Pharmacology & Medication Administration

1. A physician orders 500 mg of amoxicillin PO for a patient. The medication is available as an oral suspension of 250 mg/5 mL. How many milliliters should the medical assistant administer?

Using the formula (Desired/Have) x Quantity: (500 mg / 250 mg) x 5 mL = 10 mL. The other options represent incorrect calculations that would result in underdosing or overdosing the patient.

2. Which of the following is considered one of the 'rights' of medication administration?

Right documentation is one of the recognized rights of medication administration, along with right patient, drug, dose, route, time, and reason. Pharmacy, insurance, and refill are not part of the medication administration rights.

3. A medical assistant is administering an intramuscular injection using the Z-track method. What is the primary purpose of this technique?

The Z-track method involves pulling the skin laterally before injection to seal the medication in the muscle and prevent it from leaking into subcutaneous tissue, which can cause irritation or staining. It is particularly important for medications like iron dextran. It does not primarily reduce pain, speed absorption, or avoid nerves.

4. Which needle gauge and length would be most appropriate for administering an intradermal tuberculin skin test to an adult?

Intradermal injections require a very small gauge (25-27) and short needle (⅜-⅝ inch) inserted at a 5-15 degree angle to deposit medication just under the skin. Larger gauges and longer needles are used for IM or SQ injections and would penetrate too deeply for an intradermal injection.

5. A medical assistant realizes she administered the wrong dose of a medication to a patient. What is the FIRST action she should take?

Patient safety is the priority; the physician must be notified immediately so the patient can be assessed and treated if needed. Documentation and incident reports follow after the patient is stabilized. Informing the patient is important but occurs after clinical assessment and physician notification.

6. Which vaccine must be stored in a freezer at temperatures between -50°C and -15°C (-58°F and +5°F) according to CDC guidelines?

The varicella vaccine and MMRV must be stored frozen. Influenza, hepatitis B, and Tdap vaccines are stored refrigerated at 2°C to 8°C (36°F to 46°F). Improper storage can inactivate vaccines.

7. A patient is prescribed nitroglycerin sublingually for chest pain. Which instruction is correct?

Sublingual medications are placed under the tongue to dissolve, allowing rapid absorption through mucous membranes into the bloodstream. Chewing or swallowing would subject the drug to first-pass metabolism, reducing effectiveness. Placement between cheek and gum is the buccal route.

8. According to CDC guidelines, at what age is the first dose of the MMR (measles, mumps, rubella) vaccine recommended for children?

The CDC recommends the first dose of MMR at 12-15 months of age, with a second dose at 4-6 years. Giving it earlier is less effective due to maternal antibody interference. Hepatitis B is given at birth; DTaP begins at 2 months.

9. A medical assistant is administering an insulin injection subcutaneously. What is the correct angle of insertion for most adults using a standard SQ needle?

Subcutaneous injections are given at 45 or 90 degrees depending on needle length and patient body habitus. Intradermal injections use 5-15 degrees. IM injections use 90 degrees but require longer needles.

10. A Vaccine Information Statement (VIS) must be provided to a patient or guardian:

Federal law requires that a current VIS be provided before each dose of a covered vaccine to the patient, parent, or legal representative, regardless of age or dose number. This applies to both children and adults receiving covered vaccines.

1. Which class of medication is used to treat hypertension by blocking beta-adrenergic receptors?

Beta blockers (such as metoprolol and atenolol) block beta-adrenergic receptors, reducing heart rate and blood pressure. ACE inhibitors block angiotensin conversion, calcium channel blockers block calcium influx, and diuretics reduce fluid volume—all different mechanisms.

2. The ventrogluteal site is the preferred IM injection site for adults because it:

The ventrogluteal site is preferred because it is free of major nerves and blood vessels, making it the safest IM injection site. The dorsogluteal site risks the sciatic nerve. Maximum IM volume is typically 3 mL, not 10 mL.

