Before taking cilostazol, tell your doctor or pharmacist if you are allergic to it; or if you have any other allergies. This product may contain inactive ingredients, which can cause allergic reactions or other problems. Talk to your pharmacist for more details.

Before using this medication, tell your doctor or pharmacist your medical history, especially of: bleeding disorders (such as bleeding ulcers, bleeding in the eye/brain), congestive heart failure, other heart disease (such as heart attack, chest pain, fast/irregular heartbeat), stroke, kidney disease, liver disease, blood disorders (such as hemophilia, low platelet counts).

This drug may make you dizzy. Do not drive, use machinery, or do any activity that requires alertness until you are sure you can perform such activities safely. Limit alcoholic beverages.

Before having surgery, tell your doctor or dentist about all the products you use (including prescription drugs, nonprescription drugs, and herbal products).

Do not take cilostazol if you have congestive heart failure. Cilostazol can make this condition worse.


FDA pregnancy category C. This medication may be harmful to an unborn baby. Tell your doctor if you are pregnant or plan to become pregnant during treatment. Cilostazol can pass into breast milk and may harm a nursing baby. Do not use this medication without telling your doctor if you are breast-feeding a baby.

Possible side effects:

Headache, diarrhea, runny nose, and dizziness may occur. If any of these effects persist or worsen, tell your doctor or pharmacist promptly. 

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. Many people using this medication do not have serious side effects.

Tell your doctor immediately if any of these serious side effects occur: fast/pounding/irregular heartbeat, swelling of the hands/feet.

Tell your doctor immediately if any of these unlikely but serious side effects occur: easy bruising/bleeding, black or bloody stools, vomit that looks like coffee grounds, signs of infection (such as fever, persistent sore throat).

Get medical help right away if any of these rare but serious side effects occur: chest/jaw/left arm pain, fainting, vision changes, weakness on one side of the body, slurred speech, confusion.

A very serious allergic reaction to this drug is rare. However, get medical help right away if you notice any symptoms of a serious allergic reaction, including: rash, itching/swelling (especially of the face/tongue/throat), severe dizziness, trouble breathing.

This is not a complete list of possible side effects. If you notice other effects not listed above, contact your doctor or pharmacist.