ANTICOAGULANTS, ORAL |
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ANTICOAGULANTS, ORAL
BRAND & GENERIC NAMES
ANISINDIONEAnthrombin-K
Coumadin
Danilone
DICUMAROL
Dufalone
Hedulin
Liquamar
Marcumar
Marevan
Melitoxin
Miradon
Panwarfin
PHENINDIONE
PHENPROCOUMON
Sofarin
WARFARIN POTASSIUM
WARFARIN SODIUM
Warfilone
Warnerin
BASIC INFORMATION
Habit forming? No
Prescription needed? Yes
Available as generic? Yes
Drug class: Anticoagulant
USES
Reduces blood clots. Used for abnormal clotting inside blood
vessels.
DOSAGE & USAGE INFORMATION
How to take:
Tablet -- Swallow with liquid. If you can't swallow whole, crumble
tablet and take with liquid or food.
When to take:
At the same time each day.
If you forget a dose:
Take as soon as you remember up to 12 hours late. If more than
12 hours, wait for next scheduled dose (don't double this dose).
Inform your doctor of any missed doses.
What drug does:
Blocks action of vitamin K necessary for blood clotting.
Time lapse before drug works:
36 to 48 hours.
Don't take with:
Any other medicines, even over-the-counter drugs such as cough
and cold medicines, nose drops, diet pills, laxatives or
caffeine, without consulting your doctor.
OVERDOSE
SYMPTOMS:
Bloody vomit and bloody or black stools, red urine.
WHAT TO DO:
Dial 0 (operator) or 911 (emergency) for an ambulance or
medical help. Then give first aid immediately.
See EMERGENCY INFORMATION.
POSSIBLE ADVERSE REACTIONS OR SIDE EFFECTS
SYMPTOMS WHAT TO DO
Life-threatening:
None expected.
Common:
Bloating, gas. Continue. Tell doctor at next
visit.
Infrequent:
Black stools or Discontinue. Seek
bloody vomit, emergency treatment.
coughing up blood.
Rash, hives, itch, Discontinue. Call
blurred vision, doctor right away.
sore throat, easy
bruising, bleeding,
cloudy or red urine,
back pain, jaundice,
fever, chills, fatigue,
weakness.
Diarrhea, cramps, Continue. Call doctor
nausea, vomiting, when convenient.
swollen feet or legs,
hair loss.
Rare:
Necrosis of skin Discontinue. Seek emergency
treatment
Dizziness, headache, Discontinue. Call
mouth sores. doctor right away.
WARNINGS & PRECAUTIONS
Don't take if:
You have been allergic to any oral anticoagulant.
You have a bleeding disorder.
You have an active peptic ulcer.
You have ulcerative colitis.
Before you start, consult your doctor:
If you take any other drugs, including non-prescription drugs.
If you have high blood pressure.
If you have heavy or prolonged menstrual periods.
If you have diabetes.
If you have a bladder catheter.
If you have serious liver or kidney disease.
If you will have surgery within 2 months, including dental
surgery, requiring general or spinal anesthesia.
Pregnancy:
Risk to unborn child outweighs drug benefits. Don't use.
Infants & children:
Use only under doctor's supervision.
Prolonged use:
No age-related problems expected.
Skin & sunlight:
No age-related problems expected.
Driving or hazardous activities:
Avoid hazardous activities that could cause injury.
Don't drive if you feel dizzy or have blurred vision.
Discontinuing:
Don't discontinue without consulting doctor. Dose may require
gradual reduction if you have taken drug for a long time. Doses
of other drugs may also require adjustment.
Others:
Carry identification to state you take anticoagulants.
POSSIBLE INTERACTION WITH OTHER DRUGS
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Acetaminophen |
Increased effect of anticoagulant. |
Allopurinol |
Increased effect of anticoagulant. |
Amiodarone |
Increased effect of anticoagulant. |
Androgens |
Increased effect of anticoagulant. |
Antacids |
Decreased effect of |
(large doses, |
anticoagulant. |
see Drugs Glossary) |
Antibiotics |
Increased effect of |
(see Drugs Glossary) |
anticoagulant. |
Anticonvulsants |
Increased effect of |
(hydantoin, see |
both drugs. |
Drugs Glossary) |
Antidepressants, |
Increased effect of |
tricyclic (TCA, |
anticoagulant. |
see Drugs Glossary) |
Antidiabetics |
Increased effect of |
(oral, see Drugs |
anticoagulant. |
Glossary) |
Antihistamines |
Unpredictable increased |
(see Drugs Glossary) |
or decreased effect of |
|
anticoagulant. |
Aspirin |
Possible spontaneous bleeding. |
Barbiturates |
Decreased effect of |
(see Drugs Glossary) |
anticoagulant. |
Benzodiazepines |
Unpredictable increased |
(see Drugs Glossary) |
or decreased anticoagulant effect. |
Calcium supplements |
Decreased anticoagulant effect. |
Carbamazepine |
Decreased effect of anticoagulant. |
Fluoxetine |
May cause confusion, agitation, |
|
convulsions and high blood |
|
pressure. Avoid combining. |
Griseofulvin |
Decreased effect of anticoagulant. |
Non-steroidal |
Increased risk of |
anti-inflammatory |
bleeding. |
drugs (NSAIDs, see |
Drugs Glossary) |
Phenytoin |
Decreased phenytoin levels. |
Rifampin |
Decreased effect of anticoagulant. |
Suprofen |
Increased risk of bleeding. |
Vitamin K |
Decreased effect of anticoagulant. |
POSSIBLE INTERACTION WITH OTHER SUBSTANCES
Marijuana: |
None expected. |
Tobacco: |
None expected. |
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