HomeDrug ClassesBlood Viscosity Reducers

Blood Viscosity Reducers: Uses, Common Brands, and Safety Info

Blood viscosity reducers are drugs that reduce the thickness of blood, improving blood flow. Common conditions treated with these medications include peripheral vascular disease, cardiovascular disease, and certain blood disorders. Common brands include aspirin, ticlopidine, and clopidogrel. It is important to follow prescribed dosages and be aware of potential side effects and drug interactions.

Blood Viscosity Reducers

Blood viscosity reducers, also known as rheological agents or hemodilution agents, are a class of drugs that help decrease the thickness or stickiness of blood. This results in improved blood flow throughout the body, allowing oxygen and nutrients to be delivered more efficiently to the organs and tissues. These medications are primarily used for conditions associated with increased blood viscosity, such as peripheral vascular disease, cardiovascular disease, and certain blood disorders.


Blood viscosity reducers are commonly used in the management of various health conditions. They help reduce the risk of blood clots by preventing the blood from becoming too thick or sticky. These drugs are often prescribed for patients with peripheral vascular disease, a condition characterized by narrowing or blockage of the blood vessels that supply the legs and feet. By improving blood flow to the extremities, blood viscosity reducers can help relieve symptoms such as pain, numbness, and cramping.

In addition, these medications are beneficial in the treatment of cardiovascular disease, including conditions like angina (chest pain) and myocardial infarction (heart attack). By reducing blood viscosity, they enhance the delivery of oxygen and nutrients to the heart muscles, promoting improved cardiac function. Blood viscosity reducers may also be prescribed for individuals with certain blood disorders, such as polycythemia, where an excess of red blood cells causes blood to be more viscous than normal.

Common Brands

Several different drugs fall under the category of blood viscosity reducers, each with its own specific mechanism of action. Some commonly prescribed brands include:

  • Aspirin: Though primarily known as a pain reliever, aspirin is also an effective blood viscosity reducer. It prevents the aggregation of platelets, reducing the risk of blood clots formation.

  • Ticlopidine: This medication inhibits platelet function, thereby reducing blood viscosity and preventing clot formation. It is commonly prescribed for patients unable to tolerate aspirin.

  • Clopidogrel: Similar to ticlopidine, clopidogrel is an antiplatelet drug that helps lower blood viscosity and prevent clotting. It is often used in individuals at high risk of cardiovascular events.


When taking blood viscosity reducers, it is important to follow the prescribed dosage and duration as specified by the healthcare provider. As with any medication, these drugs can have potential side effects. Common side effects may include upset stomach, indigestion, and increased bleeding tendencies. It is essential to report any severe side effects or allergic reactions to the prescribing doctor immediately.

Prior to starting any new medication, individuals should inform their healthcare provider about their medical history, including any bleeding disorders or previous gastrointestinal ulcers. Blood viscosity reducers may interact with other medications, such as anticoagulants or nonsteroidal anti-inflammatory drugs (NSAIDs), so it is crucial to communicate all current medications to the healthcare provider.

In conclusion, blood viscosity reducers are a class of drugs that help decrease the thickness of blood, improving blood flow throughout the body. They are commonly used in the treatment of peripheral vascular disease, cardiovascular disease, and certain blood disorders. Aspirin, ticlopidine, and clopidogrel are some of the commonly prescribed brands within this class. However, it is essential to discuss the safety, potential side effects, and drug interactions with a healthcare professional before starting any new medication.

List of Blood Viscosity Reducers