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Crotoxin, extracted from the venom of the South American rattlesnake Crotalus durissus terrificus, has been studied for almost a century for its analgesic, anti-inflammatory and antitumor activities and as an even more powerful muscle paralyzer than botulinum toxin. However, the toxicity of crotoxin limits its medicinal use. A new study, published by Brazilian researchers in the journal Toxins, shows that crotoxin's therapeutic effects can be enhanced and its toxicity reduced when it is [...]