3. A patient reports developing hives, itching, and difficulty breathing shortly after receiving an antibiotic injection. This reaction is most likely:

Hives, itching, and respiratory distress after medication administration are classic signs of anaphylaxis, a severe allergic reaction requiring immediate intervention with epinephrine. Side effects and therapeutic effects would not include these symptoms; a drug interaction requires more than one medication.

4. When instilling ear drops in an adult patient, the medical assistant should pull the pinna:

In adults, the pinna is pulled up and back to straighten the ear canal for proper medication instillation. In children under 3, the pinna is pulled down and back due to anatomical differences in the ear canal.

5. VAERS (Vaccine Adverse Event Reporting System) reports should be submitted:

VAERS accepts reports of any clinically significant adverse event following vaccination, regardless of whether causation is established. Reports can be submitted by healthcare providers, patients, or manufacturers, and are not limited to deaths or a 24-hour window.

6. A physician orders 0.25 mg of digoxin. The medication is available in tablets containing 0.125 mg. How many tablets should be administered?

Using the formula (Desired/Have): 0.25 mg / 0.125 mg = 2 tablets. Giving ½ or 1 tablet would underdose the patient; 4 tablets would result in a dangerous overdose.

7. Which of the following is a contraindication for administering the live attenuated influenza vaccine (LAIV, nasal spray)?

LAIV is contraindicated in pregnancy because it contains live virus. It is also not recommended for adults over 50, immunocompromised patients, and children under 2. Mild URI and mild egg allergy are not contraindications for most flu vaccines.

8. Which controlled substance schedule includes drugs with a high potential for abuse and NO accepted medical use in the United States?

Schedule I substances (such as heroin and LSD) have a high potential for abuse and no accepted medical use. Schedule II drugs have high abuse potential but accepted medical uses (e.g., morphine). Schedules III-V have progressively lower abuse potential.

9. When applying a transdermal medication patch, the medical assistant should:

Transdermal patches should be applied to clean, dry, hairless, intact skin, and gloves prevent the medication from absorbing into the medical assistant's skin. Sites should be rotated to prevent irritation. Patches should never be cut, as this alters dose delivery, and they should not be placed on scars or broken skin.

10. A medical assistant is documenting an administered medication. Which entry is MOST complete and correct?

Proper medication documentation must include date, time, drug name, dose, route, site, patient response, and the signature/credentials of the person administering. The other entries omit critical elements such as dose, route, site, or credentials, making them incomplete and legally inadequate.

1. A physician orders 500 mg of amoxicillin for a patient. The medication is available in 250 mg/5 mL suspension. How many mL should the medical assistant administer?

Using the formula (Desired dose / Available dose) × Volume: (500 mg / 250 mg) × 5 mL = 10 mL. The other options result from incorrect setup of the dosage calculation formula.

2. Which of the following is NOT one of the traditional 'rights' of medication administration?

The traditional rights of medication administration include right patient, right drug, right dose, right route, right time, and right documentation. Cost is not one of the rights of medication administration.

3. A medical assistant is administering an intramuscular injection to an adult using the ventrogluteal site. Which needle length is most appropriate for an average-weight adult?

An IM injection in an average-weight adult typically requires a 1 to 1½ inch needle to reach muscle tissue. A 3/8 inch needle is used for intradermal injections, 5/8 inch for subcutaneous, and 2½ inches is too long for standard IM administration.

4. Which injection technique is used to prevent medication from leaking back into subcutaneous tissue and staining the skin, commonly used for iron dextran?

The Z-track method involves pulling the skin laterally before injection to create a zigzag path, sealing the medication in the muscle. This prevents irritating medications like iron dextran from tracking back into subcutaneous tissue. The other techniques are not standard methods for this purpose.

5. According to CDC guidelines, at what temperature range should refrigerated vaccines be stored?

The CDC requires refrigerated vaccines to be stored between 2°C and 8°C (36°F to 46°F). Frozen vaccines like varicella are stored between -50°C and -15°C. Room temperature is inappropriate for vaccine storage.

