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Fort Lauderdale, FL
A 17-year-old female asked:

why are antibiotics doses spred out throughout the day why can't it be taken all once?

1 doctor answer2 doctors weighed in
Dr. Kenneth Grossman
Endodontics 44 years experience
Blood levels: Taking antibiotics all at once will spike the blood level and then be metabolized and excreted. Taking them over a period of time keeps the blood level constant, allowing the drug to get to the affected area constantly so infection can be eliminated.

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Similar questions

A 24-year-old member asked:

Is it ok to take just one antibiotic a day?

2 doctor answers5 doctors weighed in
Dr. Holly Barth
Dr. Holly Barth answered
General Practice 9 years experience
Full Amount: It is best to take your antibiotics exactly as your physician prescribes. So take the full amount a day, and for the full length of time. If you miss a dose, try to take it as soon as you remember without taking multiple doses at one time. And it is important that even if you're feeling better after a few days-still take the full prescription to make sure you're rid of the infection.
A 18-year-old member asked:

Is it bad to take one antibiotic after another with a two day gap?

1 doctor answer3 doctors weighed in
Dr. Paul Williams
Family Medicine 35 years experience
Antibiotics: I guess my question is why? Was the first one ineffective? If so - if then no - if the symptoms returned - ie partially treated infection - if its a second round of the first antibiotic - thats not good. But if its being done because the cultures show that the first antibiotic wasn't effective or clinically it wasn't effective there should be no harm - you might have GI upset though.
A 46-year-old member asked:

I have been sick for 8 days and on my second antibiotic and still sick..Is there anything i can do?

1 doctor answer1 doctor weighed in
Dr. Ajay Acharya
A Verified Doctor answered
A US doctor answered Learn more
Yes: Have a CBC done. That will indicate the nature of your infection. The matching ant and synchronised antihistamine/ mucolytic agent / hydration will help. Assuming you have a urti, which is going around.
Woodland Hills, CA
A 35-year-old female asked:

If it says to take a certain antibiotic 3 times a day, does that mean i can take it at 9am, 3pm and 9pm? Or do I have to take it in middle of night?

2 doctor answers3 doctors weighed in
Dr. John Munshower
Family Medicine 30 years experience
9/3/9 ok: Three times a day is ok as you have it. "every 8 hours" might require you to get up at night.
A 48-year-old member asked:

I have taken antibiotics for four days and they aren't working. What do I do?

1 doctor answer1 doctor weighed in
Dr. Joseph Bouvier
Pediatrics 25 years experience
See below: Likely a viral illness or a resistant bacteria. Talk to your doctor for more recs.

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Last updated Feb 20, 2013

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