Description and Brand Names

Drug information provided by: Micromedex

US Brand Name

  1. Pletal


Cilostazol improves the flow of blood through blood vessels. It is used to reduce leg pain caused by poor circulation (intermittent claudication). Cilostazol makes it possible to walk farther before having to rest because of leg pain. This medicine works by keeping blood from clotting and by dilating or relaxing the blood vessels.

This medicine is available only with your doctor's prescription.

This product is available in the following dosage forms:

  • Tablet

Before Using

In deciding to use a medicine, the risks of taking the medicine must be weighed against the good it will do. This is a decision you and your doctor will make. For this medicine, the following should be considered:


Tell your doctor if you have ever had any unusual or allergic reaction to this medicine or any other medicines. Also tell your health care professional if you have any other types of allergies, such as to foods, dyes, preservatives, or animals. For non-prescription products, read the label or package ingredients carefully.


Appropriate studies have not been performed on the relationship of age to the effects of cilostazol in the pediatric population. Safety and efficacy have not been established.


Appropriate studies performed to date have not demonstrated geriatric-specific problems that would limit the usefulness of cilostazol in the elderly.


Information about this cilostazol-oral-route
Pregnancy Category Explanation
All Trimesters C Animal studies have shown an adverse effect and there are no adequate studies in pregnant women OR no animal studies have been conducted and there are no adequate studies in pregnant women.


There are no adequate studies in women for determining infant risk when using this medication during breastfeeding. Weigh the potential benefits against the potential risks before taking this medication while breastfeeding.

Drug Interactions

Although certain medicines should not be used together at all, in other cases two different medicines may be used together even if an interaction might occur. In these cases, your doctor may want to change the dose, or other precautions may be necessary. When you are taking this medicine, it is especially important that your healthcare professional know if you are taking any of the medicines listed below. The following interactions have been selected on the basis of their potential significance and are not necessarily all-inclusive.

Using this medicine with any of the following medicines is not recommended. Your doctor may decide not to treat you with this medication or change some of the other medicines you take.

  • Riociguat

Using this medicine with any of the following medicines is usually not recommended, but may be required in some cases. If both medicines are prescribed together, your doctor may change the dose or how often you use one or both of the medicines.

  • Abciximab
  • Abiraterone
  • Aceclofenac
  • Acemetacin
  • Alipogene Tiparvovec
  • Alteplase, Recombinant
  • Amiodarone
  • Amtolmetin Guacil
  • Anagrelide
  • Aprepitant
  • Aspirin
  • Atazanavir
  • Bitter Orange
  • Boceprevir
  • Bromfenac
  • Bufexamac
  • Carbamazepine
  • Celecoxib
  • Ceritinib
  • Choline Salicylate
  • Ciprofloxacin
  • Citalopram
  • Clarithromycin
  • Clonixin
  • Clopidogrel
  • Cobicistat
  • Conivaptan
  • Crizotinib
  • Dabrafenib
  • Delavirdine
  • Desvenlafaxine
  • Dexibuprofen
  • Dexketoprofen
  • Diclofenac
  • Diflunisal
  • Diltiazem
  • Dipyridamole
  • Dipyrone
  • Dronedarone
  • Droxicam
  • Duloxetine
  • Eptifibatide
  • Erythromycin
  • Escitalopram
  • Eslicarbazepine Acetate
  • Esomeprazole
  • Etodolac
  • Etofenamate
  • Etoricoxib
  • Etravirine
  • Felbinac
  • Fenoprofen
  • Fepradinol
  • Feprazone
  • Floctafenine
  • Fluconazole
  • Flufenamic Acid
  • Fluoxetine
  • Flurbiprofen
  • Fluvoxamine
  • Fosaprepitant
  • Ginkgo
  • Ibuprofen
  • Ibuprofen Lysine
  • Idelalisib
  • Imatinib
  • Indinavir
  • Indomethacin
  • Itraconazole
  • Ketoconazole
  • Ketoprofen
  • Ketorolac
  • Lansoprazole
  • Letrozole
  • Levomilnacipran
  • Lopinavir
  • Lornoxicam
  • Loxoprofen
  • Lumiracoxib
  • Meclofenamate
  • Mefenamic Acid
  • Meloxicam
  • Miconazole
  • Mifepristone
  • Milnacipran
  • Mitotane
  • Moclobemide
  • Morniflumate
  • Nabumetone
  • Naproxen
  • Nefazodone
  • Nelfinavir
  • Nepafenac
  • Netupitant
  • Niflumic Acid
  • Nilotinib
  • Nimesulide
  • Omeprazole
  • Oxaprozin
  • Oxcarbazepine
  • Oxyphenbutazone
  • Pantoprazole
  • Parecoxib
  • Paroxetine
  • Phenylbutazone
  • Piketoprofen
  • Piperaquine
  • Piroxicam
  • Posaconazole
  • Prasugrel
  • Primidone
  • Proglumetacin
  • Propionic Acid
  • Propyphenazone
  • Proquazone
  • Rabeprazole
  • Regorafenib
  • Ritonavir
  • Rivaroxaban
  • Rofecoxib
  • Salicylic Acid
  • Salsalate
  • Saquinavir
  • Siltuximab
  • Sodium Salicylate
  • Sulfinpyrazone
  • Sulindac
  • Telaprevir
  • Telithromycin
  • Tenoxicam
  • Tiaprofenic Acid
  • Ticagrelor
  • Ticlopidine
  • Tipranavir
  • Tirofiban
  • Tolfenamic Acid
  • Tolmetin
  • Valdecoxib
  • Venlafaxine
  • Verapamil
  • Vilazodone
  • Voriconazole
  • Vortioxetine