6. A patient reports hives and difficulty breathing 10 minutes after receiving an injection of penicillin. This reaction is BEST classified as:

Hives and difficulty breathing shortly after medication administration indicate anaphylaxis, a severe allergic reaction. Side effects are predictable, mild reactions; idiosyncratic reactions are unusual, unexpected responses; a therapeutic effect is the desired outcome.

7. Which needle gauge and length is most appropriate for an intradermal PPD (tuberculin) test?

Intradermal injections such as PPD tests require a small gauge (26-27) and short needle (3/8 to 1/2 inch) inserted at a 5-15 degree angle. Larger gauges and longer needles would penetrate too deeply beyond the intradermal layer.

8. Federal law requires that a Vaccine Information Statement (VIS) be provided to the patient or parent/guardian:

The National Childhood Vaccine Injury Act requires that a current VIS be provided before EACH dose of a covered vaccine is administered, not just upon request or only for the first dose. This ensures patients receive current information each time.

9. A medical assistant discovers a medication error was made 30 minutes ago. What is the FIRST action to take?

The first priority when a medication error occurs is patient safety—the provider must be notified immediately and the patient assessed for adverse effects. Documentation and incident reports follow after the patient has been assessed and any needed interventions initiated.

10. Which class of medications is used to lower blood pressure by blocking the effects of the sympathetic nervous system on the heart?

Beta blockers (e.g., metoprolol, atenolol) block beta-adrenergic receptors, reducing heart rate and blood pressure. Diuretics lower blood pressure by reducing fluid volume, antihistamines treat allergies, and bronchodilators open airways.

1. When administering an insulin subcutaneous injection, what angle should the needle be inserted at for an average-weight adult using a 5/8 inch needle?

Subcutaneous injections are typically administered at a 45 to 90 degree angle depending on needle length and patient body composition. Intradermal injections use 10-15 degrees, and IM injections use 90 degrees with longer needles.

2. A provider orders 0.25 mg of digoxin. The available tablets are 0.125 mg. How many tablets should be administered?

0.25 mg ÷ 0.125 mg = 2 tablets. Using the dosage formula (Desired/Available) × Quantity confirms 2 tablets are needed to deliver the ordered dose.

3. Adverse events following vaccination should be reported to which of the following systems?

The Vaccine Adverse Event Reporting System (VAERS) is the national program for reporting adverse events following vaccination. OSHA regulates workplace safety, CLIA governs laboratory testing, and HIPAA addresses patient privacy.

4. Which route of medication administration provides the FASTEST absorption?

Intravenous administration delivers medication directly into the bloodstream, providing immediate absorption and onset. Oral medications must be digested and absorbed, subcutaneous is slower due to less vascular tissue, and transdermal is the slowest route for systemic effect.

5. When instilling eye drops, the medical assistant should place the drops in the:

Eye drops should be placed in the lower conjunctival sac by gently pulling down the lower eyelid. Placing drops directly on the cornea causes blinking and discomfort, and the inner canthus and upper eyelid are not proper administration sites.

6. Convert 2 tablespoons to milliliters.

One tablespoon equals 15 mL, so 2 tablespoons equal 30 mL. One teaspoon equals 5 mL, and 60 mL equals 2 fluid ounces or 4 tablespoons.

7. Which of the following vaccines is contraindicated during pregnancy?

MMR is a live attenuated vaccine and is contraindicated during pregnancy due to theoretical risk to the fetus. Tdap is actually recommended during pregnancy, inactivated influenza is safe and recommended, and Hepatitis B may be given during pregnancy when indicated.

8. The preferred intramuscular injection site for infants under 12 months of age is the:

The vastus lateralis (anterolateral thigh) is the recommended IM injection site for infants because it is a well-developed muscle with no major nerves or blood vessels. The deltoid is too small in infants, and the gluteal sites are not developed enough for safe injection.

9. Nitroglycerin tablets prescribed for angina are administered by which route?

Nitroglycerin tablets for acute angina are administered sublingually (under the tongue), where they are rapidly absorbed through the mucous membranes into the bloodstream. Nitroglycerin can also come in transdermal patches, but tablets are given sublingually.

