Apatient is having surgery to repair a ruptured achilles tendon. the patient develops severe muscle contractions and hyperthermia. which medications will be administered?

Severe widespread muscular contractions, along with malignant hyperthermia, needs to be treated immediately with IV Dantrolene (Dantrium or Ryanodex).
Dantrolene works as a post-synaptic muscle relaxant by blocking receptors for ryanodine, thereby being called a "Ryanodine Receptor Antagonist" (RRA).

It is very important to stay hydrated. your body needs it for may things for cells, tissues, your organs and etc. water also with your temperature that way you don’t get a headache etc. i bet if you look it up there will be a lot of things you can learn.