A sinus infection (sinusitis) can be treated with antibiotics when it is caused by bacteria. Sinus symptoms from other causes ...

Antibiotics must often be used in treatment of sinusitis. Their choice is often empiric, since nasal cultures do not accurately reflect the pathological microbiology inside the sinuses ...

Other kinds of headaches that keep coming back, such as migraines or tension headaches, are often mistaken for sinus headaches. Because the treatment you need depends on the type of headache you ...

Since cultures are difficult to obtain and are unreliable without sinus puncture, antibiotics must be selected based upon up-to-date regional knowledge of likely pathogens. Studies have ...

So you never want to take an antibiotic just to be safe. Most common illnesses are viral. That means a cold, flu, coughs, most sore throats and sinus infections shouldn't be treated by antibiotics.