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Does caffeine thin your blood

A 46-year-old member asked:
Dr. Tamanna Nahar
Specializes in Cardiology
Caffiene/thin blood: Caffeine is a stimulant thus raising BP as a water pill” that increases urination. But it does not have an effect on blood thinning.

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A 28-year-old male asked:
Dr. Gurmukh Singh
Pathology 49 years experience
Sort of: Anticoagulants do not thin blood, it is just a term used for the benefit of lay persons. It is a complicated issue to address in this forum. Try this ... Read More
Dr. Charles Whiting
Obstetrics and Gynecology 27 years experience
An example may help: Heart-attacks are frequently caused by the rupture of a plaque in an artery in the heart. A clot forms over the injury but this also occludes the ves... Read More
A 38-year-old female asked:
Dr. Payam Mehranpour
Cardiology 23 years experience
Effective: Anticoagulation is effective however options are limited in pregnancy. Anticoagulation reduces risk of abnormal clotting in most, however does not eli... Read More
A 38-year-old female asked:
Dr. Mark Rasak
Cardiology 33 years experience
Yes but...: Yes but nothing is perfect. We always have to weigh risk vs benefit. If we are aggressive with anticoagulant you are unlikely to have clots. If too a... Read More
A 41-year-old member asked:
Dr. Gurmukh Singh
Pathology 49 years experience
No: Caffeine does not affect blood counts, unless you take enough to cause dehydration, and even then it is not a real increase.
A 31-year-old male asked:
Dr. Luis Villaplana
Internal Medicine 35 years experience
Challenge test: Other than watching to see what happens after you drink caffeine, no blood or other testing is available.
A 35-year-old male asked:
Dr. Alan Wartenberg
A Verified Doctoranswered
A US doctor answeredLearn more
No: actually, caffeine and other stimulants REDUCE blood flow, and actually can be used to treat priapism caused by other drugs. There are reports that t... Read More
A 28-year-old male asked:
Dr. Karen Butler
Family Medicine 21 years experience
Yes it can: It can so drink coffee in moderation
A 48-year-old member asked:
Dr. Gurmukh Singh
Pathology 49 years experience
Blood sugar: Caffeine intake can affect blood sugar results. It may also affect the level of some drugs related to caffeine.
A 37-year-old member asked:
Dr. Nathan Almeida
Cardiology 23 years experience
Yes: Caffeine is a stimulant and can increase both blood pressure and heart rate.

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