Remember that your doctor has prescribed this medication because he or she has judged that the benefit to you is greater than the risk of side effects. Lopressor is beta blocker which relaxes the blood vessels and assists the circulation of blood. Consult your pharmacist or local waste disposal company for more details about how to safely discard your product. Appropriate therapy with fluids, positive inotropic buy cheap lopressor with dr. prescription agents, balloon counterpulsation, or other treatment modalities should be instituted. PRECAUTIONS: Before taking metoprolol, tell your doctor or pharmacist if you are allergic to or to other beta-blockers. Pregnancy Category Lopressor has been shown to increase postimplantation loss and decrease neonatal survival in rats at doses up to 55.