Lower Respiratory Tract Infection

Key facts

• A lower respiratory tract infection (LRTI) affects the airways and lungs below the larynx: the bronchi, bronchioles, and lung tissue itself. Bronchitis and pneumonia are the common forms.
• Typical symptoms are a persistent cough, often with phlegm, chest tightness or pain on deep breathing, breathlessness on mild exertion, fever, and fatigue.
• Bacterial LRTIs, including community-acquired pneumonia and flare-ups of chronic bronchitis, are treated with antibiotics such as cefpodoxime. Viral infections do not respond to antibiotics.
• Seek urgent care for severe breathing difficulty, coughing up blood, bluish lips or fingertips, or confusion.

What an LRTI feels like

An LRTI feels different from a head cold. Expect a persistent cough, often producing phlegm, alongside chest tightness or pain when breathing deeply. Breathlessness on mild exertion, fever, and fatigue are typical, and wheezing can appear if the smaller airways are inflamed. Seasonal surges in respiratory illness make LRTIs one of the more common reasons people seek medical attention.

Treating a lower respiratory tract infection

Bacterial LRTIs, including community-acquired pneumonia and acute exacerbations of chronic bronchitis, are treated with antibiotics. Cefpodoxime is an oral third-generation cephalosporin active against common LRTI pathogens such as Streptococcus pneumoniae and Haemophilus influenzae. Viral infections do not improve with antibiotics; supportive care, rest, fluids, and fever control, is the mainstay until the body clears the virus on its own.

When to seek urgent care

Get medical help without delay if breathing becomes severely difficult, if you cough up blood, if your lips or fingertips turn bluish, or if confusion develops. These signs can point to a serious infection that needs hospital assessment rather than home treatment. Older adults, young children, and people with existing lung or heart conditions face a higher risk of complications and should be checked sooner rather than later, even when symptoms look mild at first.

Recovering at home

Once a diagnosis is confirmed and treatment is started, rest, adequate fluids, and paracetamol or another suitable painkiller for fever and discomfort support recovery alongside any prescribed antibiotic. A cough can linger for several weeks after the infection itself has cleared; this is common and does not usually mean the antibiotic has failed, though a cough that worsens again after initially improving is worth rechecking.

This page is educational and does not replace advice from a doctor or pharmacist who knows your health history.