Dose-related increases in heart rate & BP, ectopic beats, angina or chest pain, palpitations. Anxiety, fear, restlessness, insomnia, confusion, irritability & psychotic states, dyspnea, hyperglycemia, palpitations, tachycardia (sometimes w/ anginal pain), tremors, sweating, hypersalivation, weakness, dizziness, headache & coldness of extremities. Anorexia, nausea, vomiting.