For more than a century, an appendicitis diagnosis usually came with a remarkably predictable sequel: an appendectomy. The inflamed appendix was removed, the patient recovered, and that troublesome little pouch never caused another problem. It was medicine’s version of permanently deleting an app that kept crashing.
Today, the treatment conversation is more interesting. Research shows that some adults with uncomplicated acute appendicitis can begin treatment with antibiotics instead of immediately undergoing surgery. This antibiotics-first approach does not make appendectomy obsolete, nor does it turn appendicitis into a condition that should be managed at home with leftover pills. It creates a legitimate second option for carefully selected patients who have been evaluated in a hospital.
The choice between antibiotics and appendectomy depends on imaging findings, symptom severity, overall health, access to follow-up care and personal priorities. Understanding those factors can help patients participate in a meaningful shared decision rather than feeling as though the operating room doors are already swinging open.
What Is Appendicitis?
Appendicitis is inflammation of the appendix, a narrow pouch attached to the beginning of the large intestine. The condition often develops when the opening of the appendix becomes blocked. Bacteria can multiply inside the trapped space, causing swelling, infection and increasing pressure.
The classic symptom is abdominal pain that begins near the belly button and later moves to the lower-right side. The pain may become sharper and worsen with walking, coughing or sudden movement. Nausea, vomiting, loss of appetite, fever, bloating, constipation or diarrhea may also occur.
Not every patient follows the classic script. Children, older adults and pregnant people may have pain in a different location or less obvious symptoms. Kidney stones, ovarian conditions, urinary infections, intestinal inflammation and other problems can also imitate appendicitis, which is why self-diagnosis is risky.
Untreated appendicitis can progress to tissue damage, perforation, an abdominal abscess, peritonitis or sepsis. Worsening or persistent abdominal pain therefore requires urgent medical evaluation, even if the patient would strongly prefer to avoid surgery.
Why Appendectomy Has Been the Standard Treatment
An appendectomy removes the source of the current inflammation and practically eliminates the risk of future appendicitis. In uncomplicated cases, surgeons usually perform the procedure laparoscopically through several small incisions. Many patients leave the hospital the same day or after an overnight stay.
Modern appendectomy is generally safe, effective and definitive. That last advantage matters. Once the appendix is gone, the patient does not have to wonder whether the next mysterious stomachache is round two.
Surgery nevertheless has real burdens. It requires anesthesia, incisions and recovery time. Possible complications include bleeding, surgical-site infection, an internal abscess, injury to nearby structures, bowel obstruction, hernia or reactions to anesthesia. Complications are uncommon in otherwise healthy patients with uncomplicated appendicitis, but “uncommon” is not the same thing as “imaginary.”
Work responsibilities, childcare, insurance costs and fear of an operation may also influence a patient’s preferences. These concerns helped motivate researchers to ask a simple question: Could antibiotics control the infection well enough for some patients to avoid immediate surgery?
How Antibiotics Can Treat Appendicitis
Antibiotics target the bacteria involved in the infection while the body’s inflammatory response settles. In a hospital, treatment may begin with intravenous medication, fluids, pain control and observation. The patient may later switch to oral antibiotics to complete a prescribed course.
The exact drugs, route and duration vary among hospitals and patients. Clinicians select therapy that covers the types of bacteria commonly found in the digestive tract while considering allergies, kidney function, pregnancy, local resistance patterns and other medical factors.
Antibiotics do not physically remove a blockage or an appendicolith. They also do not guarantee that the inflammation will resolve. Some patients worsen during the initial treatment period and need an appendectomy before leaving the hospital. Others improve, return home and undergo surgery weeks, months or years later because appendicitis comes back.
For that reason, antibiotics-first treatment is better described as a strategy than as a one-time miracle. Surgery remains available when medication fails or the condition recurs.
What Major Research Has Found
The CODA Trial
The Comparison of Outcomes of Antibiotic Drugs and Appendectomy trial, commonly called CODA, was the largest randomized U.S. study comparing these treatments. It included adults with imaging-confirmed appendicitis and was designed to reflect real emergency-room practice.
At 30 days, antibiotics were comparable to appendectomy based on a standard measure of general health. Patients assigned to antibiotics often missed less work or school during the first few months. However, nearly three in ten participants in the antibiotics group had undergone an appendectomy within 90 days.
Longer follow-up made the trade-off clearer. Many patients continued to avoid surgery, but the percentage receiving an appendectomy increased over time. Depending on the patient group and follow-up period, research suggests that approximately one-quarter to one-third may need surgery relatively early, while as many as half may undergo an appendectomy within several years.
Evidence From Multiple Randomized Trials
A 2025 analysis combining individual data from six randomized trials studied more than 2,100 adults with imaging-confirmed acute appendicitis. About two-thirds of those initially assigned to antibiotics avoided an appendectomy during the first year.
The one-year complication rate was not higher overall with antibiotics than with immediate appendectomy. However, roughly one-third of the antibiotics group underwent surgery during that year. The findings reinforce a practical message: Antibiotics can safely spare many selected adults from immediate surgery, but they are less definitive.
