A 28 y/o M is brought to the Emergency Department by police. He is agitated, shouting, and diaphoretic. He is being held down by 3 security guards to have vitals taken. His HR is 175 and BP is 185/98. ECG shows sinus tachycardia. The patient has a friend with him who tells you that he used cocaine today. What is the BEST choice to treat his agitation and tachycardia?