Other Interactions

Certain medicines should not be used at or around the time of eating food or eating certain types of food since interactions may occur. Using alcohol or tobacco with certain medicines may also cause interactions to occur. The following interactions have been selected on the basis of their potential significance and are not necessarily all-inclusive.

Using this medicine with any of the following may cause an increased risk of certain side effects but may be unavoidable in some cases. If used together, your doctor may change the dose or how often you use this medicine, or give you special instructions about the use of food, alcohol, or tobacco.

  • Grapefruit Juice

Other Medical Problems

The presence of other medical problems may affect the use of this medicine. Make sure you tell your doctor if you have any other medical problems, especially:

  • Active bleeding (including peptic ulcers, bleeding in the brain) or
  • Blood clotting problems or
  • Congestive heart failure—Should not be used in patients with these conditions.
  • Heart rhythm problems (eg, tachycardia) or
  • Ischemic heart disease, history of or
  • Kidney disease or
  • Leukopenia (low white blood cells) or
  • Liver disease or
  • Thrombocytopenia (low number of platelets)—Use with caution. May make these conditions worse.

Proper Use

Take this medicine exactly as directed by your doctor. Do not take more of it, do not take it more often, and do not take it for a longer time than your doctor ordered.

This medicine should come with a patient information leaflet. Read and follow these instructions carefully. Ask your doctor if you have any questions.

To help you remember to take your medicine, try to get into the habit of taking it at the same time each day.

Do not eat grapefruit or drink grapefruit juice while you are using this medicine.


The dose of this medicine will be different for different patients. Follow your doctor's orders or the directions on the label. The following information includes only the average doses of this medicine. If your dose is different, do not change it unless your doctor tells you to do so.

The amount of medicine that you take depends on the strength of the medicine. Also, the number of doses you take each day, the time allowed between doses, and the length of time you take the medicine depend on the medical problem for which you are using the medicine.

  • For oral dosage form (tablets):
    • For treatment of peripheral vascular disease (circulation problems):
      • Adults—100 milligrams (mg) two times a day, taken at least one half hour before or 2 hours after breakfast and dinner. In patients who take certain other medicines at the same time as cilostazol, the dose may be 50 mg two times a day.
      • Children—Use and dose must be determined by a doctor.

Missed Dose

If you miss a dose of this medicine, take it as soon as possible. However, if it is almost time for your next dose, skip the missed dose and go back to your regular dosing schedule. Do not double doses.


Store the medicine in a closed container at room temperature, away from heat, moisture, and direct light. Keep from freezing.

Keep out of the reach of children.

Do not keep outdated medicine or medicine no longer needed.

Ask your healthcare professional how you should dispose of any medicine you do not use.


It may take several weeks for this medicine to work. If you feel that this medicine is not working, do not stop taking it on your own. Instead, check with your doctor. Blood tests may be needed to check for unwanted effects.

