Final answer:
A patient with a tumor of the adrenal medulla exhibiting hypertension, headache, vomiting, and tachycardia likely has pheochromocytoma, treated with beta blockers like Propranolol.
Step-by-step explanation:
The patient's symptoms of hypertension, headache, vomiting, and tachycardia, along with a tumor of the adrenal medulla, suggest a diagnosis of pheochromocytoma. This condition is characterized by tumors in the adrenal medulla that cause excessive production of catecholamines, leading to these symptoms. Treatment often includes the use of beta blockers such as Propranolol, which are sympatholytic drugs that block the receptors associated with vasoconstriction and cardioacceleration, thus helping in managing hypertension and tachycardia.