| Muscle relaxants | Onset ( minutes ) | Duration ( minutes ) |
| | | |
| Succinyl choline | 1-1.5 | 3-6 |
| Mivacurium | 2-4 | 12-20 |
| Rocuronium | 1-2 | 25-40 |
| Vecuronium | 2-4 | 30-60 |
| Atracurium | 2-4 | 20-35 |
| Cisatracurium | 3-6 | 20-40 |
| Piperacuronium | 2-4 | 50-100 |
| d-tubocurarine | 4-6 | 30-60 |
| Pancuronium | 4-6 | 40-80 |
| Doxacurium | 4-8 | 60-120 |
So if the question is ?
Q: what is the shortest acting muscle relaxant ?
Answer : succinyl choline .
Q: what is the shortest acting non-depolarising muscle relaxant ?
Answer: mivacurium
Q: what is the longest acting muscle relaxant ?
Answer: doxacurium .
Q: what is the longest acting non-depolarising muscle relaxant ?
Answer: doxacurium .
TRY USING THIS MNEMONIC TO REMEMBER : Suck Me Rosy Victoria's Attractive Sister , Prepare To Please Doctors.
( in PREPARE = Two P s indicate piperacuronium and please indicates pancuronium )
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