These numbers should not be treated like a weather forecast for one individual. A patient’s imaging results and clinical condition may push the probability substantially higher or lower.
The Appendicolith Question
An appendicolith is a small, hardened deposit inside the appendix. It is sometimes described as an appendix stone, although nobody receives a souvenir gem after the CT scan.
This finding can change the treatment discussion because an appendicolith may continue obstructing the appendix even after antibiotics reduce the infection. Research has consistently linked it to a higher chance of medication failure, complications and later appendectomy.
In the 2025 patient-level analysis, nearly half of antibiotic-treated patients with an appendicolith underwent an appendectomy within one year. They also experienced more complications than comparable patients who received immediate surgery. By contrast, patients without an appendicolith had a substantially lower likelihood of needing surgery during that period.
An appendicolith does not automatically remove every element of patient choice, but it makes appendectomy a more attractive and often more strongly recommended option.
Who May Be a Candidate for Antibiotics-First Treatment?
The strongest candidates are generally adults with imaging-confirmed uncomplicated appendicitis who are clinically stable and able to return quickly if symptoms worsen. A favorable evaluation may include:
- No free perforation or widespread peritonitis.
- No uncontrolled sepsis or unstable vital signs.
- No large abscess requiring drainage.
- No concerning mass or suspected tumor.
- No severe immune suppression or other condition that makes treatment failure especially dangerous.
- No appendicolith, although individual decisions may vary.
- Reliable access to follow-up care and emergency transportation.
- A clear understanding that surgery may still become necessary.
Children, pregnant patients, older adults and people with significant chronic illnesses require individualized specialist assessment. Research findings from otherwise healthy adults should not be copied and pasted onto every population like a universal instruction manual.
When Surgery Is Usually the Better Choice
Immediate appendectomy is commonly favored when imaging or examination suggests a perforation, spreading infection, gangrene, diffuse peritonitis or another surgical emergency. It may also be preferred when symptoms are rapidly worsening or antibiotics fail to produce prompt improvement.
A patient may reasonably choose surgery even with uncomplicated appendicitis. Some people value certainty more than avoiding an operation. They would rather handle a short recovery now than accept the possibility of another emergency-room visit during a vacation, examination week or particularly inconvenient Tuesday.
Surgery may also be practical when follow-up care is uncertain. An antibiotics-first strategy depends on recognizing warning signs and returning without delay. Someone who lives far from emergency care or cannot reliably obtain follow-up may have a narrower safety margin.
Benefits of Choosing Antibiotics First
The most obvious benefit is the possibility of avoiding an operation, anesthesia and surgical wounds. Patients who improve promptly may return to daily activities sooner and use fewer prescription pain medications. Some also miss fewer days of work or school during the initial recovery period.
A nonoperative approach can be particularly valuable when surgery carries extra risk because of another medical condition. It may also give a patient time to recover from acute inflammation before any later procedure becomes necessary.
These advantages are meaningful, but they are not free samples. They are exchanged for uncertainty, follow-up responsibilities and a measurable chance of future appendectomy.
Risks and Limitations of Antibiotic Treatment
Treatment Failure
Pain, fever or inflammation may continue despite medication. When that happens, clinicians may recommend urgent surgery. Choosing antibiotics does not mean signing a lifelong contract against appendectomy.
Recurrent Appendicitis
Because the appendix remains in place, appendicitis can return. Recurrence may require another course of evaluation, imaging, hospitalization and eventually surgery.
Medication Side Effects
Antibiotics can cause nausea, diarrhea, abdominal discomfort, yeast infections, allergic reactions and interactions with other medications. More serious complications, including severe antibiotic-associated diarrhea, are less common but possible.
Antibiotic Resistance
Antibiotics should be used only when medically appropriate and exactly as prescribed. Stopping treatment early, sharing medication or taking leftover pills may contribute to treatment failure and antibiotic resistance.
Missed Alternative Diagnoses
Appendicitis-like symptoms can occasionally be caused by inflammatory bowel disease or a tumor. Imaging, clinical follow-up and age-appropriate evaluation remain important, especially when symptoms behave unusually.
What to Expect During an Antibiotics-First Plan
The process begins in an emergency department, not beside a search engine at 2 a.m. Clinicians evaluate the pain pattern, perform an abdominal examination and order tests. Blood work may show inflammation or infection, while ultrasound, CT or MRI can confirm appendicitis and identify perforation, abscesses or an appendicolith.
If antibiotics are considered appropriate, the patient may receive intravenous fluids, medication for pain and nausea and an initial antibiotic dose. The medical team then watches for improvement. Decreasing pain, stable vital signs and an ability to drink fluids are reassuring signs.
Some selected patients can continue treatment at home. They receive instructions about medication, diet, activity, follow-up and symptoms that require an immediate return. Depending on the hospital protocol and clinical response, another examination or phone follow-up may be arranged within days.
