Zocor is the brand name of simvastatin, a prescription drug used to lower blood cholesterol. Zocor belongs to a class of drugs known as statins, also called HMG-CoA reductase inhibitors. Learn about the potential side effects of Questran (cholestyramine). Includes common and rare side effects information for consumers and healthcare professionals. Questions about dosage and length of treatment with Plavix (clopidogrel), Effient (prasugrel), and aspirin after having a stent? Have you experienced allergic reactions or side-effects? Join the conversation. SIDE EFFECTS Clinical Trials Experience. Because clinical studies are conducted under widely varying conditions, adverse reaction rates observed in the clinical studies of a drug cannot be directly compared to rates in the clinical studies of another drug and may not reflect the rates observed in practice. Many health professionals are convinced that statin-type cholesterol-lowering drugs do not cause any side effects. These physicians published a review that stated that very idea (European Journal of Preventive Cardiology, April, 2014): Find a comprehensive guide to possible side effects including common and rare side effects when taking Vytorin (Ezetimibe and Simvastatin) for healthcare professionals and consumers. Hypercholesterolemia is the health issue of the 21st century. It is actually an invented disease, a “problem” that emerged when health professionals learned how to measure cholesterol levels in the blood. Promethazine is a first-generation antihistamine. It is used to treat allergies, trouble sleeping, and nausea. It may help with some symptoms associated with the common cold. It may also be used for sedating people who are agitated or anxious. Along with its needed effects, cholestyramine may cause some unwanted effects. Although not all of these side effects may occur, if they do occur they may need medical attention. Pain Research Institute Leading the World in Drug-Free Pain Treatments that Do No Harm .