks logical at first glance, that they got away with it. That conclusion is wrong, and this whole page exists because of it. The symptoms have gone; the danger has not.
Why this is urgent even though you feel fine
A TIA is not a mild version of a stroke but a warning that one may be coming. Whatever blocked the vessel once is still there: a plaque in the carotid artery, an irregular rhythm throwing clots out of the heart. Next time the clot may stay put for longer, and then it is a stroke with permanent brain damage.
The risk is not spread evenly over years; it is concentrated right at the start. The danger is greatest in the first forty-eight hours after the episode, stays high through the whole of the first week, and falls away gradually over the month. Some strokes happen in precisely the hours during which the person is deciding whether it is worth troubling a doctor.
The good news is that moving fast changes the outcome dramatically: assessment and treatment started within the first day cut the chance of a subsequent stroke several times over. This is not about heroics but about a tablet that thins the blood, an irregular rhythm found and treated, a narrowed neck artery picked up in time. Hence the practical conclusion: an appointment "next week" is not an adequate answer to a TIA. The assessment belongs on the same day, and if the episode has only just happened, straight away, by ambulance.
Signs that mean calling an ambulance
It all begins abruptly: it does not build over an hour but arrives fully formed, in the middle of something ordinary.
Three signs are widely known, and they genuinely are the commonest:
- the face has dropped on one side: the corner of the mouth sags, the smile comes out crooked, the eyelid will not lift;
- an arm will not hold up: raise both arms in front of you and one drifts down, or will not rise at all; the same can happen with a leg;
- speech has changed: the words come out slurred, the wrong word arrives instead of the intended one, or the person cannot follow what is said to them although they look wide awake.
But the memory aid stops there, and a TIA does not. At least half of all episodes look different, and it is those that get put down to tiredness, blood pressure or a draught. Call an ambulance just the same if any of the following appears suddenly:
- loss of vision in one eye only, as though a curtain came down or everything washed over grey; it lasts minutes and clears. This is the classic sign of trouble in the carotid artery, and it is almost always ignored;
- double vision, or loss of half the field of view in both eyes;
- dizziness with an inability to stay upright: not mild light-headedness but the floor going, with the person pulled to one side;
- sudden confusion: they stop understanding where they are and what is going on, and answer at cross purposes;
- numbness or loss of feeling down one side of the face, in an arm or in a leg;
- sudden clumsiness of one hand: buttons will not fasten, objects slip out of the fingers;
- sudden difficulty swallowing;
- a very severe headache that arrived in an instant, "like a blow", particularly with nausea or vomiting.
What to do in the first few minutes
The governing rule runs as follows: it is impossible to tell a transient ischaemic attack from a stroke while it is happening. Not for the person, not for their family, not for a doctor on the telephone. In the first minutes the two are identical, and the difference emerges afterwards, from whether it cleared or not. So the decision is always the same: call an ambulance immediately, without waiting to see whether it passes.
If the symptoms disappear while the ambulance is on its way, do not cancel the call and go about your day. The assessment is needed now, not at some later point.
While you wait:
- Note the exact time everything started. This is the single most valuable piece of information for the medical team: whether clot-dissolving treatment can be used, should it turn out to be a stroke, depends on it.
- Give nothing to eat or drink, because swallowing may be affected. Do not give medicines on your own initiative either, blood pressure tablets and aspirin included.
- Lay the person on their side if they are drowsy or nauseated, and gather a list of the medicines they take, above all any that affect clotting.
- Do not drive them in yourself: they may deteriorate on the way, whereas the ambulance crew start treating sooner and take them to a unit equipped for this.
If the episode was some days ago and has passed, an ambulance is not needed, but a doctor the same day is, rather than an appointment in a week's time.
What looks like a TIA but is not
Similar episodes happen for other reasons. Sorting them out yourself is not the idea, since that is the doctor's job, but knowing that alternatives exist is worth something.
- Migraine with aura. It unfolds gradually, over five to twenty minutes, and usually adds things rather than taking them away: shimmering zigzags, bright patches, a tingling that creeps along. In a TIA, by contrast, a function drops out and everything arrives in an instant.
- A faint, with loss of consciousness, often in a stuffy room, with pain, or on standing up quickly. In a TIA consciousness is usually preserved.
- A seizure, after which an arm or a leg stays weak for a while.
- Low blood sugar in someone with diabetes: sweating, trembling, confusion, all of it settling after food.
- Benign positional vertigo: spinning triggered by turning the head, lasting under a minute, with no other neurological signs.
All of this is analysis after the event. At the time, there is one decision: call an ambulance.
Where the blockage comes from
The vessel is blocked by a clot that travelled in from elsewhere, or by a fragment shed from a crumbling cholesterol plaque. There are only a few places these come from, and the treatment depends on which one is yours.
