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Treatment with terazosin should be introduced cautiously because of the risk of sudden collapse following the initial dose. Special caution is necessary to patients with renal or hepatic impairment and in the elderly. Terazosin should be used with caution in patients with angina pectoris. It may cause drowsiness or dizziness; patients so affected should not drive or operate machinery.
Terazosin is not recommended for the treatment of heart failure caused by mechanical obstruction, for example aortic/mitral valve stenosis, pulmonary embolism and restrictive pericardial disease.
