AMC MCQ exam Prep by Dr Jayse

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https://www.instagram.com/reel/DcYRrq0Th-n/?igsi=MTR4YmV6cmt6d29haQ== Answer in the comment

The correct answer is B.Gentamicin Explanation Mechanism: Aminoglycosides like gentamicin can inhibit the pre-synaptic release of acetylcholine and decrease post-synaptic sensitivity to acetylcholine at the neuromuscular junction. Risk: This mechanism can severely exacerbate muscle weakness and trigger a life-threatening myasthenic crisis in patients with Myasthenia Gravis. Other choices: While macrolides (like Azithromycin) also carry warnings for Myasthenia Gravis, aminoglycosides like Gentamicin are classic, well-documented agents known for directly inducing or worsening a neuromuscular blockade. Amoxicillin and Doxycycline are generally considered safe alternatives.

👂 EAR INFECTIONS — Know the Pattern, Find the Site Ear disease becomes much easier when you ask one question first: Where is the pathology? ⸻ 1️⃣ Acute Otitis Media Middle-ear infection, often following a viral URTI. Ear pain, fever and a bulging, erythematous tympanic membrane. Common organisms: S. pneumoniae, H. influenzae, and M. catarrhalis. ⸻ 2️⃣ Otitis Externa Infection of the external auditory canal, commonly associated with water exposure. Classically causes pain when the tragus is pressed or pinna is pulled. Pseudomonas aeruginosa is an important organism. ⚠️ In older patients with diabetes, severe persistent otalgia may suggest malignant otitis externa. ⸻ 3️⃣ Bullous Myringitis Painful bullae on the tympanic membrane. Presents with severe otalgia and may accompany acute otitis media. ⸻ 4️⃣ Mastoiditis Complication of middle-ear infection spreading into the mastoid air cells. Look for post-auricular pain, redness and swelling with displacement of the pinna. Requires urgent assessment and IV antibiotics. ⸻ 5️⃣ Cholesteatoma Not a true infection — an abnormal keratinizing epithelial mass in the middle ear. Think of recurrent painless, often foul-smelling discharge with conductive hearing loss. Definitive treatment is usually surgical. 💡 Clinical Pearl: Pain on tragal movement → Otitis externa Bulging tympanic membrane → Acute otitis media Post-auricular swelling → Mastoiditis Painless recurrent discharge + hearing loss → Cholesteatoma Explore our high-yield medical books for concise, visual and exam-focused revision: Aumedprep.com.au

💡HYPOXIA: LOW O₂, MANY CAUSES! Hypoxia is a sign, not a diagnosis. Understanding the mechanism helps you identify the cause and treat it quickly. ⸻ 1️⃣ V/Q Mismatch 📍 Most common cause of hypoxia 🔹 Ventilation and perfusion are mismatched 🔹 Seen in asthma, COPD, pneumonia 💎 Pearl: Improves with supplemental oxygen. ⸻ 2️⃣ Shunt 📍 Blood bypasses ventilated alveoli 🔹 No gas exchange occurs 🔹 Seen in ARDS, severe pneumonia, atelectasis 💎 Pearl: Does NOT significantly improve with oxygen. ⸻ 3️⃣ Diffusion Defect 📍 Impaired gas transfer across alveolar membrane 🔹 Pulmonary fibrosis 🔹 Interstitial lung disease 💎 Pearl: Worse during exercise. ⸻ 4️⃣ Hypoventilation 📍 Reduced alveolar ventilation 🔹 CNS depression 🔹 Neuromuscular disorders 🔹 Obesity hypoventilation 💎 Pearl: ↑ PaCO₂ + ↓ PaO₂ ⸻ 5️⃣ Low FiO₂ 📍 Reduced inspired oxygen 🔹 High altitude 🔹 Poorly ventilated environments 💎 Pearl: Improves with increased FiO₂. ⸻ 6️⃣ Pulmonary Embolism (PE) 📍 Perfusion defect 🔹 Sudden dyspnea 🔹 Pleuritic chest pain 🔹 Tachycardia 💎 Pearl: Ventilation present, perfusion absent. ⸻ 7️⃣ ARDS 📍 Diffuse alveolar injury 🔹 Severe hypoxemia 🔹 Pulmonary edema 🔹 Reduced lung compliance 💎 Pearl: Refractory hypoxemia despite oxygen therapy. ⸻ 💎 High-Yield Exam Pearls 🫁 V/Q Mismatch → Most common 🫁 Shunt → Doesn’t improve with O₂ 🫁 Diffusion Defect → Worse on exertion 🫁 Hypoventilation → High CO₂ 🫁 Low FiO₂ → High altitude 🫁 PE → Ventilation without perfusion 🫁 ARDS → Refractory hypoxemia ⸻ 📚aumedprep.com.au

