Strengths, Dosage Forms & Routes of Administration

1. A patient has difficulty swallowing tablets and asks the technician if their extended-release metoprolol succinate (Toprol-XL) can be crushed. What should the technician do?

Crushing an extended-release tablet destroys the delivery matrix that controls the drug's release over time, causing 'dose dumping' and a risk of toxicity from receiving the full extended-release dose immediately. Not all tablets are safe to crush, and doubling the dose would compound the danger rather than fix it.

2. How should a patient be counseled to take sublingual nitroglycerin tablets for chest pain?

Sublingual tablets are placed under the tongue and allowed to dissolve, which allows rapid absorption through the oral mucosa and bypasses first-pass liver metabolism for a fast onset. Chewing, swallowing whole, or dissolving in water would all delay or reduce absorption compared to the intended sublingual route.

3. A technician is counseling a patient starting a fentanyl transdermal patch. What administration instruction is most important to include?

Patches should be rotated to different sites and the old patch removed before a new one is applied, and patches should never be cut, as doing so can release the full reservoir of drug at once. Stacking patches or applying to unapproved sites both risk dangerous overdose.

4. Why should patients be counseled to rotate insulin injection sites within the same general body area, such as the abdomen?

Repeated injections into the same spot can cause lipohypertrophy (fatty tissue buildup), which leads to inconsistent and unpredictable insulin absorption from that site. Site rotation does not change refrigeration needs, does not speed up onset, and does not permanently prevent insulin resistance.

5. A technician is counseling a patient on correct use of a metered-dose inhaler (MDI) without a spacer. What should be included?

Proper MDI technique requires shaking the canister, exhaling fully first, then coordinating a slow, deep inhalation with actuation, followed by a breath-hold to allow the medication to deposit in the lungs. A fast, forceful inhalation reduces lung deposition, and most MDIs do require priming, especially before first use or after periods of non-use.

6. Amoxicillin oral suspension bottles are labeled 'shake well before using.' What is the reason for this instruction?

Suspensions are not fully dissolved, so drug particles settle to the bottom over time; shaking redistributes them evenly so each dose delivers the correct, consistent amount of medication. Shaking does not affect the drug's chemical activity, expiration, or serve a purely cosmetic role.

7. Where should an epinephrine auto-injector (EpiPen) be administered?

Epinephrine auto-injectors are designed for intramuscular injection into the outer mid-thigh (vastus lateralis) and can be given through clothing in an emergency to save time. The deltoid, abdomen, and buttock are not the approved injection sites for this device.

8. A patient calls saying their rectal suppository has become soft after sitting in a hot car. What should the technician recommend before it is used?

Suppository bases often soften at warm temperatures; briefly chilling the suppository in the refrigerator can firm it back up for easier, more comfortable insertion. Microwaving would further degrade it, and cutting off a portion would result in an inaccurate, unmeasured dose.

9. How should an effervescent tablet be administered to a patient?

Effervescent tablets are formulated to dissolve completely in water, releasing carbon dioxide gas, before the resulting solution is consumed. Swallowing the tablet whole can cause choking or gastric irritation from the gas reaction occurring in the stomach instead of a glass of water.

10. A prescription is written for buccal administration. Where should the patient be instructed to place the medication?

Buccal administration means placing the medication in the pocket between the cheek and gum, where it is absorbed through the oral mucosa. This is distinct from sublingual administration, which is placed under the tongue instead.

1. Which of the following medications is typically administered via subcutaneous injection rather than intramuscular injection?

Insulin is injected into the subcutaneous fatty tissue for slower, steadier absorption. Most routine adult vaccines (e.g., inactivated influenza, Tdap) and testosterone cypionate are given intramuscularly, and injectable ceftriaxone for severe infections is also commonly given IM or IV, not subcutaneously.

