What Happens If You Miss an Antibiotic?

Antibiotics eradicate harmful bacteria or prevent their proliferation, allowing the body’s immune system to overcome infection. Administering these medications precisely as directed by a healthcare professional is important to ensure their effectiveness.

How Antibiotics Work

Antibiotics function by targeting processes vital for bacterial survival and reproduction. Some, known as bactericidal agents, directly kill bacteria by disrupting their cell walls or interfering with their internal cellular contents. Others, termed bacteriostatic, inhibit bacterial growth by preventing them from multiplying, often by interfering with protein synthesis or DNA replication.

Immediate Impact of a Missed Dose

Missing an antibiotic dose can immediately disrupt the consistent concentration of the medication in the body. For antibiotics to be effective, their levels in the bloodstream and tissues must remain above a certain threshold to continuously suppress bacterial growth or kill them. When a dose is missed, this concentration can drop, potentially falling below the therapeutic level needed to inhibit the bacteria. This temporary dip allows surviving bacteria an opportunity to recover, multiply, and potentially regain strength.

Long-Term Risks of Inconsistent Dosing

Inconsistent antibiotic dosing carries significant long-term consequences, primarily the development of antibiotic resistance. When antibiotic levels fluctuate due to missed doses, some bacteria may survive exposure to suboptimal drug concentrations. These surviving bacteria are often the more resilient ones, possessing inherent mechanisms to withstand the antibiotic’s effects. As these tougher bacteria reproduce, they pass on their resistance traits, leading to a population that is less susceptible or entirely unresponsive to the antibiotic.

Consequences of Resistance

Consequently, the infection may worsen, persist, or recur, necessitating longer treatment durations, more potent and potentially more toxic drugs, or even hospitalization. The widespread emergence of antibiotic-resistant bacteria poses a substantial public health concern, complicating the treatment of common infections globally and increasing healthcare costs. In 2019, bacterial antimicrobial resistance was directly responsible for an estimated 1.27 million global deaths and contributed to nearly 5 million deaths.

What to Do If You Miss a Dose

If a dose of antibiotics is missed, it is generally advised to take the forgotten dose as soon as it is remembered. However, if it is almost time for the next scheduled dose, it is typically recommended to skip the missed dose and continue with the regular dosing schedule. It is important to never take a double dose to compensate for a missed one, as this can increase the risk of side effects like stomach pain, diarrhea, nausea, or vomiting. Always consult the patient information leaflet provided with the medication or contact a healthcare professional, such as a doctor or pharmacist, for specific guidance, especially if multiple doses have been missed.

Strategies for Adherence

Maintaining consistent antibiotic intake can be facilitated by employing practical strategies. Setting regular alarms on a phone or other device can serve as a reliable reminder for each dose. Utilizing a pill organizer can help track doses throughout the day, particularly for individuals taking multiple medications. Integrating medication times into daily routines, such as taking a dose with a specific meal or before brushing teeth, can also improve adherence. Keeping the antibiotic in a visible and easily accessible location can further reduce the likelihood of forgetting a dose.