Atenolol is a selective beta-1 adrenergic blocker used primarily to treat hypertension and angina pectoris (chest pain). It works by blocking beta-1 receptors in the heart, which helps to reduce heart rate, lower blood pressure, and decrease the heart's workload. Atenolol is typically administered orally in tablet form. It is also used in the management of certain types of arrhythmias and to reduce the risk of heart attacks. Common side effects include fatigue, dizziness, and cold extremities. Atenolol should be used with caution in patients with asthma or certain other conditions.

Metipranolol is a non-selective beta-blocker primarily used in ophthalmology to treat elevated intraocular pressure in conditions like open-angle glaucoma and ocular hypertension. It works by reducing the production of aqueous humor in the eye, thereby lowering intraocular pressure. Metipranolol is typically administered as eye drops. Common side effects can include ocular irritation, dry eyes, and potential systemic effects like fatigue or dizziness. It should be used under medical supervision, especially in individuals with cardiovascular or respiratory conditions.

Propranolol is a non-selective beta-blocker used to treat a variety of conditions, including hypertension, angina, certain types of tremors, and anxiety. It works by blocking beta-adrenergic receptors, which helps to lower blood pressure, reduce heart rate, and decrease the workload on the heart. Propranolol is also used in the management of migraine prophylaxis and in some cases of arrhythmias. It is typically administered orally in tablet form but can also be given intravenously. Common side effects include fatigue, dizziness, and gastrointestinal disturbances. It should be used cautiously in patients with respiratory conditions or certain heart conditions.

Methysergide is a medication used for the prevention of migraine and cluster headaches. It is an ergot derivative that works as a serotonin receptor antagonist, helping to reduce the frequency and severity of headache attacks. Methysergide is typically administered orally in tablet form and is often used as a long-term preventive treatment. Common side effects can include gastrointestinal issues, dizziness, or fatigue, and it is important to use it under medical supervision due to potential risks, including fibrosis or vascular complications with prolonged use.

Dihydroergotamine is a medication used primarily to treat acute migraine attacks and cluster headaches. It is an ergot alkaloid that works by constricting blood vessels in the brain and reducing inflammation, which helps alleviate headache symptoms. Dihydroergotamine is usually administered via nasal spray or injection. It is effective in managing severe headache episodes but can cause side effects such as nausea, dizziness, or muscle cramps. It should be used according to medical guidance to minimize potential complications.

Prazosin is an alpha-1 adrenergic blocker used primarily to treat high blood pressure (hypertension) and symptoms of benign prostatic hyperplasia (BPH). It works by relaxing the smooth muscles in blood vessels, leading to vasodilation and reduced blood pressure. In cases of BPH, Prazosin helps to relieve urinary symptoms by relaxing the muscles in the bladder neck and prostate. It is usually administered orally and can cause side effects such as dizziness, orthostatic hypotension, or headaches.

Phenoxybenzamine is a non-selective, irreversible alpha-adrenergic antagonist used primarily to manage symptoms of pheochromocytoma, a tumor of the adrenal gland that causes excessive production of catecholamines, leading to high blood pressure. By permanently blocking alpha-adrenergic receptors, Phenoxybenzamine helps to reduce blood pressure and alleviate related symptoms. It is typically administered orally and requires careful monitoring for side effects such as orthostatic hypotension, tachycardia, or dizziness.

Phenotolamine is a non-selective alpha-adrenergic antagonist used to manage conditions like pheochromocytoma (a type of tumor that causes high blood pressure) and to treat severe hypertension during surgical procedures. It works by blocking alpha-adrenergic receptors, which helps to lower blood pressure and improve blood flow. Phenotolamine is typically administered intravenously and requires close monitoring to manage potential side effects, such as tachycardia or orthostatic hypotension.

Tolazoline is a medication used as a vasodilator to manage conditions such as pulmonary hypertension and peripheral vascular disorders. It works by relaxing the smooth muscles in blood vessels, leading to vasodilation and improved blood flow. Tolazoline is often administered intravenously in a hospital setting and is utilized to help reduce elevated blood pressure in the lungs and improve circulation. Its use requires careful monitoring to manage potential side effects like hypotension or fluid retention.

Metarminol is a medication primarily used as a vasopressor to raise blood pressure in acute situations such as hypotensive states or shock. It works by stimulating alpha-adrenergic receptors, leading to vasoconstriction and an increase in blood pressure. Metarminol is typically administered intravenously in hospital settings and is used to manage severe low blood pressure when other treatments are not effective. Its use is carefully monitored to avoid potential side effects, including excessive hypertension or arrhythmias.