Duration Health



Minor infections will often go away on their own without antibiotics. When the body isn't able to clear an infection on its own, or if a serious bacterial infection is suspected, antibiotics are sometimes used to treat the infection. There are also some viral infections like influenza that are treated with antiviral agents.

The choice of whether to use an antibiotic, and which antibiotic to use, is complex, and you should always seek the advice of a physician before initiating an antibiotic. Antibiotics treat only bacterial infections, but many infections are caused by viruses, not bacteria.

Each antibiotic is effective against certain groups of bacteria, but often it is not known which bacteria are responsible for a given infection. Practitioners will therefore often choose an antibiotic based on the part of the body in which the infection occurs, since certain classes of bacteria are most often responsible for infections in a particular organ system.

Do not take multiple antibiotics at once. A better strategy is to choose one antibiotic, take a full course, and contact a physician to discuss next steps if symptoms have not resolved after the full course is completed. There are cases where a physician may recommend that certain antibiotics be taken together, as a pair, for specific types of infections.

Infections that occur with fever, a change in someone’s behavior, lethargy, weakness, decreased urination, or rapid or shallow breathing, may indicate sepsis and are always a medical emergency. Seek help immediately.

If most infections are viral, why do I get better when I take an antibiotic when I'm sick?

Antibiotics are drugs specifically design to kill bacteria. Each class of antibiotics kills bacteria by interfering with a particular component of the bacterial cell that the bacteria needs to survive. Viruses don't have these components, so they simply aren't affected by antibiotics.

It's not uncommon, however, for people to report that they feel better after taking an antibiotic during a viral infection. Why?

One explanation is the placebo effect, a well-known and extensively studied phenomenon whereby people feel better after taking a pill, no matter what the pill contains. This effect is so strong that when new drugs are developed, they are compared to a pill containing an inactive ingredient, because test subjects will report or experience an effect just by taking a pill, whether the new drug is working or not.

Another explanation is that during the time a patient is taking an antibiotic, the body is fighting the viral infection on its own. By the time the antibiotic is finished, the body has cleared the infection, and the person feels better. But this would have happened without the antibiotic.

Yet another explanation is that some antibiotics have anti-inflammatory effects on the body as a whole, as a side effect of the antibiotic. This reduction in inflammation makes a person feel better, but it's not because the antibiotic is treating the infection. A regular anti-inflammatory drug, such as ibuprofen, may have the same effect without the potential side effects of the antibiotic.

If an antibiotic might help, why not just try it?

The decision to give an antibiotic is a balancing act between the antibiotic's benefits (potentially treating a bacterial infection) and risks (side effects). These side effects can be serious. While you may have never personally experienced side effects from an antibiotic, experienced practitioners know that these side effects are in fact very common.

Side effects from antibiotics include diarrhea (the most common), allergic reaction (ranging from mild rash to life-threatening anaphylaxis), and, paradoxically, infection with a different microorganism. Because antibiotics are designed to kill bacteria, they also kill "good" bacteria in the body. (See: Human Microbiome) The loss of "good" bacteria gives "bad" bacteria (and fungi) an opportunity to grow and make you sick. A number of antibiotics also may have harmful drug interactions with commonly used medications that a person may already be taking for other conditions.

The bottom line is that the decision to start an antibiotic is synonymous with deciding that the benefits outweigh the risks. If the benefits are in doubt, it would be unwise to assume the risks.


Ciprofloxacin (generic for Cipro) is a fluoroquinolone antibiotic. It can be used to treat infections in the abdomen. Consider ciprofloxacin for diarrhea with blood or mucous. Ciprofloxacin can be taken with ondansetron, if nausea and/or vomiting accompany abdominal pain or diarrhea. Do not take ciprofloxacin with dairy products such as milk or yogurt, or with calcium-fortified juice. Ciprofloxacin is also used to treat other infections, for example, skin infections, sinus infections, urinary tract infections, and infections with some bioterrorism agents including anthrax.


Urine test strips are an amazing and inexpensive diagnostic tool. They can be used to detect urinary tract infections, dehydration, diabetes, and blood in the urine. A urine test showing positive leukocytes or nitrites may indicate a urinary tract infection. A high specific gravity or ketones in the urine may indicate dehyration. Glucose in the urine is a sign of uncontrolled diabetes.


Ofloxacin is an antibiotic. Ofloxacin drops can be used to treat eye or ear infections.


Oseltamivir (generic for Tamiflu) treats influenza.


Doxycycline is an antibiotic. Doxycycline can be used to treat Lyme disease, Yersinia (bubonic plague), Tularemia, and other infections. This medication should be taken with food.


Atovaquone-proguanil (generic for Malarone) is used for malaria prophylaxis in areas with chloroquine-resistant Plasmodium falciparum, and can be used in most parts of the world where malaria occurs. Take it daily for 1-2 days before possible exposure to malaria, and continue daily for 7 days after leaving an exposed area. If you plan to travel to malaria-endemic areas, discuss with your Duration Health provider to determine which prophylaxis is appropriate for you.


Trimethoprim-sulfamethoxazole (TMP-SMX, generic for Bactrim, and also abbreviated SMZ-TMP) is an antibiotic. It can be used to treat urinary tract infections and skin infections, and can be used to treat infections caused by MRSA (Methicillin-resistant S. aureus) bacteria.


