Clinical Skills · Medication Administration Procedures
Administering Oral Medications
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Oral medication administration — giving a medication by mouth to be swallowed — is the most common route for giving medications in hospitals, long-term care, and at home. The abbreviation PO (from the Latin per os, "by mouth") appears on orders and the medication administration record (MAR). The route includes tablets, capsules, liquids, powders mixed with liquids, and medications placed in the mouth but not swallowed right away, such as Sublingual Placed under the tongue to dissolve Full entry → (under the tongue) and Buccal Placed between the cheek and gum to dissolve Full entry → (between the cheek and gum) forms.
Once a medication is swallowed, it travels down the esophagus into the stomach and small intestine, where most absorption occurs. From there it enters the bloodstream and passes through the liver before reaching the rest of the body — a journey called First-pass metabolism The liver processes a swallowed drug before it reaches general circulation Full entry →, which partially reduces how much of the drug reaches the general circulation. This explains why oral doses often differ from doses given by other routes, and why some medications are formulated to dissolve under the tongue, where absorption can bypass the liver's first pass.
Administering an oral medication is far more than "handing the patient a cup." The nurse verifies the order, checks the patient's identity and allergies, selects the correct form of the drug, prepares the dose accurately (including measuring liquids correctly), positions the patient safely, and confirms the medication was actually swallowed. Each of those steps is a chance to catch an error before it reaches the patient.
Why this matters
Oral medications make up a large share of every medication pass, so competence here is a daily safety skill. Medication errors — the wrong drug, dose, patient, route, or time — are a leading preventable harm in health care, and the rights of medication administration exist to catch them. For exams, the oral route is the baseline from which every other route (parenteral, topical, inhaled) is compared. Clinically, a nurse who understands dosage forms knows why an extended-release tablet must never be crushed, why a sublingual tablet must not be swallowed, and why a patient who has difficulty swallowing needs a plan rather than a hurried push. Patient education about "how and when to take it" also lives here: adherence improves when people understand their medications, and side effects are caught earlier when patients know what to report.
The college version
Core Concepts
The Rights of Medication Administration
Before any drug reaches a patient, the nurse checks the rights. The classic set is: right patient, right medication, right dose, right route, and right time. Most institutions add expanded rights: right documentation, right indication (why it is being given), right to refuse, and right response (evaluating whether the drug worked). The right patient check uses at least two identifiers, such as name and date of birth or a facility-issued identification band — never a room number. The rights are not a checklist to recite; they are a reasoning framework. If the order says one dose and the label says another, the nurse stops and investigates rather than guessing which is correct.
Verifying the Order and the Three Checks
Oral medication orders may be routine (given on a schedule), one-time, or PRN (as needed). The nurse reads the order on the MAR or electronic MAR (eMAR), confirms it is current, and checks for allergies before preparing anything. The three checks structure the workflow: check the medication against the order when it is removed from storage, again while preparing the dose, and a third time at the bedside before administration. This repetition is intentional — each check is an independent chance to catch a mismatch.
Dosage Forms and Why Form Matters
- Tablets and capsules are the most common. A scored tablet has a groove for splitting; unscored tablets should not be split because the dose may not be even. Capsules must not be opened unless explicitly ordered and verified.
- Enteric-coated A special coating that protects the tablet from stomach acid Full entry → tablets have a coating that protects the drug from stomach acid or protects the stomach from the drug. They must be swallowed whole — never crushed or chewed.
- Extended-release (ER), sustained-release (SR), or long-acting formulations release the drug slowly. Crushing them can dump the full dose at once, causing a dangerous effect. "Never crush" is the default unless pharmacy confirms it is safe.
- Sublingual and buccal forms dissolve in the mouth and are absorbed directly into the bloodstream. They must not be chewed or swallowed whole, or the drug won't work as intended.
- Liquids (suspensions, solutions, elixirs) should be measured in a calibrated cup or oral syringe at eye level, reading the bottom of the meniscus (the curved surface of the liquid). Suspensions are shaken before pouring. Oral syringes are marked "oral only" because they are not compatible with IV tubing — a classic safety distinction.
Technique and Patient Positioning
The nurse performs hand hygiene, gathers supplies, and verifies the rights. The patient should be sitting upright (or as upright as their condition allows) with the head of the bed elevated, because swallowing is safest in this position and aspiration risk increases when a person is lying flat. Offer water (unless fluid-restricted), give the medication, and stay until the patient has actually swallowed it — for liquids, this may mean watching them drink; for tablets, ask the patient to open their mouth if swallowing is uncertain. For sublingual medications, instruct the patient to keep the tablet under the tongue until dissolved and to avoid eating, drinking, or smoking while it dissolves. For patients who have dysphagia (difficulty swallowing), the nurse checks whether a liquid or crushable alternative exists; the order and pharmacy guidance decide that, never the nurse's assumption. Some medications given via feeding tube require crushing, but many do not — each drug must be verified individually.
Documentation, Evaluation, and Teaching
After administration, the nurse documents the drug, dose, route, time, and patient response, and records refusal if the patient declined. Evaluation ("right response") means checking whether the expected effect occurred — for example, asking whether pain improved after a PRN analgesic. Teaching covers the medication's purpose, when to take it, what to do after a missed dose, and which side effects to report. Documentation is also a legal record: if it wasn't documented, it didn't happen.
