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Doctor insights on: How Quickly Can Antibiotics Affect A Blood Test

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Dr. John Leander Po
1,117 doctors shared insights

Antibiotic (Definition)

An antibiotic is a medicine that slows, stops, or kills germs. The germs are usually bacteria causing an infection in a person, so the person uses antibiotics to help his body get ...Read more


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Will my antibiotic alprim show up on a blood test? If so how long until it is out of my system ?

Will my antibiotic alprim show up on a blood test? If so how long until it is out of my system ?

No: Alprim is a sulfa antibiotic. I have done drug screening for twenty years and I am unaware of sulfa antibitotics having any cross reactivity with drug tests. Make sure you let the testes know you are or have recently taken the test. ...Read more

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Can my baby do blood test for liver when he is on antibiotics?

Can my baby do blood test  for liver when he is on antibiotics?

Why not: You can check blood any time, but is it necessary? Why do you want to check blood for your baby? Does his pediatrician order it? ...Read more

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Can l have my regular blood test done if l am on antibiotics about skin infection. Thanks?

Can l have my regular blood test done if l am on antibiotics about skin infection. Thanks?

Depends....: It all depends on what your "regular blood test" is as to whether it could be affected by being on antibiotics. If in question, ask the health care provider who orders your regular blood test or the one prescribing the antibiotics. ...Read more

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Blood test in 2 days to check for infection, but still have a days dose of antibiotics left. Do I take them? Will it affect results?

Blood test in 2 days to check for infection, but still have a days dose of antibiotics left. Do I take them? Will it affect results?

Complete the plan: Yes, please finish your antibiotics as prescribed. They work much better when you use them as planned. The test may be affected only if the antibiotics did not do their job. If you do not take them, they probably will not do a very good job. Hope that helps! ...Read more

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Bad headaches for several weeks (antibiotics haven't worked) and lump behind ear, near hairline (firm but moves) on blood test white blood high?

Bad headaches for several weeks (antibiotics haven't worked) and lump behind ear, near hairline (firm but moves) on blood test white blood high?

Different antibiotic: You may need a different antibiotic because fever, high white cell count, and severe persistent headache suggest an infection. You should see someone as soon as possible because the infection can potentially spread to the brain. ...Read more

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My baby have high sgot191.8u/l, sgpt189.5u/l, GGT 278u/l n birilubin5.2umol/l.He is on antibiotic when do the blood test. Didmy baby have liver disease?

My baby have high sgot191.8u/l, sgpt189.5u/l, GGT 278u/l n birilubin5.2umol/l.He is on antibiotic when do the blood test. Didmy baby have liver disease?

Abnormal liver tests: The numbers you gave show your baby has elevated liver enzymes and high bilirubin level. There are many reasons why these are high. If your baby is on an antibiotic for infection the infection - if serious - could be causing the liver to be inflamed and cause the higher numbers. Your baby's doctors can do other tests to see if the liver is having problems. ...Read more