ExCPT · Drugs and Drug Therapy · 7 min read
Prescription, OTC and Behind-the-Counter Products
- Differentiate between prescription drugs, over-the-counter medications, dietary supplements, and regulated behind-the-counter products.
- Identify key indications, mechanisms, side effects, and serious safety warnings for common nonprescription drug classes.
- Define the professional boundaries of the pharmacy technician regarding sales compliance, product location, and pharmacist referrals.
Product Classifications and Regulated Behind-the-Counter Sales
In community pharmacy practice, products are organized into distinct regulatory categories based on access and safety oversight. Prescription drugs, also called legend drugs, require an order from an authorized prescriber and bear the statement “Rx only” on their manufacturer labeling. In contrast, over-the-counter (OTC) drugs are determined by the FDA to be safe and effective for self-use without the supervision of a licensed healthcare practitioner. Most OTC drugs must display a standardized Drug Facts label listing active ingredients, uses, warnings, and directions. Dietary supplements do not carry this label and use Supplement Facts labeling instead.
Behind-the-counter (BTC) products occupy a unique category. These are nonprescription products kept behind the counter and subject to access controls, such as identification checks, sales records, or pharmacist involvement. The Combat Methamphetamine Epidemic Act of 2005 restricts retail sales of pseudoephedrine, ephedrine, and phenylpropanolamine to prevent illicit manufacturing. Under this federal law, retail over-the-counter sales of pseudoephedrine are limited to a maximum of 3.6 grams per purchaser per day, and a maximum of 9 grams per purchaser within a 30-day period.
To enforce these limits, purchasers of pseudoephedrine must present an identification document accepted under federal law and sign a written or electronic sales logbook; a government-issued photo ID is one accepted form of identification. Where permitted by state law and pharmacy policy, pharmacy technicians may retrieve behind-the-counter pseudoephedrine products, check purchaser identification, and record sales under pharmacist supervision. For example, when an adult presents photo identification to purchase pseudoephedrine nasal decongestant tablets, the technician verifies the credential, enters the transaction into the logbook to enforce the daily and 30-day quantity limits, and completes the sale under the direct oversight of the pharmacist.
Common mistakes
- Assuming dietary supplements require FDA safety and efficacy approval before marketing; under the Dietary Supplement Health and Education Act of 1994, supplements are regulated as food and do not require premarket FDA approval.
- Believing that oral phenylephrine is an effective decongestant; while pseudoephedrine and topical phenylephrine constrict blood vessels and relieve congestion, oral phenylephrine has not been shown effective for nasal congestion.
- Recommending an over-the-counter medication or herbal supplement to a customer; pharmacy technicians may help locate items on the retail floor, but product selection, clinical assessments, and counseling are strictly reserved for the pharmacist.
- Confusing the daily and monthly pseudoephedrine purchasing limits established by the Combat Methamphetamine Epidemic Act of 2005; the legal limits are 3.6 grams per purchaser per day and 9 grams per purchaser within a 30-day period.
Key points
- Prescription (legend) drugs require an authorized prescriber's order and carry the “Rx only” label, whereas OTC drugs may be marketed under an FDA OTC monograph or an approved drug application, and most carry standardized Drug Facts labeling.
- Retail pseudoephedrine sales are restricted by the Combat Methamphetamine Epidemic Act of 2005 to 3.6 grams per purchaser per day and 9 grams per purchaser in any 30-day period, and require an accepted identification document and logbook records.
- Acetaminophen reduces pain and fever without significant anti-inflammatory action but can cause hepatotoxicity, while NSAIDs reduce inflammation but carry gastrointestinal ulceration, bleeding, and renal toxicity warnings.
- Aspirin is contraindicated in children and adolescents recovering from viral infections due to Reye's syndrome risk.
- Under the Dietary Supplement Health and Education Act of 1994, dietary supplements are regulated as food, do not receive premarket FDA approval, and require specific disclaimers for structure/function claims.
- Oral calcium and iron supplements can chelate oral tetracyclines and fluoroquinolones, while herbal products like St. John's Wort induce cytochrome P450 enzymes and agents like ginkgo, garlic, and ginger elevate bleeding risks.
- Pharmacy technicians may locate nonprescription items and handle regulated sales tasks under pharmacist supervision, but must immediately refer all questions concerning counseling, product selection, and drug interactions to the pharmacist.
Practice this section
Explained ExCPT Drugs and Drug Therapy questions, no account needed. ExCPT Drugs and Drug Therapy practice test
The full lesson continues with 4 more sections with exam tips, audio in English and Spanish, 5 Check yourself questions and 20 flashcards.
- 1 month
$44.99$22.49 - 3 months
$131.99$65.99 - Lifetime
$269.99$134.99
One payment, no subscription.
See ExCPT plansAlready a member? Log in
Sample lesson: Top 200 Brand and Generic Names25 practice questions on this exam
Each ExCPT practice test has 25 original questions with the answers explained. No account needed.
Open the ExCPT practice testsOriginal lesson written for ExCPT practice · updated October 31, 2026. Exam names are trademarks of their owners; tests.global is not affiliated with them.