Cilostazol can temporarily lower the number of white blood cells in your blood, increasing the chance of getting an infection. It can also lower the number of platelets, which are necessary for proper blood clotting. If this occurs, there are certain precautions you can take, especially when your blood count is low, to reduce the risk of infection or bleeding:

  • If you can, avoid people with infections. Check with your doctor immediately if you think you are getting an infection or if you get a fever or chills, cough or hoarseness, lower back or side pain, or painful or difficult urination.
  • Check with your doctor immediately if you notice any unusual bleeding or bruising, black, tarry stools, blood in the urine or stools, or pinpoint red spots on your skin.
  • Be careful when using a regular toothbrush, dental floss, or toothpick. Your medical doctor, dentist, or nurse may recommend other ways to clean your teeth and gums. Check with your medical doctor before having any dental work done.
  • Do not touch your eyes or the inside of your nose unless you have just washed your hands and have not touched anything else in the meantime.
  • Be careful not to cut yourself when you are using sharp objects such as a safety razor or fingernail or toenail cutters.
  • Avoid contact sports or other situations where bruising or injury could occur.

Dizziness, lightheadedness, or even fainting may occur when you get up suddenly from a lying or sitting position. Getting up slowly may help lessen this problem. Also, lying down for a while may relieve dizziness or lightheadedness.

Smoking tobacco products, such as cigarettes, may worsen your condition since nicotine may further narrow blood vessels and may also affect how this medicine works. Therefore, it is best to avoid smoking.

Do not take other medicines unless they have been discussed with your doctor. This includes prescription or nonprescription (over-the-counter [OTC]) medicines and herbal or vitamin supplements.

Side Effects

Along with its needed effects, a medicine may cause some unwanted effects. Although not all of these side effects may occur, if they do occur they may need medical attention.

Check with your doctor immediately if any of the following side effects occur:

More common

  1. Fast or irregular heartbeat
  2. fever

Less common

  1. Abnormal bleeding
  2. bloody or black tarry stools
  3. bruises or red spots on the skin
  4. fainting
  5. nausea, heartburn, or indigestion (severe or continuing)
  6. nosebleeds
  7. stiff neck
  8. stomach pain, cramping, or burning (severe)
  9. swelling of the tongue
  10. vomiting of blood or material that looks like coffee grounds

Incidence not known

  1. Abdominal or stomach pain
  2. area rash
  3. bleeding gums
  4. bleeding tendency
  5. blistering, peeling, loosening of the skin
  6. blood in the urine or stools
  7. blurred vision
  8. chest pain
  9. chills
  10. clay-colored stools
  11. confusion
  12. cough or hoarseness
  13. coughing up blood
  14. dark urine
  15. diarrhea
  16. difficulty with breathing
  17. drowsiness
  18. fever with or without chills
  19. general feeling of tiredness or weakness
  20. headache, sudden and severe
  21. inability to speak
  22. itching of the eyes
  23. itching of the skin
  24. joint or muscle pain
  25. light-colored stools
  26. loss of appetite
  27. loss of consciousness
  28. lower back or side pain
  29. nausea and vomiting
  30. painful or difficult urination
  31. pinpoint red spots on the skin
  32. red skin lesions, often with a purple center
  33. red, irritated eyes
  34. seizures
  35. skin rash
  36. slurred speech
  37. sores, ulcers, or white spots on the lips or in the mouth
  38. stomach pain
  39. swollen glands
  40. temporary blindness
  41. unpleasant breath odor
  42. unusual bleeding or bruising
  43. unusual tiredness or weakness
  44. weakness in the arm or leg on one side of the body, sudden and severe
  45. weakness of part of the body
  46. yellow eyes or skin

Get emergency help immediately if any of the following symptoms of overdose occur:

Symptoms of overdose

  1. Diarrhea
  2. dizziness or lightheadedness when getting up from a lying or sitting position
  3. fast or irregular heartbeat
  4. headache (severe)

Some side effects may occur that usually do not need medical attention. These side effects may go away during treatment as your body adjusts to the medicine. Also, your health care professional may be able to tell you about ways to prevent or reduce some of these side effects. Check with your health care professional if any of the following side effects continue or are bothersome or if you have any questions about them:

More common

  1. Back pain
  2. dizziness
  3. gas
  4. headache
  5. increased cough
  6. pain or stiffness in the muscles
  7. pounding heartbeat
  8. runny or stuffy nose
  9. sore throat
  10. swelling of the arms or legs

Less common

  1. Bone pain
  2. burning feeling in the throat or chest
  3. difficulty with swallowing
  4. hives
  5. pain or stiffness in the joints
  6. ringing or buzzing in the ears
  7. swelling of the face, fingers, or lower legs

Incidence not known

  1. Bruising
  2. hot flushes
  3. pain

Other side effects not listed may also occur in some patients. If you notice any other effects, check with your healthcare professional.

Call your doctor for medical advice about side effects. You may report side effects to the FDA at 1-800-FDA-1088.