Drug interactions occur when medications are taken together. some interactions are wanted; others are undesirable and even life-threatening. give two reasons for giving medications together, and cite two types of dangerous drug interactions.

Reason for giving medication together

1.)They reduce development of drug resistance since a pathogen or tumor is less likely to have resistance to multiple drugs simultaneously

2.) It has a lower treatment failure rate

Dangerous drug interactions include;

1.)Statins (3-hydroxy-3-methylglutaryl coenzyme A reductase inhibitors) are widely prescribed, and widely recognized to carry a high risk for drug/drug interactions

2.)Coadministration of clarithromycin with vasodilating calcium-channel blockers, such as amlodipine and felodipine, can cause hypotension and acute renal failure.

the answer that best describes the relative refractory period in the neuron is the resting membrane potential is restored, but concentrations of sodium and potassium are not restored to their original state.

the refractory period is the time during which another stimulus given to the neuron will not lead to a second potential. thus, because na+ channels are inactivated during this time, additional depolarizing stimuli do not lead to new action potentials.  

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