Overview
“Botox.” A purified neurotoxin that temporarily relaxes specific muscles to smooth wrinkles (or treat migraines, sweating, etc.).
It is extremely potent and dosed in tiny “units”, this is a professional, prescription procedure and must never be self-injected.
What It Does
Botulinum toxin type A blocks acetylcholine release at the neuromuscular junction, temporarily paralyzing the injected muscle (effects last ~3– 4 months).
Cosmetically it softens dynamic wrinkles; medically it treats migraine, hyperhidrosis, spasticity, and more.
Dosed in units; reconstitution and placement are precise and clinician-only.
RECONSTITUTION (CLINICIAN)
| Vial | Saline (0.9% preserved) | Concentration | Note |
|---|---|---|---|
| 100 U | + 2.5 mL | 4 U / 0.1 mL | Common dilution. Other dilutions used per technique. Clinician-only. |
TYPICAL AESTHETIC DOSING (UNITS)
| Area | Frequency | Dose | Notes |
|---|---|---|---|
| Glabella (frown lines) | Every 3–4 months | ~20 U (5 points) | FDA-approved cosmetic dose. |
| Forehead lines | Every 3–4 months | ~10–20 U | Often combined with glabella (~40 U upper face). |
| Crow’s feet | Every 3–4 months | ~12 U per side Critical: max cumulative ~400 U per 3 months. Precise muscle placement determines safety, wrong placement causes drooping eyelids/brows, asymmetry, or swallowing/breathing problems. This is a clinician-administered prescription drug, do not self-inject. By sex: Dosed by muscle / treatment area, not sex (men often need slightly more units for larger muscles). Contraindicated in pregnancy & breastfeeding. |
Handling & Stacking
Injection site
Specific target muscles, clinician-placed. Never DIY.
Storage
Refrigerate 36–46°F; use reconstituted product within hours–days per label.
Side effects
Bruising, headache, eyelid/brow droop, asymmetry, dry eye; rarely toxin spread (difficulty swallowing/breathing; emergency).
What to expect
Smoothing of treated lines over 3–7 days, lasting ~3–4 months, then repeat. Supply math 100U → one upper-face treatment (~40–60 U) with margin, clinician-dependent.
Pairs well with
Dermal fillers / topical anti-aging (clinician-coordinated). Not a self-administered stack
Avoid
Self-injection (never). Neuromuscular disorders (myasthenia gravis, ALS, Lambert-Eaton). Infection at site. Pregnancy/lactation. Aminoglycoside antibiotics
Safety & Patient Education
Contraindications
Self-administration (this is a clinician-only prescription drug) Neuromuscular junction disorders (myasthenia gravis, Lambert-Eaton, ALS) Infection at the injection site Pregnancy and lactation; known hypersensitivity
Warnings
Boxed warning: toxin spread, distant effects (swallowing/breathing difficulty) can be life-threatening Eyelid/brow ptosis, asymmetry from misplacement Potency varies by product/brand, units are NOT interchangeable Counterfeit/underground product carries serious risk
Drug interactions
Aminoglycoside antibiotics, muscle relaxants: potentiate the toxin Anticoagulants: increased bruising Other neuromuscular-blocking agents: additive effect
Labs
None routine; medical history and neuromuscular screening beforehand
Stop criteria
Difficulty swallowing, speaking, or breathing; emergency care immediately Significant eyelid droop or vision change Signs of allergic reaction
Patient education
Clinician-administered prescription drug, never self-inject or use underground product Brand units are not interchangeable Effects last ~3–4 months Seek emergency care for any swallowing or breathing difficulty
References
rxlist · dailymed · PubMed