2. Why should insulin pens never be shared between patients, even if a new needle is attached each time?

Even with a fresh needle, blood or tissue can be drawn back into the pen's cartridge during injection, creating a real risk of transmitting bloodborne pathogens between patients if the pen device itself is shared. This is a contamination risk, not an insurance rule, and it applies to pens just as it can apply to shared vials used improperly.

3. A patient who has difficulty swallowing capsules is prescribed omeprazole delayed-release capsules. What administration option can the pharmacist consider?

The capsule can be opened and the intact enteric-coated pellets sprinkled on soft food like applesauce, as long as the pellets themselves are not chewed or crushed, which would destroy the coating that protects the drug from stomach acid. Hot water and dose doubling are not appropriate administration methods.

4. A technician counsels a patient on a new fluticasone nasal spray. Before the first use, what should the patient do?

Nasal spray pumps typically need to be primed before first use, and again after periods of non-use, to ensure a consistent, accurate dose reaches the nasal passages. Skipping priming can result in an inconsistent first dose; the spray is not meant to be swallowed or refrigerated.

5. A patient is prescribed two different eye drop medications to be used at the same time of day. How should the technician advise spacing the two drops?

Waiting at least about 5 minutes between different eye drops prevents the second drop from washing out or diluting the first before it can be absorbed. Instilling them simultaneously would reduce the effectiveness of both, and a 24-hour wait or skipping a prescription is unnecessary and could undertreat the patient.

6. Can an otic (ear) suspension be substituted for an ophthalmic (eye) solution if the eye drops are temporarily out of stock?

Otic and ophthalmic products are formulated differently in terms of pH, preservatives, and sterility standards for their intended site of use, so an otic product should not be substituted into the eye. This is a general rule that is not limited to or expanded for pediatric patients.

7. A patient asks if they can stop taking their amoxicillin once their sore throat symptoms resolve after 3 days, even though a 10-day course was prescribed. What should the technician tell them?

Completing the full prescribed antibiotic course helps ensure the infection is fully eradicated and reduces the risk of relapse and antibiotic resistance, even after symptoms improve. Stopping early, skipping days, or saving doses for later can all lead to incomplete treatment and resistant bacteria.

8. Why is it especially dangerous to crush or chew extended-release oxycodone tablets?

Crushing or chewing an extended-release opioid tablet destroys the mechanism that releases the drug gradually, causing 'dose dumping' of the entire dose immediately and creating a serious risk of overdose and fatal respiratory depression. This does not simply affect taste or destroy the drug's effect.

9. A patient using testosterone topical gel should be counseled to take which precaution regarding application?

Testosterone gel can transfer to another person through skin contact before it dries, which can cause unwanted hormonal effects (such as virilization) in women or children who are exposed. Applying to broken skin, showering right after application, or sharing applicators would all increase risk rather than reduce it.

10. When a patient is instructed to draw up a mixed dose of regular (clear) and NPH (cloudy) insulin into the same syringe, what is the correct technique?

The 'clear before cloudy' rule prevents contaminating the fast-acting clear insulin vial with the intermediate-acting cloudy NPH suspension, which could alter its onset of action. Mixing in a separate container is not standard technique, and the order should not depend on which dose is larger.

1. A parent asks the technician what they should use to measure a dose of liquid acetaminophen for their child. What should the technician recommend?

Household spoons vary significantly in actual volume and are not reliable for accurate dosing; the calibrated oral syringe or dosing cup that comes with the product ensures the correct, consistent dose. A tablespoon or an eyeballed pour both risk significant over- or under-dosing.

2. A patient is prescribed a long-acting injectable (depot) antipsychotic such as paliperidone palmitate. What is a key administration consideration the technician should be aware of when processing this prescription?

Depot antipsychotics are given intramuscularly by a healthcare professional at extended, fixed intervals (such as every 4 weeks), which is very different from daily oral tablet dosing and is not intended for patient self-administration at home. Depot and oral formulations also are not simply interchangeable at equivalent doses.