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how long does warfarin take to reach maximum effect

A 33-year-old female asked:
Dr. Andrew Kaplan
33 years experience Cardiology
At least a few days: It can take up to 5 or more days for the medication to reach therapeutic effect. Sensitivity to the medication is based on genetic factors, as well as ... Read More
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A 41-year-old female asked:
Dr. David Brouwer
29 years experience Internal Medicine
Warfarin: The duration of time it takes for warfarin to be eliminated from your body depends on a few factors. It depends on the dose that you were previously t ... Read More
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A 45-year-old member asked:
Dr. Douglas Fronzaglia ii, do, ms
20 years experience Geriatrics
Discuss with doctor: There are too many factor to discuss here. You need to discuss this with your doctor.
A member asked:
Dr. Jerry Light
35 years experience Vascular Surgery
Three to five days: In general, the effects of warfarin (coumadin) last for three to five days after stopping the medication.
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A 39-year-old member asked:
Dr. Sewa Legha
49 years experience Medical Oncology
It depends on the st: Depending on the stage of breast cancer, tumors show a response within 6-8 weeks, with a maximum effect seen by 6-9 months. But if the drug is being u ... Read More
A 34-year-old female asked:
Dr. Diane Minich
36 years experience Family Medicine
4-7 days: Using it daily it reaches steady state in 4-7 days.
A 24-year-old female asked:
Dr. Douglas Bey
56 years experience Psychiatry
2-3 weeks: Probably full effect 6 weeks
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A 28-year-old male asked:
Dr. Philip Miller
46 years experience Family Medicine
2-3 hours: the dosing is usually every 4-6hrs or if sustained release, every 12 hours.
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A 52-year-old member asked:
Dr. Liviu Klein
22 years experience Cardiology
4-5 doses: Usually it takes about 4-5 doses to achieve a steady state of most drugs. Full effects on blood pressure for instance may take up to 4 weeks to be see ... Read More
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A 42-year-old member asked:
Dr. Marc Zimmermann
21 years experience Psychiatry
Depends: It should be fully in your system in 72 hours. However, it may take several weeks to have an impact on your depression. If you have questions, conta ... Read More
A 56-year-old member asked:
Dr. Andrew Murphy
28 years experience Allergy and Immunology
Pretty Quickly: Allegra (fexofenadine) and most otc antihistamines has its effect within the first 30 -60 minutes.
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A 52-year-old member asked:
Dr. Jonathan Dissin
38 years experience Neurology
Depends: To reach a steady state level you must wait for a least 5 half-lives of the drug (9->16 hours). If the level is subtherapeutic, the dose needs to be i ... Read More
A 51-year-old member asked:
Dr. Bennett Werner
43 years experience Cardiology
long acting: You may begin to see some effect in 12 hours but it can take up to 5-7 days to begin to see a full effect.
A 30-year-old female asked:
Dr. Paul Harper
51 years experience General Surgery
A few days.: Most of the time the medication starts to work within a few days. However it frequently takes several weeks before you will see or feel and effect. It ... Read More
A 40-year-old member asked:
Dr. Philip Kern
42 years experience Endocrinology
Weeks: You may start to feel a difference in 1-2 weeks, but you need to give a new dosage 6 weeks before rechecking thyroid blood levels.
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A 33-year-old male asked:
Dr. Frances Ilozue
24 years experience Family Medicine
At least 1 week: Give it at least 1 week, may vary depending on some other factors. It takes about 3 days to reach steady plasma concentration.
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A 29-year-old female asked:
Dr. Ronald Krauser
51 years experience Rheumatology
It depends: It depends what condition you are using it to treat and it also depends on the dose of the drug used. It usually is very effective within 24-48 hours.
A 40-year-old member asked:
Dr. Clarence Grim
56 years experience Endocrinology
Propanolol: It will begin to work in a few minutes in some. But depends on what you are taking if for. IV works immediately.
A 45-year-old member asked:
Dr. James Lin
Dr. James Lin answered
50 years experience Urology
1-3 days ...: If it works for you, you will see a better urine flow within 1-3 after taking it. If not, one needs to concern about urethral stricture, which can not ... Read More
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A 38-year-old member asked:
Dr. Calvin Weisberger
50 years experience Cardiology
Lisinopril: Lisinopril is used for many things. For blood pressure changes can be seen in a week or so. For heart failure and other uses it can take 6 weeks or mo ... Read More
A female asked:
Dr. Charles Cattano
38 years experience Gastroenterology
Some variables here: IV is faster than oral, but what dose and for what indication (sleep, rash, allergy, etc.) are you questioning please.
A 38-year-old member asked:
Dr. George Valdez
Specializes in Family Medicine
Not long: It can be as little as 15-30 minutes, but sperm can last inside a woman's body up to 3-5 days.
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A 25-year-old female asked:
Dr. Clifford Gevirtz
39 years experience Anesthesiology
Less than 3 minutes: On a mucus membrane, slightly longer on skin. Be careful of over application as large doses can lead to met hemoglobinemia which looks like your lips ... Read More

90,000 U.S. doctors in 147 specialties are here to answer your questions or offer you advice, prescriptions, and more. Get help now:

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