Common Confusions
| Do Not Confuse | With | Difference |
|---|---|---|
| PO (oral) | Parenteral routes | PO goes through the GI tract; parenteral (injected, IV) bypasses it — different absorption and risk profile |
| Sublingual | Buccal | Sublingual is under the tongue; buccal is between cheek and gum — same concept, different location |
| Enteric-coated | Extended-release | Enteric coating protects from stomach acid; ER controls how fast the drug is released — both mean "don't crush" but for different reasons |
| Right patient = room number | Right patient = two identifiers | Room numbers move and mislead; identity checks use name, date of birth, or ID band per policy |
| "It looked fine" | Verified medication | Package intact and unexpired is necessary but not sufficient — the drug must match the order, patient, dose, and route |
| Watching the cup leave the room | Watching the patient swallow | Medication cups can be held in the mouth or set aside; confirmation of swallowing is part of safe administration |
Eli explains
The same idea, in plain words
Explain it like I’m 10
Giving medicine by mouth is like making sure the right person eats the right food. You check the name on the cup, check that it's the right food, and watch the person actually eat it. Some medicines are special: a pill with a coat must be swallowed whole (like a candy with a shell), and a tablet that goes under the tongue must melt there — not be chewed. You also sit the person up so the medicine goes down the right pipe.
Worked example
Consider a patient who had a stroke and is now recovering on a medical unit. The nurse reviews the eMAR and sees a routine oral medication order plus a PRN medication for discomfort. The first check happens at the medication cart: the nurse removes the tablet package and compares the label with the order — drug name, strength, dose, and form. The second check happens while placing the tablet in a medication cup: same comparison, plus a glance at the expiration date and package integrity. At the bedside, the nurse performs the third check and identifies the patient using two identifiers ("What is your name?" and the ID band date of birth), asks about allergies, and notes that the patient has been having trouble swallowing since the stroke. Because the ordered tablet is an extended-release form that must not be crushed, the nurse does not improvise. The nurse holds the dose, pages the provider, and asks whether a liquid alternative is appropriate — the order and pharmacy will decide. Meanwhile, the PRN medication is a liquid, which the patient can manage: the nurse pours it into an oral syringe, measures at eye level at the bottom of the meniscus, elevates the head of the bed, and watches the patient swallow every drop before documenting. This scenario shows the real job: the rights and three checks are not paperwork, they are the reasoning that protects a vulnerable patient.
Key takeaways
- PO = by mouth, the most common route; absorption happens mainly in the small intestine, and the liver processes the drug first (first-pass metabolism).
- The rights (patient, drug, dose, route, time + expanded rights) are the safety framework for every administration; two identifiers, never a room number.
- Three checks happen at removal, during preparation, and at the bedside — each one can catch an error.
- Form dictates handling: enteric-coated and extended-release forms are never crushed; sublingual and buccal forms are not swallowed; scored tablets are the only tablets meant to be split.
- Measure liquids at eye level at the bottom of the meniscus; use oral syringes only for oral doses.
- Position upright to reduce aspiration risk, and watch the patient swallow — don't assume.
- Swallowing difficulty is a safety flag: verify crushable/liquid alternatives with the order and pharmacy rather than improvising.
Check yourself
6 review questions from the chapter. Try each one, then open the answer.
What are the five classic rights of medication administration, and why do expanded rights matter?
Show answer
Right patient, right medication, right dose, right route, right time. Expanded rights (right documentation, indication, to refuse, and response) push the nurse to evaluate whether the medication was appropriate and effective, not just delivered.
Why must enteric-coated and extended-release tablets never be crushed?
Show answer
Crushing destroys the protective coating (enteric) or the slow-release mechanism (ER/SR), which can expose the stomach to an irritating drug or release a full dose at once — both potentially harmful.
Where is a sublingual tablet placed, and what must the patient avoid while it dissolves?
Show answer
Under the tongue, where it dissolves. The patient should avoid chewing or swallowing it, and typically avoid eating, drinking, or smoking while it dissolves so absorption is not disrupted.
How should a nurse measure a liquid medication, and why is eye level important?
Show answer
In a calibrated cup or oral syringe at eye level, reading the bottom of the meniscus. Eye level prevents parallax error, which makes the dose look larger or smaller than it actually is.
A patient who has difficulty swallowing is ordered a tablet you are not sure about. What should you do, and why shouldn't you crush it on your own?
Show answer
Stop and verify with the order and pharmacy whether a liquid or crushable form is appropriate — never crush on your own. Crushing an unsuitable form (e.g., extended-release) can change the drug's action and harm the patient.
What is first-pass metabolism, and how does it explain sublingual dosing?
Show answer
A swallowed drug is partially broken down by the liver before reaching the general circulation. Sublingual absorption bypasses that first pass, so the drug reaches the bloodstream faster and more completely — which is why some drugs are dosed that way.
Study tools & related lessonsKey vocabulary · Related
Key vocabulary
- PO (per os)
- "By mouth" — medication meant to be swallowed
- Sublingual
- Placed under the tongue to dissolve
- Buccal
- Placed between the cheek and gum to dissolve
- Enteric-coated
- A special coating that protects the tablet from stomach acid
- Extended-release (ER/SR)
- Formulated to release the drug slowly over time
- MAR / eMAR
- Medication administration record — the legal list of ordered and given medications
- First-pass metabolism
- The liver processes a swallowed drug before it reaches general circulation
- Rights of administration
- The safety checks (patient, drug, dose, route, time, and more)
Sources & references
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