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Arch Int Pharmacodyn Ther · Dec 1976
The local anesthetic activity of saxitoxin alone and with vasoconstrictor and local anesthetic agents.
- H J Adams, M R Blair, and B H Takman.
- Arch Int Pharmacodyn Ther. 1976 Dec 1; 224 (2): 275-82.
AbstractSTX (saxitoxin), alone and with various vasoconstrictor and local anesthetic agents, was evaluated for its ability to produce topical anesthesia on the rabbit cornea, peripheral nerve block in the rat, and epidural anesthesia in the dog. High frequency and long duration of block can be attained if sufficiently high concentrations of STX are used, although latency is long and the doses used may produce systemic toxicity. Frequency of satisfactory blocks and mean duration of block can be increased and systemic toxicity reduced if STX is administered with a vasoconstrictor agent. Conventional local anesthetic agents also enhance the nerve blocking activity of STX. When appropriate concentrations of STX, vasoconstrictor and local anesthetic agents are used, systemic toxic effects are not manifested and the blocks produced exhibit the rapid onset and high frequency of block characteristic of the local anesthetic agent and the remarkably long duration of STX.
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