Categories of Pain Medications
Pain medications are organized into several categories based on their mechanism of action and potency. Understanding these categories helps you answer PTCE questions about drug classification, controlled substance scheduling, and patient safety.
Non-Opioid Analgesics
Acetaminophen (Tylenol) is the most common non-opioid analgesic. It is available OTC and is also found in many combination products. An important safety point is the maximum daily dose limit, which helps prevent liver damage from excessive use.
NSAIDs
Nonsteroidal anti-inflammatory drugs include ibuprofen (Advil, Motrin) and naproxen (Aleve) available OTC, and prescription options like meloxicam (Mobic) and diclofenac (Voltaren). NSAIDs reduce both pain and inflammation. Key considerations include stomach irritation and kidney effects with prolonged use.
Opioid Analgesics
Opioids include medications like hydrocodone (often combined with acetaminophen as Norco), oxycodone (OxyContin, Percocet), tramadol, and morphine. Most opioids are Schedule II controlled substances, though tramadol is Schedule IV. These medications require careful handling, documentation, and storage in the pharmacy.
Adjuvant Pain Medications
Some medications not primarily designed for pain relief are used as part of pain management. Gabapentin (Neurontin) and pregabalin (Lyrica) are commonly used for nerve pain. Certain antidepressants like duloxetine (Cymbalta) are also used in pain management.
Key Exam Points
- Know which pain medications are controlled and their schedule
- Understand the difference between opioid and non-opioid analgesics
- Recognize common combination products (e.g., hydrocodone/acetaminophen)
- Be aware of key safety concerns for each class
Pain medications appear frequently on the PTCE because they span multiple topics including drug classification, controlled substances, patient safety, and order processing.