How Long Do Antibiotics Stay in Your System and What are the Side Effect

Did you ever wonder how long antibiotics stay in the human system? Antibiotics, also known as antibacterial, are medications that destroy or slow down the growth of bacteria.

How Long do Antibiotics stay in your System

What are Antibiotics?

Antibiotics are powerful medicines that fight certain infections and can save lives when used properly. They either stop bacteria from reproducing or destroy them.

Before bacteria can multiply and cause symptoms, the immune system can typically kill them. White blood cells (WBCs) attack harmful bacteria and, even if symptoms do occur, the immune system can usually cope and fight off the infection.

Sometimes, however, the number of harmful bacteria is excessive, and the immune system cannot fight them all. Antibiotics are useful in this scenario.

However, the first antibiotic was penicillin. Penicillin-based antibiotics, such as ampicillin, amoxicillin, and penicillin G, are still available to treat a variety of infections and have been around for a long time.

Although Several types of modern antibiotics are available, they are usually only available with a prescription in most countries. Topical antibiotics are available in over-the-counter (OTC) creams and ointments.

How Do Antibiotics Work Against Bacteria?

Antibiotics fight bacterial infections either by killing bacteria or slowing and suspending its growth. They do this by:

  • Attacking the wall or coating surrounding bacteria
  • Interfering with bacteria reproduction
  • Blocking protein production in bacteria

What are Antibiotics Made of?

How Long do Antibiotics stay in your System

The first beta-lactam antibiotic, penicillin, was discovered by accident. It was growing from a blob of mold on a petri dish. Scientists found that a certain type of fungus naturally produced penicillin.

Eventually, penicillin was produced in large quantities in a laboratory through fermentation using the fungus.

Some other early antibiotics were produced by bacteria found in the ground soil.

However, today, all antibiotic medications are produced in a lab. Some are made through a series of chemical reactions that produce the substance used in the medication.

Although, other antibiotics are at least partially made through a natural but controlled process.

This process is often enhanced with certain chemical reactions that can alter the original substance to create a different medication.

How Long Do Antibiotics Take to Work?

Antibiotics begin to work right after you start taking them. However, you might not feel better for two to three days.

How quickly you get better after antibiotic treatment varies. It also depends on the type of infection you’re treating.

Most antibiotics should be taken for 7 to 14 days. In some cases, shorter treatments work just as well. Your doctor will decide the best length of treatment and the correct antibiotic type for you.

Although you might feel better after a few days of treatment, it’s best to finish the entire antibiotic regimen in order to fully resolve your infection.

However, this can also help prevent antibiotic resistance. Don’t stop your antibiotic early without first talking with your healthcare provider.

What is Antibiotic Resistance?

How Long do Antibiotics stay in your System

Antibiotics are powerful medications that work very well for certain types of illnesses. However, some antibiotics are now less useful than they once were due to an increase in antibiotic resistance.

Antibiotic resistance occurs when certain antibiotics can control or kill bacteria. In some cases, this can mean there are no effective treatments for certain conditions.


A doctor prescribes antibiotics for the treatment of a bacterial infection. It is not effective against viruses. Knowing whether an infection is bacterial or viral helps to effectively treat it.

Viruses cause upper respiratory tract infections (URTIs), such as the common cold and flu. Antibiotics do not work against these viruses.

Furthermore, if people overuse antibiotics or misuse them, the bacteria might become resistant.

This means that the antibiotic becomes less effective against that type of bacterium, as the bacterium has been able to improve its defenses.

Side Effects

Antibiotics commonly cause the following side effects:

  • Diarrhea
  • Nausea
  • Vomiting
  • Rash
  • Upset stomach
  • With certain antibiotics or prolonged use, fungal infections of the mouth, digestive tract, and vagina


Taking Antibiotics Effectively

Antibiotics are most effective when used appropriately. This starts with ensuring that you really need the antibiotic. Only use antibiotics prescribed by your doctor for a bacterial infection.

How Long Do Antibiotics Stay in Your System?

After taking an oral dose of amoxicillin, 60% of it will be out of your system in 6 to 8 hours. The body excretes amoxicillin in the urine.

It can take longer to get rid of amoxicillin in people with decreased kidney function, including the elderly. Side effects are more likely when this happens.

However, we hope, this information has been useful to you, please share it on your media platforms and with friends.

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