Treatment guide

Botulinum toxin type A temporarily reduces the signal from nerve to muscle in the small areas it is placed. Treated muscles contract less, so the lines they fold into the skin soften. It is a prescription-only medicine. Effects appear over several days and wear off after a few months.
Skeletal muscle contracts when a nerve ending releases acetylcholine across the junction between nerve and muscle. Botulinum toxin type A interrupts that release at the tiny sites where it is injected. The muscle receives a weaker instruction, contracts less forcefully, and the skin lying over it folds less deeply. The effect is local and it is temporary. New nerve terminals develop over the following months and normal movement returns.
This matters for the results you should expect. The lines that respond best are the ones created by movement, described as dynamic lines. Lines that sit in the skin at complete rest, described as static lines, are a different problem: they involve the skin itself, its collagen and elastin, and often volume loss underneath. Softening the muscle can stop a static line deepening and may improve it slowly over repeated courses, but it will not erase an etched line in one appointment. A practitioner who tells you otherwise is either not looking closely or is selling.
The treatment does not fill anything. It quietens a muscle, and the skin above it gets a rest.
The best candidates are people with visible lines on movement, realistic expectations, and no reason to avoid a prescription medicine. Age is not the deciding factor. Someone in their late twenties with a strong frown and a deep vertical line has a clearer case than someone in their fifties whose main concern is loose skin along the jaw, because loose skin is not a muscle problem.
There are situations where the answer should be no, or not yet:
That last point is the single most common source of disappointment, and it is entirely avoidable. It comes from an assessment, not from a price list.
Botulinum toxin is a prescription-only medicine in the United Kingdom. That has three consequences you can check before you book.
This is worth restating because it inverts the usual assumption. A clinic advertising the brand name loudly with a headline price is not showing you confidence. It is showing you that it either does not know the rule or has decided the rule does not apply to it. Neither is reassuring in someone about to inject a medicine into your face.
There are several botulinum toxin type A products licensed in the UK and they are not interchangeable in dose. Because they are prescription-only medicines, this site describes the drug generically rather than advertising a brand. Ask in your consultation which product is being prescribed and why that one was chosen for you.
Since October 2021 it has been a criminal offence in England to give botulinum toxin or cosmetic filler to anyone under eighteen for cosmetic purposes. Scotland has consulted separately on regulating non-surgical procedures, and the position across the UK has been moving. Any responsible practitioner in Glasgow will decline to treat under-eighteens for cosmetic reasons regardless of where the legislation currently sits.
A first appointment should be longer than the injecting itself. Expect a medical history, questions about medicines and supplements, a discussion of what specifically bothers you, and an assessment of your face at rest and in movement. Photographs taken under consistent lighting are normal and useful. Written consent should cover the risks, the fact that the product is prescription-only, and what happens if you are unhappy.
The injections themselves take a few minutes. Very fine needles are used and most people describe a brief sting. Ice or a topical anaesthetic is sometimes offered but is often not needed. You should be given aftercare instructions before you leave and a review appointment at around two weeks.
Muscle strength is not symmetrical in anyone. A small adjustment at review is a normal part of good practice, not an admission of failure. Ask whether review and any adjustment are included before you book, because a clinic that charges again for a top-up has an incentive to under-dose the first time.
Most people go straight back to work. Small raised bumps at each injection point settle within an hour. Bruising is the most common visible after-effect and is more likely if you take anticoagulants, fish oils or high-dose vitamin E, or if you have had a drink shortly before.
Standard advice for the first day is:
You should be given a way to contact the practitioner, or someone covering for them, outside the appointment. Ask what that route is. Read the full sequence on the aftercare page.
The common effects are minor and short-lived: pinpoint bleeding, bruising, mild headache for a day or two, and a heavy or tight feeling in the forehead while the effect settles.
The ones that need a plan:
Suspected side effects of a medicine can be reported through the MHRA Yellow Card scheme, by you as well as by the practitioner.
Scotland does not regulate this field the way most people assume. Independent clinics where the service is provided by a doctor, dentist, nurse, midwife or dental care professional must register with Healthcare Improvement Scotland and are inspected. Practitioners without a healthcare registration fall outside that scheme, which means two premises on the same Glasgow street can be operating under completely different levels of oversight.
So the useful questions are specific:
The Professional Standards Authority accredits registers of practitioners in this field, which gives you a way to verify claims independently rather than taking a website at its word. Our guide to choosing a clinic in Glasgow works through this in full.
This site publishes no prices, partly because advertising a prescription-only medicine to the public is not permitted and partly because a number without context tells you nothing. What is useful is knowing what you are actually paying for.
The cost of a treatment reflects who assesses you and whether they hold prescribing rights, how much product your anatomy needs, whether review and adjustment are included, the indemnity cover the practitioner carries, and whether the premises are registered and inspected. A very low price usually means one of those has been removed. Work through what drives the cost of treatment before you compare two quotes.
Common questions
Most people describe a brief sharp sting at each point, over in seconds. The needles used are very fine. Ice or numbing cream is available in most clinics but many people decline it.
Movement usually starts to change from around day three, with the full effect settled by about two weeks. Judge the result at the two-week mark, not before.
Commonly three to four months. Duration varies with the area treated, the dose, your muscle strength and your metabolism. Some people find the first course wears off sooner.
No. Movement returns to where it was, so the lines return to how they were. They do not deepen because of the treatment. If a line looks worse it is because you had grown used to seeing it softened.
Practitioners decline cosmetic treatment during pregnancy and breastfeeding because there is no safety evidence to support it. This is a precaution rather than a known harm.
Licensed botulinum toxin type A products differ in formulation and in the units used to measure a dose, so doses are not interchangeable between them. Because they are prescription-only medicines they are not advertised to the public. Ask your prescriber which one they are using and why.
Repeated cosmetic use over many years is common and generally well tolerated. Some people develop reduced response over time. Sensible practice is the smallest effective dose at the longest interval that keeps you happy, rather than a fixed diary entry.
Related reading

01
A medical device rather than a medicine in the UK, which is precisely why the practitioner matters more than the product.
Read

02
Not one procedure but a marketing umbrella over several. Knowing which is which is the whole decision.
Read

03
An umbrella term. The value is in working out which of four separate problems you actually have.
Read
Enquiries
This site does not sell treatment and has no appointment book. What it can do is help you arrive at a consultation with the right questions, and tell you plainly when a procedure is not the answer to the thing that is bothering you.
hello@aestheticlaunchlab.comEnquiries are read and answered by Aesthetic Launch Lab, the UK aesthetics digital specialist that operates this website. Please do not send clinical details or photographs. If something has gone wrong after a procedure, contact the practitioner who treated you, or NHS 111 in Scotland, rather than waiting for a reply here.