Botulinum Toxin Injection (Botox)

Botulinum toxin injections are used medically in eye care to quiet overactive eyelid or facial muscles by blocking nerve signals for a few months at a time. OnabotulinumtoxinA (Botox) is FDA-approved for blepharospasm and strabismus in patients 12 years and older; incobotulinumtoxinA (Xeomin) is FDA-approved for adult blepharospasm. Other toxin products may be used off-label, and units are not interchangeable between brands.

Common Uses

• Blepharospasm, where blinking turns into forceful squeezing
• Hemifacial spasm, often a persistent one-sided facial twitch
• Selected strabismus cases, especially when a temporary weakening effect is useful
• Protective ptosis, an intentional lid droop used in special corneal-protection situations

What to Expect

Before Injection

• Review medical history, especially swallowing or breathing problems, neuromuscular disease, and prior toxin reactions
• Discuss previous responses if you have had injections before
• Ask about blood thinners; do not stop them unless the prescribing doctor says it is safe

During Injection

• A very small needle is used
• Several injection points may be placed around the eyelids, brow, or cheek
• The feeling is usually a brief pinch
• Most visits take 10-15 minutes
• Topical numbing is not usually needed, though some offices use ice or vibration for comfort

After Injection

• Normal activities can usually resume right away
• Avoid rubbing the injection sites for several hours so the medication does not spread where it should not
• Effects usually start in 2-5 days
• Peak benefit is often around 1-2 weeks, which is when fine-tuning decisions make more sense

How Well It Works

Blepharospasm

Most patients get meaningful relief, often enough to improve reading, driving, or keeping the eyes open comfortably. Response rates above 90% are commonly reported in well-selected patients.

Hemifacial Spasm

Relief is often substantial, though the spasm may not vanish completely. Many patients prefer repeat injections every few months over neurosurgery, at least initially.

Side Effects

Common (Temporary)

• Bruising at injection sites
• Mild ptosis (droopy eyelid)
• Dry eye
• Tearing

Less Common

• Weakness of nearby muscles
• Difficulty closing eye
• Blurred vision (temporary)

Duration

• Local side effects are usually temporary (weeks)
• Rare distant-spread effects can cause serious swallowing, speech, or breathing problems. Call 911 for trouble breathing, choking, severe swallowing difficulty, or rapidly worsening weakness.

Repeat Treatments

• Effects usually last about 3-4 months
• Regular injections are needed for ongoing control
• Dose and injection pattern are adjusted over time; the first visit may not establish the final maintenance pattern
• True tolerance is uncommon, but response can drift and need recalibration

Finding an Experienced Provider

Medical botulinum toxin injections for eyelid and facial spasms use different dosing and injection patterns than cosmetic treatment. Look for a neuro-ophthalmologist or ophthalmologist who regularly treats blepharospasm, hemifacial spasm, and eye-movement problems. Hashemi Eye Care offers medical botulinum toxin treatment for these conditions.

Frequently Asked Questions

Is medical Botox the same as cosmetic Botox?

The medication may be the same brand, but the goal, dose, and injection pattern are different. Medical treatment targets eyelid, facial, or eye-movement muscles to reduce spasms or selected forms of misalignment.

What if my eyelid droops after treatment?

Temporary ptosis can happen if toxin affects the eyelid-lifting muscle. It usually improves as the medication wears off. Tell your clinician because the next injection pattern can often be adjusted.

Do injections become less effective over time?

Most patients continue to respond. If benefit shortens or side effects increase, the dose, placement, interval, or toxin formulation may need adjustment.

When should I call after an injection?

Call the office if a side effect interferes with vision, eye closure, or daily function. Call 911 instead of waiting for a callback if you develop breathing trouble, choking, severe swallowing problems, or rapidly spreading weakness.