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#aug2026 What fine-motor skill is expected in a 3-year-old child? Answer: Using safety scissors to cut out a circle. What is the approximate risk of schizophrenia when both parents have schizophrenia? Answer: Approximately 40–46%. A woman has postpartum haemorrhage with a firm, well-contracted uterus and a vaginal tear. What should you do? Answer: Perform a thorough cervical and vaginal examination and repair the trauma. A pregnant woman has recurrent symptomatic gallstones. What is the appropriate management? Answer: Laparoscopic cholecystectomy should be considered. A patient has chronic cough, fever, weight loss and an abnormal chest X-ray suggestive of TB. What investigation should be performed? Answer: Sputum testing for mycobacterial culture and NAAT/PCR. What is appropriate VTE prevention for a low-risk patient undergoing short laparoscopic surgery with early mobilisation? Answer: Early mobilisation and hydration; pharmacological prophylaxis may not be required. A child has a displaced supracondylar fracture with a cold, pale, pulseless hand. What is the next step? Answer: Urgent orthopaedic management with immediate reduction and restoration of circulation. What is an appropriate medication for acute hypomania in bipolar disorder? Answer: Quetiapine. A 3-year-old has episodic abdominal pain, vomiting and blood/mucus in the stool. What is the best initial imaging investigation? Answer: Abdominal ultrasound. How should confirmed asymptomatic bacteriuria in pregnancy be managed? Answer: Treat with an appropriate antibiotic based on urine culture and sensitivities. What is the most important preventive measure for altitude sickness? Answer: Gradual ascent. What treatment should be considered after an osteoporotic fragility fracture? Answer: Anti-resorptive therapy such as a bisphosphonate, after appropriate assessment. What is the treatment for an acute haemarthrosis in a patient with severe haemophilia A? Answer: Factor VIII replacement. What is the initial management of a concerning CTG suggesting fetal compromise? Answer: Intrauterine resuscitation and expedited delivery if fetal compromise persists or is severe. What is first-line psychological treatment for OCD? Answer: Cognitive behavioural therapy with exposure and response prevention. What is the most likely diagnosis of a tender subareolar breast lump in a pubertal boy? Answer: Physiological pubertal gynaecomastia. What is the diagnosis when a patient has a persistent fixed delusion without other prominent psychotic symptoms? Answer: Delusional disorder. What is initial treatment for mild plaque psoriasis? Answer: Topical therapy, such as topical corticosteroids. What is first-line management for mild atopic dermatitis in a child? Answer: Regular emollients/moisturisers. A patient taking warfarin develops a significant rectus sheath haematoma. What is the initial management? Answer: Withhold anticoagulation and reverse it if clinically significant bleeding is present. What is initial management of uncomplicated constipation in an infant after starting solids? Answer: Dietary measures including adequate fluids and fibre; use an appropriate laxative if needed. A 6-year-old Aboriginal child has an incomplete vaccination history. What should be done? Answer: Follow the Australian catch-up immunisation schedule without restarting the vaccination course. Does a positive IGRA confirm active tuberculosis? Answer: No. What is first-line management for mild primary Raynaud phenomenon? Answer: Avoid cold exposure and keep the extremities warm. Which finding strongly suggests secondary Raynaud phenomenon? Answer: Digital ulcers or ischaemic changes.