- Atherosclerosis of the carotid arteries. A plaque in the neck narrows the channel, its surface breaks down, and particles come away and travel straight to the brain. This is the cause that most often shows itself as loss of vision in one eye.
- Atrial fibrillation. Blood pools in the upper chambers of the heart, clots form and are carried up to the brain. This rhythm often goes entirely unfelt and is found only by looking for it deliberately, which is the point of monitoring the heart rhythm for days after a TIA.
- Small vessel disease of the brain, usually the result of years of high blood pressure and diabetes.
- A tear in the wall of a neck artery, an uncommon but important cause. It turns up in young and middle-aged people, often after an injury to the neck, a sharp movement or a manipulation, and usually comes with pain in the neck or the back of the head. That is why these symptoms in a young person are no licence to decide "people my age do not have strokes".
- Less often: heart valve and other cardiac disease, clotting disorders, inflammation of the vessels.
What speeds the whole process along is smoking, high blood pressure, high cholesterol, diabetes, excess weight, sitting still and regular alcohol. Age and family history matter too, but unlike the rest they cannot be altered.
What gets checked in the first few days
The purpose of the assessment is not to prove that a TIA occurred: the symptoms have gone and there is nothing left to confirm. The purpose is to find the cause, because the treatment follows from it.
- Examination by a neurologist and detailed questioning: exactly which function was lost, how quickly it came on, how long it lasted. It helps enormously if a relative watched the episode from the outside.
- A brain scan, either computed tomography or magnetic resonance imaging. MRI in a particular sequence often shows a tiny area of damage even where the symptoms have entirely cleared.
- An ECG and a prolonged recording of the heart rhythm, from a day to several weeks. Atrial fibrillation comes in bouts and a short tracing can miss it.
- Ultrasound of the neck vessels: whether the carotid artery is narrowed and by how much.
- Blood pressure followed over time, often with a twenty-four-hour recording, and blood tests: cholesterol and its fractions, glucose and glycated haemoglobin, clotting.
- An ultrasound of the heart, if the clot is suspected to have come from there.
Much of this is done as an inpatient or in a specialist clinic within a day or two, precisely because it cannot wait.
The treatment that genuinely lowers stroke risk
This is the most encouraging part. What is prescribed after a TIA is not general-purpose prevention but specific measures with proven effect.
- Antiplatelet medicines, which stop platelets sticking together. They are started at once; sometimes two are combined for the first few weeks and then one is continued long term.
- Anticoagulants instead of antiplatelets if atrial fibrillation is found. That is a different situation and a different class of drug, which is why the rhythm is pursued so doggedly.
- Lowering blood pressure, the most powerful lever of all: nothing else influences stroke risk as much.
- Statins, including where cholesterol is only moderately raised, because they do not merely lower the number but stabilise the plaque itself.
- Surgery or a stent in the carotid artery where the narrowing is marked. The benefit is greater the sooner it is done, so it is planned for the coming weeks.
- Diabetes control and treatment of other conditions adding to the risk.
- Stopping smoking, the one change of habit comparable in force to the medicines. Less salt in food, movement and moderation with alcohol count too.
One thing derails the plan more often than anything else: the person feels perfectly well and, a few months on, stops the tablets. The protection lasts exactly as long as they are taken. If something does not suit, whether side effects, cost or inconvenience, that is a conversation with the doctor and a change of drug, not a treatment quietly abandoned.
Driving and ordinary life afterwards
A TIA leaves nothing behind, and within days the person is living as before. Two points are still worth spelling out.
You must stop driving for a period after a TIA. The risk of a repeat is highest in the first weeks, and an episode at the wheel is dangerous to the driver and to everyone else. The exact interval and the terms of going back are set by your doctor: the rules differ from country to country, and for professional drivers of buses, lorries and taxis the requirements are always stricter and the intervals longer. Ask about it at the appointment, and while you are there find out whether you need to inform your insurer.
The rest comes back sooner: working, walking and flying are usually possible soon after the assessment unless your doctor says otherwise, and physical activity is not forbidden but recommended, built up gradually.
Most important of all: someone who has already had a TIA must call an ambulance for a repeat of the symptoms just as promptly as the first time. Past experience that "it goes away on its own" is no help here; it is a trap.
Online consultation
An online appointment fits once the acute situation has been dealt with, and it covers everything that comes afterwards well. The doctor will go through your results with you, the scan, the rhythm monitoring, the ultrasound of the neck vessels, will explain why this particular set of medicines was chosen and how long it is to be taken, and will help with side effects and with measuring your blood pressure at home. Separately you can discuss what to do if the symptoms return and when you can go back to driving and to work. If the episode was a while ago and was never investigated, the appointment will produce a plan: which tests are needed and within what timeframe.
Symptoms happening right now, or a few hours ago, are not for an online appointment: that is a call for an ambulance.
This material is for information only and does not replace medical advice.
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