Medical Assistant Exam Questions & Answers 2026 (21–30)

Question 1

Which drug classification BEST describes a medication that blocks H2 receptors on gastric parietal cells to reduce stomach acid production?

TheoryPractice · Accepted Answer

H2 receptor antagonist. H2 receptor antagonists (e.g., famotidine, ranitidine) competitively block histamine at H2 receptors on parietal cells, reducing acid secretion — they are mechanistically distinct from proton pump inhibitors, which block the final acid-pump step.

Question 2

When performing an intradermal injection for a tuberculin skin test, the needle should be inserted at which angle?

TheoryPractice · Accepted Answer

10 to 15 degrees. Intradermal injections are administered bevel-up at a 10–15 degree angle so the medication is deposited within the dermis, producing the characteristic raised wheal that indicates correct placement.

Question 3

A Schedule II controlled substance prescription has been filled. Under DEA regulations, which statement about refills is accurate?

TheoryPractice · Accepted Answer

It may not be refilled; a new prescription is required each time. DEA regulations classify Schedule II substances (e.g., oxycodone, methylphenidate) as having no refill authorization — each dispensing requires a new, separately written prescription.

Question 4

A medical assistant is reviewing a patient's medication list and notes the patient takes warfarin daily. Which drug classification, if added, most commonly requires INR monitoring adjustments due to its interaction with warfarin?

TheoryPractice · Accepted Answer

Fluoroquinolone antibiotics. Fluoroquinolones (e.g., ciprofloxacin) inhibit the CYP1A2 and CYP3A4 enzymes involved in warfarin metabolism, potentiating its anticoagulant effect and necessitating closer INR monitoring — a well-established drug–drug interaction.

Question 5

A patient is to receive 0.5 mg of atropine sulfate IM. The vial is labeled 0.4 mg/mL. How many milliliters should the medical assistant draw up?

TheoryPractice · Accepted Answer

1.25 mL. Desired ÷ Have × Volume = 0.5 mg ÷ 0.4 mg/mL = 1.25 mL — rounding is inappropriate for a cardiac-affecting drug, so the full calculated volume of 1.25 mL is correct.

Question 6

Which injection site is preferred for intramuscular injections in adults because it is free of major nerves and blood vessels and accessible in most patient positions?

TheoryPractice · Accepted Answer

Ventrogluteal. The ventrogluteal site is the preferred adult IM site per current clinical guidelines because the gluteus medius and minimus muscles at this location are distant from the sciatic nerve and superior gluteal artery, reducing injury risk.

Question 7

A medication is classified as a beta-blocker. Which physiological effect would the medical assistant expect this drug to produce?

TheoryPractice · Accepted Answer

Decreased heart rate and reduced myocardial contractility. Beta-adrenergic blockers antagonize beta-1 receptors in the heart, resulting in negative chronotropy (decreased heart rate) and negative inotropy (reduced contractility), which is why they are used in hypertension, angina, and heart failure.

Question 8

A medical assistant notices that a medication order reads 'metformin 500 mg PO BID with meals' but the patient reports skipping breakfast daily. Which action is MOST appropriate?

TheoryPractice · Accepted Answer

Clarify with the provider whether the dosing schedule should be adjusted for the patient's eating pattern. Metformin taken without food increases the risk of gastrointestinal side effects; the MA's scope requires consulting the provider rather than independently altering the prescribed schedule — this upholds both the 'right time' principle and scope-of-practice boundaries.

Question 9

Which drug schedule, as defined by the DEA, has the HIGHEST accepted medical use but also the highest potential for abuse and severe dependence among the scheduled categories?

TheoryPractice · Accepted Answer

Schedule II. Schedule II drugs (e.g., morphine, fentanyl, amphetamine) have a currently accepted medical use but carry the highest abuse potential among drugs that are legally prescribable — Schedule I drugs have no accepted medical use and therefore cannot be prescribed.

Question 10

A patient's chart notes 'subcutaneous injection administered.' Which anatomical layer was the injection delivered into?

TheoryPractice · Accepted Answer

The fatty tissue beneath the dermis. Subcutaneous (sub = below, cutaneous = skin) refers to the hypodermis, the fatty connective tissue layer just beneath the dermis, which is the target for insulin and certain vaccines.

Medical Assistant Exam Questions & Answers 2026 (21–30)

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