CANRA Part 2 · Case reasoning

Clinical Cases and Model Reasoning

Read the presentation, decide the first safe step, and expand the model answer. Each example tests clinical judgment before selecting a plant or formula.

Study guideStudy the 300-question bank

12 guided clinical scenarios

Case 01: Suspected acute urinary infection

Presentation: Dysuria with fever, flank pain and vomiting. The patient asks for uva-ursi instead of antibiotics.

Your task: What is the safest next action, and which information would change your plan?

Model reasoning: Assess urgent complicated UTI/pyelonephritis, vital signs and need for medical treatment. Avoid replacing indicated care with botanicals.

Source: Uploaded UTI cases, safety-first adaptation.

Case 02: Kidney stone and possible obstruction

Presentation: Severe unilateral flank pain, fever and reduced urine output. The student suggests a diuretic tea.

Your task: What is the safest next action, and which information would change your plan?

Model reasoning: Fever and obstruction concern require urgent assessment. No herbal regimen should delay emergency evaluation.

Source: Uploaded Kidney Stones case material; disposition updated.

Case 03: Potential herb-drug interaction

Presentation: A patient taking oral contraceptives asks for St. John’s wort to improve mood.

Your task: What is the safest next action, and which information would change your plan?

Model reasoning: Review depression assessment and medication; St. John’s wort can lower contraceptive concentrations and interact with antidepressants.

Source: NCCIH St. John’s Wort 2026-sourced safety.

Case 04: Hypertension and licorice

Presentation: Patient with high blood pressure and potassium-lowering diuretic wants daily strong licorice-root decoction.

Your task: What is the safest next action, and which information would change your plan?

Model reasoning: Glycyrrhizin can worsen hypertension and potassium depletion; review medications and avoid risk.

Source: NCCIH Licorice Root safety.

Case 05: Liver disease and old class notes

Presentation: Patient with hepatitis and jaundice is offered several herbs from a 2018 classroom formula.

Your task: What is the safest next action, and which information would change your plan?

Model reasoning: Evaluate abnormal liver tests and hepatitis management first. Some botanicals are hepatotoxic; historical formulas are not evidence-based replacements.

Source: Uploaded chronic viral infection case; current safety framing.

Case 06: Unclear botanical identity

Presentation: Label says only “ginseng 500 mg”. Patient is on glucose-lowering medicines.

Your task: What is the safest next action, and which information would change your plan?

Model reasoning: Ask exact species/part, preparation, strength, product certification and interactions; no interchangeable common name assumption.

Source: Uploaded adaptogen chart; current product safety.

Case 07: Pregnancy and herbal tonic

Presentation: A pregnant patient asks about a multi-herb reproductive formula borrowed from old course notes.

Your task: What is the safest next action, and which information would change your plan?

Model reasoning: Do not recommend without pregnancy-specific evidence and qualified review; screen for uterotonic botanicals and contraindications.

Source: Uploaded reproductive lecture and safety references.

Case 08: Toxic herbal “cardiotonic”

Presentation: A patient with palpitations takes a foxglove preparation purchased online.

Your task: What is the safest next action, and which information would change your plan?

Model reasoning: Potential cardiac-glycoside poisoning; urgent evaluation/poison control. Foxglove is not a safe home cardiotonic.

Source: Uploaded toxicity lecture.

Case 09: Preparation not interchangeable

Presentation: A student substitutes 600 mg whole powdered root for 600 mg concentrated standardized extract.

Your task: What is the safest next action, and which information would change your plan?

Model reasoning: Not equivalent: confirm botanical identity, part, DER, solvent/marker concentration, quality, dose-specific evidence.

Source: Uploaded Botanical Preparations and Formulating notes.

Case 10: Mild reflux and peppermint

Presentation: Patient with heartburn and reflux asks for concentrated peppermint oil after reading it is “carminative”.

Your task: What is the safest next action, and which information would change your plan?

Model reasoning: Peppermint can aggravate reflux; consider diagnosis, product route and alternative evidence-based approaches.

Source: Uploaded herb-action worksheet; exam application.

Case 11: Autoimmune disease on treatment

Presentation: Patient with rheumatoid arthritis wants to stop disease-modifying medication for turmeric and mushrooms.

Your task: What is the safest next action, and which information would change your plan?

Model reasoning: Do not stop standard treatment; evaluate risks, interactions, measurable outcomes and rheumatology coordination.

Source: Uploaded rheumatoid arthritis case; safety-first rewrite.

Case 12: Insomnia with sedatives

Presentation: Patient taking benzodiazepines asks to combine valerian, passionflower and kava.

Your task: What is the safest next action, and which information would change your plan?

Model reasoning: Potential additive sedation; kava has serious liver injury risk. Review all medicines and avoid unsafe combinations.

Source: Uploaded nerve/sedative lecture; NCCIH Kava.

Cases are adapted from uploaded historical teaching materials and independently authored safety scenarios. They do not reproduce official exam items; treatment information must be checked against current clinical guidance.