10. Which of the following is a proper documentation entry for administering an injection?

Proper vaccine documentation must include date, time, vaccine name, dose, route, site, lot number, expiration date, VIS date/provision, and signature/credentials of the administrator. The other entries lack critical required information for legal and safety compliance.

1. A physician orders 500 mg of amoxicillin PO. The medication is available in a suspension of 250 mg/5 mL. How many milliliters should the medical assistant administer?

Using the formula (Desired dose ÷ Dose on hand) × Volume: (500 mg ÷ 250 mg) × 5 mL = 10 mL. 5 mL would only deliver 250 mg, 15 mL would deliver 750 mg, and 20 mL would deliver 1,000 mg.

2. A medical assistant is preparing to give an intramuscular injection of penicillin to an adult patient using the ventrogluteal site. Which needle length and gauge are most appropriate?

IM injections in an average adult require a 1 to 1.5 inch needle with a gauge of 20-23 to reach muscle tissue and to accommodate thicker medications like penicillin. Shorter, higher-gauge needles (25, 27, 30) are used for subcutaneous or intradermal injections and would not reach muscle tissue.

3. Which of the following is a required action under federal law before administering any vaccine covered by the National Childhood Vaccine Injury Act?

Federal law requires that healthcare providers give patients or their guardians the current CDC Vaccine Information Statement (VIS) before administering covered vaccines. VAERS reporting is only required for adverse events, not routine administrations. Insurance consent and TB testing are not required prior to vaccination.

4. A medical assistant accidentally administers 50 mg of a medication instead of the ordered 25 mg. What is the FIRST action the medical assistant should take?

When a medication error occurs, the medical assistant must immediately notify the supervising provider so the patient can be assessed and any necessary interventions initiated. Documentation and incident reports are required, but patient safety comes first. Waiting for symptoms could result in serious harm.

5. The Z-track injection technique is used primarily to:

The Z-track technique involves pulling the skin laterally before IM injection, creating a zigzag path when released, which seals the medication in the muscle and prevents leakage into subcutaneous tissue. This is especially important for irritating or staining medications such as iron dextran. It is not used for SC, insulin, or intradermal injections.

6. According to CDC guidelines, refrigerated vaccines should be stored at what temperature range?

The CDC recommends that refrigerated vaccines be stored between 2°C and 8°C (36°F to 46°F). The -15°C to -50°C range is for frozen vaccines like varicella and MMRV. Storing vaccines at warmer temperatures compromises their potency and effectiveness.

7. A patient is prescribed nitroglycerin sublingual tablets for angina. The medical assistant should instruct the patient to:

Sublingual medications are placed under the tongue and allowed to dissolve, allowing rapid absorption through the highly vascular mucous membranes. Chewing, crushing, or swallowing bypasses the sublingual route and delays absorption, which is critical during an angina episode. Nitroglycerin is not applied topically as a tablet (though a paste/patch form exists).

8. Which of the following best describes the 'six rights' of medication administration?

The six rights of medication administration are: right patient, right drug, right dose, right route, right time, and right documentation. These safety checks must be verified before administering any medication to prevent errors. The other options describe unrelated concepts or procedural details.

9. A medical assistant is administering a Mantoux tuberculin skin test. Which of the following techniques is correct?

The Mantoux test is an intradermal injection of 0.1 mL of PPD, given at a 5-15 degree angle just beneath the epidermis on the inner forearm, producing a visible wheal. IM injection (deltoid, 90°) and SC injection (abdomen, 45°) would deliver the medication too deeply and invalidate the test. TB testing is not a topical procedure.

10. A patient reports that after taking a newly prescribed antibiotic, they developed hives, facial swelling, and difficulty breathing. This reaction is BEST classified as:

Hives, facial swelling (angioedema), and respiratory difficulty are hallmark signs of anaphylaxis, a severe and potentially life-threatening allergic reaction that requires immediate emergency treatment, typically with epinephrine. These symptoms are not typical side effects, food interactions, or therapeutic responses, and delaying treatment could be fatal.