Yоu аre dispаtched tо а residence fоr a 44-year-old woman with a severe headache. You arrive to find the patient lying on her sofa with a wet washcloth on her forehead. She tells you that she has a history of migraine headaches and that this is one of her “typical” headaches. She also complains of nausea and photophobia. Her blood pressure is 170/94 mm Hg, pulse rate is 120 beats/min and regular, and respirations are 22 breaths/min with adequate depth. The most appropriate treatment for this patient includes: