Injectables / LANGEVIAX
If a line deepens with frowning or smiling, reducing muscle activity may help. Treatment choice depends on movement, eyelid and brow anatomy, and your own goal.
Sources checked: 17 October 2026 · Independent clinical review of all pages is not complete.
Muscle activity, rather than volume
Botulinum toxin type A temporarily reduces nerve signalling to a targeted muscle. This can soften expression lines, while hollowness, pigment and excess skin have different causes. Preparations have product-specific potency units that consumers cannot equate or convert. A price per “unit” is therefore not a meaningful comparison without identifying the preparation and treatment goal.
Section sources: AAD · Botulinum toxin overview · DailyMed · Botulinum toxin label: product-specific units and warnings
What counts as a useful result?
A useful goal might be a softer frown line with an acceptable amount of movement. Matched photographs at rest and during expression are more informative than selfies under changing light. Cochrane evidence mainly concerns glabellar lines; success there does not establish removal of every wrinkle or the need for preventive injections in everyone.
Section sources: Cochrane · Botulinum toxin A for facial wrinkles (2021; evidence through May 2020)
What changes suitability?
Discuss neuromuscular disease, swallowing or breathing problems, previous eyelid weakness or drooping, allergies and earlier treatments. Pregnancy, pregnancy plans and breastfeeding also need an explicit discussion. Infection or inflammation at a proposed treatment site must be assessed first. A questionnaire or photograph cannot replace examination and medication review.
Section sources: Health Canada — Cosmetic injections · AAD · Preparing for botulinum toxin consultation
Prepare for the consultation
Bring prescription medicines, over-the-counter products, supplements and the date of your last injections; do not stop prescribed treatment yourself. Ask for the exact preparation, its Canadian authorization and the clinician responsible for follow-up. Clarify the full cost, review timing and response to asymmetry before purchasing a package. Choosing no procedure remains a reasonable option.
Section sources: AAD · Preparing for botulinum toxin consultation · Health Canada · Drug Product Database
The result develops over days
The same-day appearance is not the final result; effects generally begin over several days and are temporary. Small bruises or tenderness can occur. Agree on a suitable assessment and review date, rather than rushing an early correction. Follow the clinic’s written instructions for exercise, touching the area and other procedures instead of borrowing another person’s schedule.
Section sources: AAD · Botulinum toxin overview · AAD · Botulinum toxin questions and aftercare
Simple supportive skin care
For intact, dry skin, discuss a gentle cleanser and fragrance-free moisturizer; no cosmetic serum activates the injection or guarantees longer duration. Avoid massaging or forcefully rubbing the treated area. If a product stings or the skin is irritated, seek advice before adding acids, retinoids or new products. Makeup and routine-care timing should reflect the condition of the treatment sites.
Section sources: American Academy of Dermatology — Dermatologists' top tips for relieving dry skin · AAD · Botulinum toxin questions and aftercare
When waiting is unsafe
Breathing, swallowing or speech difficulty, or generalized weakness after injection, needs immediate medical assessment; call 911 for breathing trouble or severe symptoms. Report new eyelid drooping, double vision or painful eye dryness promptly. Expanding redness, warmth, drainage or fever should not be dismissed as “detoxification” or an automatically normal reaction.
Section sources: Health Canada — Cosmetic injections · DailyMed · Botulinum toxin label: product-specific units and warnings
My consultation question sheet
Choose the questions to take with you. These selections are not sent to a clinic or saved to an account.
Printed sheet: the final procedure and product choice require consultation.
Frequently asked questions
Will facial sensation disappear?
The intended action reduces muscle contraction rather than numbing facial sensation. Persistent numbness or an unexpected change should be reported for assessment.
Section sources: AAD · Botulinum toxin questions and aftercare
Will a line visible at rest disappear?
It may soften, but line depth, sun damage and tissue changes can limit the response. Ask what is achievable and whether another option better fits the concern.
Section sources: Cochrane · Botulinum toxin A for facial wrinkles (2021; evidence through May 2020) · AAD · Preparing for botulinum toxin consultation
Why might two clinics quote different unit counts?
Preparations, muscle assessment and goals differ. Units across preparations are not directly comparable; compare the complete plan and total cost.
Section sources: DailyMed · Botulinum toxin label: product-specific units and warnings
Related guides to explore
Sources and context
Canadian sources take priority for regulatory context. FDA or other foreign information does not establish Canadian authorization for a product or use. A source-check date is distinct from publication date or independent clinical approval.
- AAD · Botulinum toxin overviewsociety · 2026-10-17
- DailyMed · Botulinum toxin label: product-specific units and warningsregulator · 2026-10-17
- Cochrane · Botulinum toxin A for facial wrinkles (2021; evidence through May 2020)review · 2026-10-17
- Health Canada — Cosmetic injectionsCanadian regulator: consumer safety guidance · 2026-10-17
- AAD · Preparing for botulinum toxin consultationsociety · 2026-10-17
- Health Canada · Drug Product Databaseregulator · 2026-10-17
- AAD · Botulinum toxin questions and aftercaresociety · 2026-10-17
- American Academy of Dermatology — Dermatologists' top tips for relieving dry skinUS specialist society guidance; general barrier-care principles, not a laser-product trial · 2026-10-17
A next step that fits your question
Use Care to review related topics and prepare for a conversation. The product-label service can help organize ingredient information. The tools do not establish procedure candidacy or diagnose a complication.