Metronidazole (generic for Flagyl) is an antiprotozoal and antibiotic, which means it fights bacteria as well as other organisms that cause disease. Metronidazole can be used to treat infections in the abdomen.


Ivermectin is used to treat parasite infections like head lice and scabies. This medication should be taken on an empty stomach.


Azithromycin is an antibiotic. Azithromycin can be used to treat respiratory infections like pneumonia, abdominal infections, ear infections, throat infections, and other infections. It is often used in place of penicillin drugs in people with a penicillin allergy. It has a longer duration of action than other antibiotics, so it is usually given for a shorter course of therapy.


Mupirocin (generic for Bactroban) is an antibiotic ointment. Mupirocin can be used to treat a localized skin infection, including infections caused by methicillin-resistant S. aureus bacteria (MRSA).


Nitrofurantoin (generic for Macrobid) is an antibiotic used specifically to treat urinary tract infections.


Amoxicillin-clavulanate (generic for Augmentin) is an antibiotic. It can be used to treat skin infections like bite wounds, ear infections, sinus infections, tooth infections, and other infections. This medication should be taken with food.


Amoxicillin is an antibiotic. It is used to treat infections of the ear, nose, throat, urine, skin, and lungs.


Trimethoprim-sulfamethoxazole (TMP-SMX, generic for Bactrim, and also abbreviated SMZ-TMP) is an antibiotic. It may be used to treat urinary tract or ear infections in pediatric patients. Other antibiotics are usually preferred as first-line treatment options.


Levofloxacin (generic for Levaquin) is an antibiotic. It is used to treat pneumonia, urinary tract infections, prostatitis, anthrax, and bubonic plague. It is in the fluoroquinolone category of antibiotics.


Cephalexin (generic for Keflex) is an antibiotic. It is used to treat respiratory infections, ear infections, skin infections, and urinary tract infections. It is in the cephalosporin category of antibiotics.


Clindamycin is an antibiotic. Is is used to treat serious respiratory tract, skin, and soft tissue infections. Clindamycin is used to treat infections cause by a class of bacteria called anaerobic bacteria. Clindamycin is sometimes used in place of penicillin-family antibiotics in people allergic to penicillin.


Clotrimazole is an antifungal cream. It is used to treat fungal infections of the skin. Clinical improvement, with relief of itching, usually occurs within the first week of treatment.


Brought to you by emergency physicians

Be your own first responder

Learn What To Do In a Medical Emergency

Get our free email series, Where There is No Doctor. We’ll teach you how to treat the most common medical issues, anywhere.

Available in

Serving travelers since 2019 and shelterers-in-place since 2020

[email protected]
Two Embarcadero Center | 8th Floor
San Francisco, CA 94111
(855) 340-8969

Privacy Policy
Notice of Privacy Practices
Terms and Conditions

© 2020 Duration Health
We're hiring!

Only your Duration Health provider can decide, based on your medical history and other factors, whether it is medically appropriate for you to receive prescriptions. We do not sell prefabricated bags of pharmaceuticals. Each Duration Health Med Kit is custom assembled, tailored to each individual patient's needs.

You must complete the included online telehealth visit, including a complete medical history and ID verification, before any prescriptions are issued. You may not be eligible to receive items pictured or described on this site. Furthermore, renewal of your prescriptions is contingent upon continued medical appropriateness. Generics only. Brand names are listed on our site for your reference, but in most cases, only generic (non-brand) medications are included in our Med Kits. No controlled substances. Our formulary excludes controlled substances like opioids, benzodiazepines, and other potentially addictive medications. Treatment not guaranteed. No medication is guaranteed to work or guaranteed to treat a particular condition or disease. Use medications only as directed by a physician. Medication uses listed on this site are for educational purposes only and are not intended to represent indications for treatment. Duration Health is not a pharmacy and does not sell medications directly. To be able to deliver a customized kit of medications, Duration Health has partnered with a third-party mail order pharmacy. You may request that any prescriptions be sent to an alternate pharmacy. Email support only. Our providers are available via email to answer questions about your Med Kit. For non-emergency use only. In an emergency, call 911 or seek local emergency care. No routine care. Duration Health email support cannot be used for routine primary care. Medications prescribed by Duration Health cannot be used for routine purposes. This product is intended only for people who are unable to obtain regular medical care. You must anticipate living, working or traveling where care is unavailable. As a condition of purchase, you must consent to use of these medications only when regular access to medical care is unavailable. Your eligibility for Health Savings Account (HSA) or Flexible Spending Account (FSA) payment and reimbursement is not guaranteed; consult with your health plan, a qualified accountant, or a tax professional to determine your eligibility for reimbursement. Duration Health does not provide or claim to provide any medication or other item to prevent, treat or cure COVID-19.

The information provided on this site is intended for your general knowledge only and is not a substitute for professional medical advice or treatment for specific medical conditions. You should not use this information to diagnose or treat a health problem or disease without consulting with a qualified healthcare provider. Please consult your healthcare provider with any questions or concerns you may have regarding your condition. If you think you may have a medical emergency, call your doctor, go to the emergency department, or call 911 immediately.

See our Frequently Asked Questions (FAQ), Privacy Policy, Notice of Privacy Practices and Terms and Conditions for more important disclaimers.