Botulinum toxin.
A protein that inhibits the signal from nerve to muscle for a few months – used in small doses against expression lines, and medically for hyperhidrosis, bruxism and migraine.
Botulinum toxin explained simply: how it works, uses in aesthetics and medicine, duration, safety, brand names and what the word 'Botox' really means.
A closer look.
Botulinum toxin type A is a highly purified protein originally derived from the bacterium Clostridium botulinum. At therapeutic doses it blocks the release of the messenger acetylcholine at the nerve ending – the muscle no longer receives a signal and relaxes. The effect is limited to the treated muscle and wears off within months as the body forms new nerve endings.
'Botox®' is the brand name of the first licensed product and is used colloquially for all botulinum toxin products; several products are licensed in Germany. For wrinkle treatment the substance has been licensed since the early 2000s; medically it has been used since the 1980s, for example for strabismus, spasticity, bladder dysfunction, hyperhidrosis and chronic migraine.
Botulinum toxin is prescription-only and may only be used by physicians. The dose is stated in units and is not directly comparable between products. Typical side effects are redness, small bruises and headache; rarely a temporary weakness of neighbouring muscles. It is not used during pregnancy and breastfeeding or with certain neuromuscular conditions.
This lexicon entry is general information and does not replace the medical consultation required under German law (§ 630e BGB).
At a glance.
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Ask via WhatsAppFrequently asked questions.
Is botulinum toxin a poison?
The substance comes from a bacterium but is highly purified and used in tiny, locally acting doses. Used properly it is considered well studied and safe.
What is the difference between Botox and botulinum toxin?
None in effect: Botox® is a brand name, botulinum toxin the active substance.
Can you become resistant?
Rarely. With very short intervals or high doses the body can form antibodies; that is why intervals of at least three months are kept.
Sources and further reading.
- § 630e BGB – duty to inform before treatment (German Civil Code)
- DGBT – German Society for Aesthetic Botulinum Toxin Therapy
- AWMF – German clinical practice guidelines
External links open in a new window; their operators are responsible for their content. Medical responsibility for this page: Katayoun Mostaghimi, specialist in general medicine. Last updated: 2026-10-05.
Related pages.
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