Prohibited drugs for unstable angina include ephedrine, ergotamine tartrate and digitalis. 1. Ephedrine: Ephedrine is an adrenomimetic drug, which can lead to cardiac hyperfunction, increase myocardial oxygen consumption and exacerbate myocardial ischemia, resulting in more severe angina symptoms. Therefore, ephedrine is prohibited in patients with unstable angina pectoris. 2. ergotamine tartrate: ergotamine tartrate can cause peripheral vasoconstriction, elevated blood pressure, increased cardiac afterload, resulting in increased cardiac burden, causing myocardial ischemia, and aggravate the condition of patients with angina pectoris, therefore, unstable angina pectoris is prohibited ergotamine tartrate. 3. digitalis: digitalis belongs to the positive inotropic drugs, can make the heart contraction ability to enhance, increase myocardial oxygen consumption, aggravate myocardial ischemia, so unstable angina pectoris prohibited digitalis. Unstable angina patients should go to the hospital in time, under the guidance of the doctor to take medication, avoid self-medication, so as not to cause serious adverse consequences.