Allergan Botox 100 IU

Last Updated on 05/29/2026 ✔ Medically Reviewed by Dr. Arjun Srivastav

What Is Allergan Botox 100 IU?

Allergan Botox 100 is an injectable prescription medication containing Botulinum Toxin Type A. It is commonly used for both cosmetic and medical purposes to temporarily relax muscles.

It is widely used to reduce facial wrinkles and fine lines, and it may also be prescribed for certain muscle and nerve-related conditions.

Allergan Botox 100 IU is a medicine for which you need a prescription. It has Onabotulinumtoxin, which is a toxin made by the bacterium Clostridium botulinum.

This toxin helps to relax muscles for a time by stopping signals from nerves, which helps to stop muscles from getting the message to move.

The medicine works by blocking a chemical called acetylcholine from being released. Allergan made Botox first.

Clinical Indications

• For wrinkles and fine line removal
• Neurological & Muscle Disorders
• Chronic Migraine:
• Bladder problems:
• Underarm sweating

Composition:

Active Ingredient:

OnabotulinumtoxinA (100 Allergan Units)

Dosage Form:

Injection

Appearance of the Vial and Content:

The Allergan Botox 100 IU looks different. This is because the little bottle seems empty when you look at it before you get it ready to use.

Manufacturer:

Allergan India Pvt Ltd

Onset Of Action:

Initial Signs:

You see a few mild changes within 2 to 4 days post-injection.

Peak Effect:

The maximum clinical effect comes after 2 weeks.

Mechanism Of Action Of Allergan Botox 100 IU:

Step 1:

How Botox Works: The Botox molecule sticks to the nerve endings. These are called motor neurons.

Step 2:

Getting Inside the Cell: The nerve cell then swallows the toxin. It brings the toxin inside the cell in a bubble called a vesicle. The Botox molecule and the nerve cell work together in this step.

Step 3:

Translocation: The toxin gets out of that bubble inside the nerve cell and goes into the main liquid part of the cell, which is called the cytosol.

Step 4:

Cleavage, also known as The Cut: This is an important step for Botox. Botox is a kind of enzyme that can cut proteins.

What Botox does is it looks for a protein called SNAP-25, which is a crucial part of the SNARE team that helps things dock. Then Botox cuts SNAP-25. The SNARE team is important. Snap-25 is a vital member of the SNARE team.

Benefits Of Allergan Botox 100 IU:

Chronic Migraine treatment:

It is one of the treatments that the TGA says is okay to use for chronic migraine. It really helps people who get migraines; it reduces the number of days they get headaches.

Multiple Sclerosis:

It also helps people with palsy, people who have had a stroke, or people with multiple sclerosis.

Stops Underarm Sweating:

It completely stops underarm sweating for several months. This really helps people feel more confident and comfortable in situations.

Urination assistance:

For people with bladders that do not get better with regular medicines, Botox can help. It reduces how often they need to urinate and how urgent it feels.

Dosage Details Of Allergan Botox 100 IU:

• Glabellar Lines (Frown): 20 units of the injection given in five different doses and areas.
• Crow’s Feet: 24 units given in six different sites.
• Chronic Migraine: 155 units given in 31 different areas.
• Primary Hyperhidrosis: 50 Units underarm
• Adult Spasticity: depending on 75–400 Units as per severity.

Missed Dose

The effects of missing your dose may result in loss of effects and loss of the maintenance follow-up doses.

Overdose

If you get too much Botox, it is not good for you. This can happen if the doctor puts too much of the toxin in your body or if you get injections too often. When this happens, your muscles can become very weak. You can have other problems that affect your whole body.

Drug Interactions Of Allergan Botox 100 IU:

1. Severe Interactions

Aminoglycoside Antibiotics: Avoid using-

• Gentamicin
• Amikacin

As it can enhance the muscle-relaxing effect of Botox.

Muscle Relaxants: Avoid pills like-

• Baclofen
• Cyclobenzaprine
• Carisoprodol

This can lead to additive muscle weakness. This is particularly relevant when treating conditions like spasticity.

Neuromuscular Blockers: Avoid other neuromuscular blocker medicines like-

• Atracurium
• Vecuronium
• Rocuronium

It may have a more profound or prolonged effect in patients who have recently received Botox.

Other Botulinum Toxins: Avoid other brands-

• Dysport
• Xeomin

With Allergan, it can simply cause an overdose.

2. Anticholinergic Interactions

Botox stops acetylcholine from being released. Some drugs that have properties can make the side effects of Botox worse, like-

• Oxybutynin
• Benztropine
• Scopolamine

3. Medications That Increase Bruising/Bleeding

These substances do not react with the toxin. However, they can make it harder to give the treatment. Can also make the recovery process more difficult. Avoid-

• Anticoagulants & Antiplatelets
• NSAIDs
• Herbal Supplements

Precautions And Warnings Of Allergan Botox 100 IU:

With Existing Health Conditions

Botox must not be used in patients with:

• Infection at the site
• Bladder Conditions like urinary incontinence or UTIs
• With other neuromuscular disorders, e.g., Myasthenia Gravis or ALS
• Breathing/swallowing issues
• Cardiovascular issues of arrhythmia and myocardial infarction
• Seizures

The “Boxed Warning”: Distant Spread Of Toxin

The big problem with Botox is that it can move from where it was put into your body. The toxin, in Botox, can spread to parts of your body beyond where it was injected.

Lifestyle & Activity Precautions

Driving and Machinery:

Patients should avoid driving or operating heavy machinery until they are certain the treatment has not caused any dizziness, muscle weakness, or vision impairment.

Gradual Resumption:

Those who have been inactive due to the condition being treated (like spasticity) should resume physical activity gradually to avoid injury.

Pregnancy And Breastfeeding

Pregnancy:

This is not usually an idea. The TGA says it is a Category C, which means it should only be used if it will really help the mother, and the good it does is more than the bad it could do to the baby. We do not have a lot of information about how this affects people.

Breastfeeding:

There is no information on whether Botox goes into breast milk. So, it is not advised for breastfeeding mothers to use Botox.

Storage Details Of Allergan Botox 100 IU:

Store the vial in conditions of-

• Temperature: Within 2°C and 8°C
• Light Protection: Avoid direct sunlight.

Where To Buy Allergan Botox 100 IU:

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