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Published on: March 3, 2014
Safety of botulinum toxin type A in children younger than 2 years
Samuel Ignacio Pascual-Pascual1, Ignacio Pascual-Castroviejo
1Pediatric Neurology Service, University Hospital La Paz, Paseo de la Castellana 261, 28046 Madrid, Spain. ipascualp.hulp@salud.madrid.org
Insights
Botulinum toxin type A (BoNT-A) is safe for infants under two years old, with mild side effects like temporary weakness. This study confirms its good safety profile in young children, similar to older patients.
Area of Science:
- Pediatric Neurology
- Pharmacology
- Clinical Trials
Background:
- Botulinum toxin type A (BoNT-A) is approved for spasticity in children over 2 years old.
- Limited data exists on BoNT-A use in infants under 2 years.
Purpose of the Study:
- To retrospectively evaluate the safety of BoNT-A in infants under 2 years old.
- To analyze adverse events in this young patient population.
Main Methods:
- Retrospective review of 74 infants treated with BoNT-A.
- Infants were divided into two groups: under 1 year and 1-2 years old.
- Data on indications, dosages (Botox, Dysport), and adverse events were collected.
Main Results:
- Common indications included obstetric brachial palsy (OBP) and cerebral palsy (CP).
- Adverse events were infrequent (3.6% in the first year, 6.5% in the second year).
- Reported adverse events were mild weakness or tiredness, resolving within 1-4 days.
Conclusions:
- BoNT-A demonstrates a favorable safety profile in infants under 2 years old.
- Adverse events observed are comparable to those in older pediatric populations.
- BoNT-A is a safe treatment option for infants requiring management of conditions like spasticity.
Background:
Botulinum toxin type A (BoNT-A) has been used in many indications and is licensed for the treatment of spasticity in children older than 2 years. However, there are few reports of BoNT-A treatment in patients younger than 2 years of age.
Aims:
To review retrospectively the safety data from all infants treated with botulinum toxin type A (BoNT-A) before 2 years of age in a paediatric neurology unit.
Methods:
There were 74 infants: 28 received the first dose before 1 year of age, and 46 between the ages of 1 and 2 years.
Results:
In the first year of life, the most frequent indication was obstetric brachial palsy (OBP) (71.4% of cases) and in the second year, cerebral palsy (CP) (73.9%). Both Botox and Dysport, the two commercially-available BoNT-A products in Spain, were used. The average starting dose by session was 6.55 U/kg body weight Botox in infants in their first year of life, and 8.4 U/kg body weight Botox and 21.1 U/kg body weight Dysport in the second year of life. Only 3.6% of cases treated in the first year and 6.5% of those treated in the second experienced adverse events (AEs), which consisted of mild weakness or tiredness lasting 1-4 days.
Conclusions:
BoNT-A has a good safety profile in infants younger than 2 years old. AEs are similar to those found in older children.
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