The Home Health Nurse Notes That the Elderly Patient Doubled

The home health nurse notes that the elderly patient doubled up on his pain medication, even though the prescribed dose was at a therapeutic level. The patient says, "If one pill is good, two pills are better." Which statement best describes the result of the patient's action?

A) The patient develops tolerance and does not experience any difference.
B) The patient experiences more pain relief from the additional dose.
C) The patient develops tolerance and will need increased doses of the drug.
D) The patient is more likely to exhibit side effects from the additional dose.