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ExCPT · Drugs and Drug Therapy · 6 min read

Cardiovascular, Diabetes and Respiratory Medicines

In this lesson you will
  • Identify common cardiovascular drug classes, their naming conventions, characteristic adverse effects, and critical dispensing precautions.
  • Distinguish between various insulin formulations and oral antidiabetic agents, including their mechanisms, storage rules, and risks.
  • Differentiate respiratory medications and antihistamines while maintaining clear boundaries regarding the technician's scope of practice under pharmacist supervision.

The Pharmacy Technician's Role and Scope

In the pharmacy setting, pharmacy technicians play a crucial role by preparing prescriptions for dispensing under direct pharmacist supervision. This includes tasks such as entering prescription details, selecting the correct drug products, counting tablets or preparing medications, and affixing appropriate prescription labels. Precision and attention to detail during each step help prevent medication errors before the prescription moves forward in the workflow.

While technicians handle the physical and technical assembly of orders, clinical evaluation of drug therapy, patient counseling, and final prescription verification must be performed by a pharmacist. Whenever a patient asks questions about side effects, how to use a specific inhalation device, or what foods to avoid, the technician must promptly refer the patient to the pharmacist. Recognizing this distinction ensures safe patient care and strict legal compliance.

Exam tip. On the ExCPT, questions often ask who is responsible for explaining drug interactions, counseling on complex inhalers, or verifying orders. Remember that clinical assessment, patient counseling, and final checks always belong solely to the pharmacist; the technician's role is preparation under supervision.

Common mistakes

  • Swallowing tiotropium HandiHaler capsules whole instead of placing them into the inhalation device to be pierced and inhaled.
  • Do not repackage dabigatran capsules into standard amber vials or pill organizers; keep them in the original manufacturer bottle or blister package to protect them from moisture.
  • Assuming metformin monotherapy carries a high risk of hypoglycemia, when in reality hypoglycemia is a significant risk with sulfonylureas (glipizide, glimepiride, glyburide).
  • Failing to direct a patient to the pharmacist when they ask how to use an inhaler, what to do about statin muscle pain, or how to manage green vegetable intake on warfarin.

Key points

  • Pharmacy technicians prepare medications under pharmacist supervision, while clinical evaluations, patient counseling, and final prescription verification are reserved for pharmacists.
  • ACE inhibitors (-pril) can cause a dry cough, while both ACE inhibitors and ARBs (-sartan) cause hyperkalemia and are contraindicated in pregnancy.
  • Loop diuretics (furosemide) can cause hypokalemia, whereas potassium-sparing diuretics cause hyperkalemia; metoprolol succinate is once daily while tartrate is twice daily.
  • Statins (-statin) carry a risk of muscle pain (myopathy/rhabdomyolysis) and interact with CYP3A4 inhibitors like grapefruit juice (simvastatin, atorvastatin); dabigatran must be kept in its original packaging.
  • Warfarin requires regular INR monitoring and consistent dietary vitamin K intake; life-threatening warfarin-associated bleeding is generally treated with four-factor prothrombin complex concentrate plus intravenous vitamin K.
  • Unopened insulin is refrigerated between 36°F and 46°F (2°C to 8°C); regular insulin can be given IV, NPH is cloudy and rolled, and standard strength is U-100 (100 units/mL).
  • Inhaled corticosteroids require mouth rinsing to prevent oral thrush, tiotropium capsules must never be swallowed, and pseudoephedrine sales are federally tracked and limited.

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Original lesson written for ExCPT practice · updated October 31, 2026. Exam names are trademarks of their owners; tests.global is not affiliated with them.