Doxycycline vs. Amoxicillin

An error occurred trying to load this video.

Try refreshing the page, or contact customer support.

Coming up next: Doxycycline vs. Tetracycline

You're on a roll. Keep up the good work!

Take Quiz Watch Next Lesson
Your next lesson will play in 10 seconds
  • 0:03 Antibiotics
  • 0:34 Doxycycline
  • 2:19 Amoxicillin
  • 3:22 Lesson Summary
Save Save Save

Want to watch this again later?

Log in or sign up to add this lesson to a Custom Course.

Log in or Sign up

Speed Speed

Recommended Lessons and Courses for You

Lesson Transcript
Instructor: Artem Cheprasov
This lesson compares and contrasts two very well-known antibiotics called doxycycline and amoxicillin. Among other things, you'll find out if they work the same way and target the same bacteria.


There's a good chance that you can thank antibiotics for being alive. Antibiotics are drugs that target bacteria and either kill them outright or prohibit them from multiplying. If you've ever had a bacterial infection, you've probably relied on them to feel better, or even survive.

There are many different antibiotics, and two very well-known ones are called doxycycline and amoxicillin. In this lesson, we'll go over some brief but important points about each medication and then help you compare the two.


Doxycycline is the generic name for a lot of different medications that contain it, including Monodox and Vibramycin. It works by disabling a bacterium's ability to synthesize proteins. If it can't make proteins, the bacteria can't grow. This means that doxycycline is a bacteriostatic antibiotic, which translates roughly as something that inhibits (-static) bacteria (bacterio-).


Doxycycline is used to target a broad variety of bacteria and the conditions they may cause. As a result, it's sometimes called a broad-spectrum antibiotic. It can treat many different forms of Gram-positive and Gram-negative bacteria. Gram-positive bacteria are those with thick cell walls, while Gram-negative bacteria have thinner cell walls.

Examples of Gram-positive bacteria whose growth doxycycline can inhibit include:

  • Bacillus anthracis, which causes the deadly disease anthrax
  • Streptococcus pneumoniae, which can lead to pneumonia

Examples of Gram-negative bacteria whose growth doxycycline can inhibit include:

  • Escherichia coli, which causes diarrhea
  • Neisseria gonorrhoeae, responsible for the sexually transmitted infection gonorrhea

This doesn't mean doxycycline is the only antibiotic that can deal with these bacteria or that it's the first line of defense for these issues. That's because factors like the availability of more effective or safer alternatives, as well as bacterial resistance and a person's other medical conditions, can all play a role in deciding if doxycycline, or another antibiotic, should be used.

With that in mind, conditions that doxycycline is sometimes used to treat include:

  • Eye infections
  • Gonorrhea
  • Intestinal infections
  • Malaria
  • Rosacea
  • Urinary tract infections

To unlock this lesson you must be a Member.
Create your account

Register to view this lesson

Are you a student or a teacher?

Unlock Your Education

See for yourself why 30 million people use

Become a member and start learning now.
Become a Member  Back
What teachers are saying about
Try it risk-free for 30 days

Earning College Credit

Did you know… We have over 200 college courses that prepare you to earn credit by exam that is accepted by over 1,500 colleges and universities. You can test out of the first two years of college and save thousands off your degree. Anyone can earn credit-by-exam regardless of age or education level.

To learn more, visit our Earning Credit Page

Transferring credit to the school of your choice

Not sure what college you want to attend yet? has thousands of articles about every imaginable degree, area of study and career path that can help you find the school that's right for you.

Create an account to start this course today
Try it risk-free for 30 days!
Create an account