Warning Signs After Discharge
A patient should seek urgent reassessment for worsening or spreading abdominal pain, persistent vomiting, increasing fever, fainting, confusion, marked weakness, abdominal swelling or an inability to drink fluids. Improvement followed by a sudden return of severe pain also deserves prompt attention.
Pain temporarily easing does not always mean the danger has passed. A perforation can sometimes produce a brief change in pain before widespread abdominal inflammation develops.
How to Make a Shared Treatment Decision
A productive discussion should move beyond the oversimplified question, “Do you want surgery or not?” Patients can ask:
- Is my appendicitis uncomplicated?
- Does my scan show an appendicolith, perforation, abscess or mass?
- What is my estimated chance of needing surgery during this admission?
- How often do patients like me need an appendectomy within the next year?
- Can I receive some or all of the antibiotic treatment as an outpatient?
- How quickly must I return if symptoms worsen?
- What recovery restrictions would apply after surgery?
- How could my other medical conditions affect either option?
The “best” treatment depends partly on what the patient values. One person may prioritize avoiding anesthesia and returning to work quickly. Another may prioritize definitive treatment and the lowest possible risk of recurrence. Both preferences can be reasonable when the clinical circumstances allow either approach.
Experiences With Antibiotics Instead of Appendectomy
The following stories are illustrative composites, not reports about specific patients. They reflect common situations described in appendicitis research and shared decision-making programs.
Experience One: Avoiding Surgery and Returning to Work
Imagine a 32-year-old office manager who develops increasing lower-right abdominal pain during a workday. A CT scan confirms uncomplicated appendicitis without an appendicolith. The surgeon explains that an appendectomy would be definitive but that antibiotic treatment is also reasonable.
The patient chooses antibiotics because she wants to avoid anesthesia and has limited paid leave. She receives intravenous medication and observation, feels noticeably better by the following morning and completes treatment with oral antibiotics at home.
For the first week, every stomach gurgle receives more attention than it deserves. She checks her temperature, follows the discharge instructions and keeps the hospital number nearby. The discomfort steadily fades, and she resumes light work sooner than she expected.
Two years later, she has not experienced another episode. For her, antibiotics achieved exactly what she wanted: recovery without surgery. She understands that recurrence remains possible, but she considers the trade worthwhile.
Experience Two: Antibiotics First, Surgery Later
Now consider a 45-year-old delivery driver with uncomplicated appendicitis and no appendicolith. He improves after antibiotic treatment and returns home, pleased to have avoided an operation during the busiest part of his work season.
Eight months later, familiar pain returns. Because he recognizes the symptoms, he seeks care early. Imaging confirms recurrent appendicitis, and this time he chooses laparoscopic appendectomy.
He does not necessarily view the first treatment as a failure. Antibiotics allowed him to postpone surgery during an inconvenient period, and the later procedure was performed before a perforation developed. Still, he experienced two emergency evaluations instead of one and paid for additional imaging and medical care.
This journey highlights the central compromise of antibiotics-first treatment: avoiding immediate surgery does not guarantee avoiding surgery forever.
Experience Three: An Appendicolith Changes the Decision
A 27-year-old graduate student arrives at the hospital hoping strongly to avoid an operation. The scan confirms appendicitis but also reveals an appendicolith. The surgeon explains that antibiotics remain possible in some settings, yet the chance of needing an appendectomy within a year is much higher and complications are more common than in patients without the deposit.
After discussing recovery time, insurance coverage and upcoming examinations, the student chooses surgery. The procedure is laparoscopic, and the appendix has not ruptured. Recovery includes several sore days and temporary lifting restrictions, but the immediate problem is resolved.
Although this person originally wanted antibiotics, shared decision-making did not mean automatically selecting the least invasive option. It meant understanding how one imaging detail changed the balance of risk.
The Emotional Side of the Choice
Patients often describe more than physical discomfort. Choosing antibiotics can bring relief about avoiding surgery but anxiety about recurrence. Choosing appendectomy can bring fear before the operation but reassurance afterward.
Neither reaction is silly. Treatment decisions are made by humans, not probability calculators wearing hospital gowns. Clear explanations, written return precautions and an opportunity to ask questions can make either path feel less overwhelming.
Conclusion
Antibiotics are now an evidence-supported alternative to immediate appendectomy for selected adults with imaging-confirmed, uncomplicated acute appendicitis. Many patients who start with antibiotics avoid surgery for at least a year, experience fewer initial disruptions and recover without an incision.
The strategy also carries uncertainty. Some patients need an appendectomy within days, while others experience recurrent appendicitis months or years later. An appendicolith substantially increases the likelihood of surgery and may increase complication risk when antibiotics are chosen first.
Appendectomy remains the definitive treatment and is often the safer choice for complicated appendicitis, unstable patients and those with unfavorable imaging findings. The most sensible decision comes from combining medical evidence with the patient’s individual risks, responsibilities and preferences.
Important note: Suspected appendicitis is a medical emergency. This article is for general education and cannot determine whether antibiotics or surgery are appropriate for a particular person. Do not take leftover antibiotics or delay emergency evaluation for worsening abdominal pain.
