Contraindicated in: 
- Hypersensitivity; 
 - Hypersensitivity to bromides; 
 
Use Cautiously in: 
- Dehydration or electrolyte abnormalities (should be corrected); 
 - Fractures or muscle spasm; 
 - Hyperthermia (↑ duration/intensity of paralysis); 
 - Significant hepatic impairment; 
 - Shock; 
 - Extensive burns (may be more resistant to effects); 
 - Low plasma pseudocholinesterase levels (may be seen in association with anemia, dehydration, cholinesterase inhibitors/insecticides, severe liver disease, pregnancy, or hereditary predisposition); 
 - Obese patients ; 
 - OB: Safety not established (use only if benefit outweighs potential risk to fetus)
 - Pedi: Children <7 wk (safety and effectiveness not established)
 
Exercise Extreme Caution in: 
- Neuromuscular diseases such as myasthenia gravis (small test dose may be used to assess response).
 
 
Therapeutic Classification: neuromuscular blocking agents-nondepolarizing
 
Absorption: Following IV administration, absorption is essentially complete.
Distribution: Rapidly distributes in extracellular fluid; minimal penetration of the CNS.
Metabolism/Excretion: Some metabolism by the liver (20%), with conversion to at least one active metabolite; 35% excreted unchanged by the kidneys
Half-Life: Infants: 65 min; Children: 41 min; Adults: 6575 min (↓ near term in pregnant patients, ↑ in hepatic impairment).