Antibiotics for community-acquired pneumonia

There is no single antibiotic that suits everyone. The prescriber considers illness severity, age, pregnancy, allergies, kidney or liver problems, recent antibiotic use, other medicines, and whether care can be given safely at home.

This term describes a lung infection that begins outside a hospital or similar healthcare setting. Pneumonia can cause cough, fever, breathlessness, chest discomfort, fatigue, and confusion, although the pattern varies. Bacteria are one possible cause; viruses can produce a similar illness and do not respond to antibiotics.

A clinician may use an examination, oxygen reading, chest imaging, or laboratory tests to judge the diagnosis and severity. Acute bronchitis can also cause cough but affects the airways rather than the lung's gas-exchanging tissue, so its treatment may differ.

Take each dose exactly as directed and complete the prescribed course unless the treating clinician changes the plan. Check before combining the antibiotic with antacids, supplements, or other medicines, and report a previous serious antibiotic reaction before the first dose. Do not share tablets or save them for another chest illness.

Rest, drink enough fluid to avoid dehydration, and avoid smoking or vaping while the lungs recover. Arrange reassessment if symptoms are worsening or are not beginning to improve within the timeframe your clinician gave you. A review can check the diagnosis, complications, medicine absorption, and whether treatment needs changing.

Call emergency services for severe difficulty breathing, blue or grey lips, new confusion, collapse, marked drowsiness, or intense chest pain. Seek urgent assessment if breathing becomes rapidly harder, you cough up more than small streaks of blood, cannot keep fluids or medicine down, or pass very little urine.

A widespread blistering or peeling rash, swelling of the lips or tongue, wheezing, or trouble breathing after an antibiotic may be a serious allergic reaction and needs emergency help. Significant watery or bloody diarrhoea during or after treatment also warrants prompt medical advice.

Ask which findings support pneumonia, when improvement should be noticeable, and what should trigger reassessment. Confirm the dose schedule, how food affects the medicine, interactions with your regular treatments, and what to do after a missed dose. If you have lung disease or reduced immunity, ask whether follow-up should happen sooner.