Antibiotics: What You Need to Know

What antibiotics actually treat, why finishing the full course matters, and how antibiotic resistance affects everyone — not just the person taking the prescription.

What Antibiotics Treat — and What They Don't

Antibiotics kill or stop the growth of bacteria. They do nothing against viruses, which means they will not help a cold, most sore throats, the flu, or most sinus infections — all of which are viral in the vast majority of cases. Taking an antibiotic for a viral illness doesn't speed recovery; it only adds side effects and contributes to resistance.

Finish the Full Course

One of the most persistent pieces of pharmacy advice is also one of the most important: finish your antibiotics exactly as prescribed, even once you feel better. Stopping early can leave behind the hardiest bacteria — the ones most likely to survive and multiply, sometimes as a resistant strain.

Antibiotic Resistance, Explained Simply

Every time bacteria are exposed to an antibiotic and survive, they can pass resistance on. Over time, and across a whole population, this means common infections become harder to treat — not just for the person who misused the antibiotic, but for everyone.

• ✓Do take the full course, even after symptoms improve
• ✓Do take doses at evenly spaced times, as directed
• ✓Don't save leftover antibiotics for next time
• ✓Don't share antibiotics with another person
• ✓Don't pressure a prescriber for antibiotics for a likely viral illness

Common Side Effects

Upset stomach, diarrhea, and mild nausea are common with many antibiotics — taking them with food (unless directed otherwise) often helps. A probiotic can also ease gut side effects; ask us for a recommendation that won't interfere with your dose.

Call us or your doctor promptly for a rash, difficulty breathing, severe diarrhea, or any sign of an allergic reaction.

Safe Disposal of Leftovers

Never keep unused antibiotics for later, and never flush them. Bring any leftover or expired medication to Tartan Pharmacy — we dispose of it safely and at no charge.

Related Guides