Arotinolol (INN, marketed under the tradename Almarl) is a medication in the class of mixed alpha/beta blockers. It also acts as a β3 receptor agonist. A 1979 publication suggests arotinolol as having first been described in the scientific literature by Sumitomo Chemical as 'β-adrenergic blocking, antiarrhythmic compound S-596'. Arotinolol (INN, marketed under the tradename Almarl) is a medication in the class of mixed alpha/beta blockers. It also acts as a β3 receptor agonist. A 1979 publication suggests arotinolol as having first been described in the scientific literature by Sumitomo Chemical as 'β-adrenergic blocking, antiarrhythmic compound S-596'. It is used in the treatment of high blood pressure and essential tremor. Recommended dosage is 10–30 mg per day.