Why you may not need all those days of antibiotics

A recent article in the British Medical Journal set off a bit of a firestorm with its claim that “the antibiotic course has had its day.” The authors challenged the very widespread belief that you should keep taking every last dose of antibiotic prescribed by your physician even after you feel better. This advice has long been claimed to be key to preventing antibiotic resistance.

The challenge to that claim has sparked a backlash, with physicians and public health officials expressing concern about an overly complex message that could result in encouraging patients to go rogue and ignore their doctors’ prescriptions.

All of this is a bit amusing to experts like me, who have been actively challenging this silly dogma for a long time, but without the recent media attention. So let me try to bring some clarity to the debate, which really isn’t that complex, so you understand what to do when your doctor gives you a prescription for antibiotics.

I’ll start with the bottom line first. It is absolutely false that continuing to take antibiotics after you feel completely better will reduce the emergence of antibiotic resistance. Quite to the contrary, it will very likely promote the emergence of antibiotic resistance.

How did we get to this point, with such a huge gulf between reality and dogma? And how could so much of the medical community have been so wrong for so long?

Let’s make one thing explicitly clear. Historically, doctors and patients have both been pretty dreadful about using antibiotics appropriately. We’ve long prescribed antibiotics out of fear and habit, not science.

Indeed, as far back as 1945, Alexander Fleming, the man who discovered penicillin in 1928, warned the public that people were taking penicillin to treat diseases not caused by bacteria, and that this unnecessary use of penicillin was going to breed out antibiotic resistance. He warned that those who so abused penicillin would be “morally responsible” for the deaths that ensued from penicillin-resistant infections.

He was right.

The sad thing is, society never did listen. Recent data confirm that our use of antibiotics has gotten no better in the modern era.

It has been estimated that 30 to 50 percent of antibiotic use in the U.S. is unnecessary. In my opinion, those numbers are rather hilariously low. I would that estimate 75 percent or more of antibiotic use is unnecessary. You see, I, and experts like me, have a more stringent definition of when antibiotic use is appropriate or not, which includes giving too long a course of antibiotics to patients who need them.

Not only is there absolutely no evidence that taking antibiotics past when you feel better will reduce antibiotic resistance, it doesn’t even make sense. The fact is, the longer you take an antibiotic for, the greater the chance that antibiotic-resistant bacteria will emerge in your body and in the environment around you.

There are some chronic infections, such as tuberculosis, where you do indeed have to take long courses of antibiotics, not to prevent resistance, but rather to cure the infection. But for most acute bacterial infections, short courses of antibiotics result in equivalent cure rates, and with less chance of causing the emergence of antibiotic resistance among the bacteria in and on your body. Furthermore, the shorter-course regimens led to lower rates of antibiotic resistance.

So, what should we do about antibiotic courses?

Medicine in the 21st century is a team sport. You and your physician need to be partners in decision-making. If you are sick and your doctor mentions antibiotics to you, the first thing you should say is, “Hey, doc, do I really need the antibiotic?”

If your doctor says, “Yes, I believe you have a bacterial infection and you need the antibiotic,” the next question is, “OK, can we treat for a short course?”

Third, after you begin taking the antibiotics, if you feel much better before you complete the course, give your doctor a call and ask if you can safely stop therapy.

So, the bottom line is, doctors should prescribe as short a course of antibiotics as possible to treat your bacterial infection. If you feel completely well before you finish that course, you should be encouraged to call your physician to discuss if it is safe to stop early.

See, it’s not so complicated after all.

This story was originally published August 4, 2017 at 1:00 PM with the headline "Why you may not need all those days of antibiotics."