💊 Drug Classifications & Functions
Have you ever wondered what the difference is between antibiotics and antihistamines? Understanding how drugs are categorized is the first step for any pharmacy professional to ensure patient safety and effective treatment.
Types of Drugs and Their Classifications
In pharmacy, drugs are grouped into classes based on their mechanism of action (how they work) and the specific conditions they are designed to treat.
| Drug Class | Function | Example |
|---|---|---|
| Antibiotics | Treat bacterial infections | Amoxicillin, Ciprofloxacin |
| Analgesics | Relieve pain | Paracetamol, Ibuprofen |
| Antihistamines | Reduce allergy symptoms | Loratadine, Cetirizine |
| Antidepressants | Treat depression and anxiety | Sertraline, Fluoxetine |
| Antipyretics | Reduce fever | Paracetamol, Aspirin |
| Antacids | Relieve indigestion and heartburn | Omeprazole, Ranitidine |
🧪 Drug Classification Chart

Generic vs. Brand Name
Every medication has a generic name (the active ingredient) and often one or more brand names (the commercial name given by the manufacturer).- 🔹 Generic: Ibuprofen | Brands: Advil, Nurofen
- 🔹 Generic: Paracetamol (US: Acetaminophen) | Brands: Tylenol, Panadol
📝 Professional Tip: Always check if a patient is familiar with the generic or the brand name. Since patents expire, the same active ingredient can have dozens of different brand names worldwide!
💊 Generic vs. Brand-Name Infographic
Source: International Drug Mart
Controlled Substances
Some medications are classified as controlled substances. These are drugs that have a potential for abuse, addiction, or can be dangerous if misused. As a pharmacist, you are legally responsible for their strict record-keeping and dispensing.
Morphine, Diazepam, Codeine, and Oxycodone.
⚠️ Controlled Substances Warning
Handling these substances requires strict adherence to local and international regulations to prevent diversion and ensure patient safety.

Source: Warning Safety Signs
Always verify the identity of the patient and the validity of the prescription when dispensing these medications.
DRUG MATCHER
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Multiple Choice: Drug Classifications and Terminology
Open Cloze: Complete the Sentences on Drug Classifications
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