Review Question - QID 109552

A 35-year-old woman presents to the emergency department with a new-onset seizure. The patient was at a rave when her symptoms began. The patient fell to the ground, hit her head, and began convulsing. Her friends promptly called emergency medical services and brought her to the emergency department. The patient begins to seize again; however, the episode ends in less than 60 seconds. Her temperature is 99.5°F (37.5°C), blood pressure is 139/65 mmHg, pulse is 100/min, respirations are 18/min, and oxygen saturation is 98% on room air. A physical exam reveals a fatigued patient with focal weakness. A CT of the brain is performed as seen in Figure A. Laboratory values are ordered and shown below:

Hemoglobin: 12 g/dL
Hematocrit: 36%
Leukocyte count: 8,500 cells/mm^3 with normal differential
Platelet count: 207,000/mm^3

Serum:
Na+: 140 mEq/L
Cl-: 102 mEq/L
K+: 4.0 mEq/L
HCO3-: 24 mEq/L
BUN: 21 mg/dL
Glucose: 89 mg/dL
Creatinine: 1.2 mg/dL
Ca2+: 10.0 mg/dL
AST: 22 U/L
ALT: 19 U/L

Urine:
Color: amber
Nitrites: negative
Na+: 12 mmol/24 hours
Red blood cells: 0/hpf
Alcohol: positive
Amphetamines: positive
Barbiturates: negative
Benzodiazepines: positive
Cocaine: positive
Codeine: negative
Heroin: positive
Hydromorphone: negative
Methadone: negative
Morphine: negative
Phencyclidine (PCP): positive
Tetrahydrocannabinol (THC): positive
3,4-methylenedioxymethamphetamine (MDMA): positive

Which of the following is the most appropriate long-term management of this patient's presenting condition?