doxycycline
Doxycycline is an antibiotic from the tetracycline family, widely used to treat various bacterial infections including respiratory tract infections, acne, and sexually transmitted diseases like chlamydia. It works by inhibiting protein synthesis in bacteria, thus preventing their growth and spread. Common side effects include nausea, vomiting, and sensitivity to sunlight; hence, patients are often advised to avoid sun exposure and use sunscreen. Doxycycline should not be taken with dairy products or antacids containing calcium, aluminum, magnesium, or iron as these can interfere with its absorption. This medication is generally well-tolerated but requires a prescription and should be used under medical guidance to ensure effectiveness and safety.