7.4 Pharmacology, Medications, Procedures, Labs & Imaging
Key Takeaways
- Route-of-administration abbreviations (PO, IV, IM, SubQ) and frequency abbreviations (BID, TID, PRN) must be interpreted exactly, never approximated.
- Milligrams (mg) and micrograms (mcg) differ by a factor of 1,000; unit confusion is a serious dosage error.
- 'Intoxicado' in Spanish means 'poisoned/sickened,' not 'drunk' — a false cognate linked to real diagnostic delays in emergency care.
- Imaging modalities (X-ray, CT, MRI, ultrasound) and tests like EKG have distinct purposes and must not be confused with similarly named procedures.
- Informed consent and discharge instructions require complete, faithful rendition of every element, not a summary.
Medication instructions are among the highest-risk content an interpreter handles, because dosage, route, and frequency errors can cause direct patient harm. This section covers the vocabulary interpreters must render with total precision, not just familiarity.
Drug Classes
Providers frequently refer to medications by their class rather than brand name, and interpreters benefit from recognizing common classes on sight: antibiotics (treat bacterial infection), antihypertensives (lower blood pressure, e.g., ACE inhibitors, beta-blockers), analgesics (relieve pain, ranging from over-the-counter options to opioids), anticoagulants ("blood thinners," reduce clotting risk), antidepressants, and insulin and other diabetes medications. Both prescription (Rx) and over-the-counter (OTC) medications come up routinely, and patients often need to be asked specifically about OTC use, supplements, and herbal remedies, since these can interact with prescribed drugs.
Routes of Administration
| Abbreviation | Meaning | Route |
|---|---|---|
| PO | Per os | By mouth (oral) |
| IV | Intravenous | Directly into a vein |
| IM | Intramuscular | Injected into a muscle |
| SubQ / SC | Subcutaneous | Injected under the skin (e.g., most insulin) |
| Sublingual | — | Under the tongue |
| Topical | — | Applied to the skin |
Route matters clinically, not just linguistically: a medication given IV acts far faster than the same medication given PO, and confusing routes in an interpreted instruction could lead a patient to attempt self-administration incorrectly at home.
Frequency and Dosage Precision
Frequency abbreviations appear constantly in discharge instructions and prescription counseling:
- BID — twice a day
- TID — three times a day
- QID — four times a day
- PRN — as needed
- HS — at bedtime
- AC / PC — before meals / after meals
An interpreter must never approximate these; "take it a few times a day" is not an acceptable rendering of "TID," because the patient needs the exact frequency to dose safely. The same precision applies to dosage units: mg (milligrams) and mcg (micrograms) differ by a factor of 1,000, and confusing them when interpreting a prescription is a serious, potentially dangerous error. Insulin is dosed in units, a measurement specific to insulin that must never be converted to milliliters or milligrams by the interpreter.
Medication adherence, whether a patient takes medication as prescribed, is a frequent counseling topic. Interpreters should render adherence questions and barriers (cost, side effects, forgetting doses, difficulty swallowing pills) exactly as discussed, since providers use this information to adjust regimens.
A Critical False Cognate: "Intoxicado"
One of the most consequential false cognates in emergency and toxicology settings is Spanish "intoxicado." In Spanish, this word means poisoned or sickened, for example, by spoiled food, a chemical exposure, or an adverse drug reaction, and does not mean "intoxicated" in the English sense of being drunk on alcohol. An interpreter who renders "estoy intoxicado" as "I am intoxicated [drunk]" can cause a care team to misclassify a poisoning or toxic exposure as alcohol intoxication, delaying appropriate treatment. This example is widely cited in interpreter training specifically because the mistranslation has been linked to real diagnostic delays, making it essential exam and practice knowledge.
A patient in the emergency department says, 'Estoy intoxicado' after eating food that may have been spoiled. What is the correct interpretation?
Beyond medications, interpreters regularly work through diagnostic testing, imaging orders, and the consent and discharge conversations that surround them. Precision with numbers, units, and terminology stays just as critical here as in the pharmacology content above.
Imaging Modalities
| Modality | What it does | Key note |
|---|---|---|
| X-ray | Uses radiation to image bone and dense tissue | Fastest, most common first-line imaging |
| CT (computed tomography) | Cross-sectional images using rotating X-rays | Often ordered "with" or "without contrast" (a dye); this distinction must be rendered exactly |
| MRI (magnetic resonance imaging) | Detailed soft-tissue images using magnetic fields, no radiation | Patients must be screened for metal implants/devices before scanning |
| Ultrasound | Uses sound waves; no radiation | Common in obstetrics and abdominal imaging |
The specialty that interprets imaging studies is radiology.
Common Procedures
- Biopsy — removal of a small tissue sample for lab analysis, most often to determine whether a growth is benign (non-cancerous) or malignant (cancerous); central to oncology diagnosis and staging, alongside terms like metastasis (cancer spread to another site), chemotherapy, and radiation therapy.
- Electrocardiogram (EKG/ECG) — records the heart's electrical activity, distinct from an echocardiogram (which uses ultrasound to image the heart's structure); these two similarly named tests must not be confused.
- Endoscopy / colonoscopy — a scope-based procedure to directly visualize the GI tract, used both diagnostically and to remove polyps.
Common Lab Panels
- CBC (complete blood count) — measures red blood cells, white blood cells, platelets, hemoglobin, and hematocrit; screens for anemia, infection, and clotting problems.
- BMP (basic metabolic panel) — measures electrolytes, glucose, and kidney function markers in one panel.
- Glucose and A1C/HbA1c — the single-reading and three-month-average blood sugar values discussed in the endocrine section of this chapter.
- Lipid panel — measures cholesterol (total, LDL, HDL) and triglycerides, used to assess cardiovascular risk.
Consent, Discharge Instructions, and Follow-Up
Two encounter types deserve special attention because they combine terminology accuracy with the interpreter's ethical duty of complete, faithful rendition:
- Informed consent — before most procedures, a provider must explain the procedure, its risks, benefits, and alternatives, and confirm the patient understands and agrees, in a process that legally depends on the patient receiving complete information in a language they understand. The interpreter must render every element of the consent discussion, not a summary, so the patient's agreement is genuinely informed.
- Discharge instructions and follow-up — instructions given at the end of a visit or hospital stay (medication changes, activity restrictions, warning signs that require returning to care, and the date/time of follow-up appointments) must be interpreted with the same numeric and terminology precision covered throughout this chapter, since these instructions are often the patient's only record of what to do next.
Because consent and discharge conversations frequently combine content from multiple body systems, medications, and procedures into a single fast-moving conversation, they are an efficient way for interpreters to review the full breadth of Chapter 7's terminology in a realistic, integrated context, exactly the skill the CHI bilingual performance exam's consecutive-interpreting dialogues are designed to test.
A prescription states a medication dose in micrograms (mcg), but the interpreter is unsure and considers rendering it in milligrams (mg) instead for the patient's convenience. What is the correct action?