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#may2026 Q1. Agitation in Alzheimer's Disease An 82-year-old woman with moderate Alzheimer's disease is becoming increasingly agitated and aggressive despite non-pharmacological interventions. Medication is being considered. Which of the following is the most appropriate first-line antipsychotic? A. Aripiprazole B. Clozapine C. Olanzapine D. Quetiapine E. Risperidone Q2. Persistent Parotid Swelling A 60-year-old man presents with a unilateral parotid swelling for 2 months associated with drooling of saliva. Examination confirms a firm parotid mass. What is the most appropriate initial investigation? A. Chest X-ray B. CT head C. Fine-needle aspiration cytology (FNAC) D. MRI neck E. Ultrasound Answer: C. FNAC Q3. Progressive Visual Loss A patient presents with progressive visual deterioration. Fundoscopy shows a pale optic disc in one eye and a pink optic disc in the other. Which investigation is most useful to assess visual field defects? A. CT brain B. MRI brain C. Perimetry D. Tonometry E. Visual evoked potentials Answer: C. Perimetry Q4. Excluding Malaria A traveller returns from overseas with daily fever and rash. Malaria is suspected. Which investigation is required to exclude malaria? A. Blood culture B. Malaria rapid antigen test only C. Peripheral blood film repeated over several days D. Stool culture E. Ultrasound abdomen Answer: C. Peripheral blood film repeated over several days Q5. Generalised Itching A woman presents with intense itching and scratch marks over her body. There are no visible primary skin lesions. What is the most appropriate initial treatment? A. Loratadine B. Oral prednisolone C. Permethrin cream D. Topical steroid cream E. UV phototherapy Answer: A. Loratadine Q6. Alzheimer's Disease and Refusal of Treatment An elderly woman with Alzheimer's disease wishes to return home. Her family believes she does not need medication. What is the most appropriate management? A. Arrange daily nursing supervision B. Deny discharge home C. Tell her she must take medication before discharge D. Encourage her son to ensure medications are taken at home E. Transfer to residential care Answer: D. Encourage her son to ensure medications are taken at home Q7. Adolescent Requesting Contraception A 13-year-old girl requests contraception and asks that her parents not be informed. What is the most appropriate next step? A. Assess her competence and understanding B. Deny contraception C. Inform her parents D. Require parental consent E. Refer to child protection immediately Answer: A. Assess her competence and understanding Q8. Collection of Insulin by Partner A woman attends to collect insulin prescribed for her boyfriend who is busy at work. What is the most appropriate action? A. Call the patient to confirm consent and then provide it B. Deny the request immediately C. Give the insulin without question D. Refer her to another pharmacy E. Require written consent only Answer: A. Call the patient to confirm consent and then provide it Q9. Epidural in Labour A woman in labour is 9 cm dilated and requests an epidural. Her husband states they had previously agreed not to have one. What is the most appropriate management? A. Arrange epidural after confirming the woman's wishes B. Deny epidural because of previous agreement C. Follow the husband's wishes D. Wait until delivery is imminent E. Obtain husband's written consent Answer: A. Arrange epidural after confirming the woman's wishes Q10. HIV Prevention Advice A man recently diagnosed with HIV attends with his husband seeking advice. What is the most appropriate recommendation? A. Abstain from all oral sex B. Avoid all sexual activity C. No prevention is necessary D. Use condoms consistently E. Separate sleeping arrangements Answer: D. Use condoms consistently Q11. Social Anxiety Disorder A university student is extremely shy, blushes frequently, struggles to make friends and repeatedly drops out of social activities. What is the most appropriate treatment? A. Cognitive behavioural therapy (CBT) B. Interpersonal therapy

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🚨 NEW PROMO – Limited to the First 10 Subscribers! 🚨 Sign up today and get 1 FREE Live Session! 🎉 We've just made your exam prep even better: ✅ NEW: Recall questions are now organised by topic for faster, focused revision. ✅ NEW: Updated Mock Exam to simulate the real exam experience. For ONLY $50 AUD, you'll get: ✔️ 1-month access to our high-yield QBank ✔️ Multiple mock exams ✔️ Complete revision notes ✔️ Topic-organised recall questions 🎁 BONUS: 1 FREE Live Session 💡 Stop wasting time searching for resources. Everything you need is in one place. ⏳ Limited to the first 10 subscribers! Sign up now: aumedprep.com.au