Key Concepts in Healthcare
Pharmacology
Drug Interactions & Side Effects
Digoxin Levels: ↓ Digoxin levels can be caused by Antacids.
Pyridium (for UTI): May cause Hemolytic Anemia.
Ototoxicity (Medications): Aminoglycosides, loop diuretics, NSAIDs,
antihistamines, nasal decongestants, Quinine, ASA.
Antihypertensives in Pregnancy
Methyldopa (α-2-Agonist)
Labetalol
Nifedipine
Hydralazine
ACE Inhibitors & ARBs - Important Considerations
Common side effect of ACE Inhibitors: Dry, hacking cough (resolves
within a week of discontinuation).
Indications: Patients with Diabetes Mellitus (DM), Chronic Kidney
Disease (CKD), and Hypertension (HTN).
Cautions: Generally not recommended as first-line agents in African
Americans. Can cause angioedema.
Warfarin Management - Missed Dose
Within 12 hours of scheduled time: Take the missed dose.
Over 12 hours past scheduled time: Skip the dose and INR redraw will be
necessary.
Contraindications - Hydrochlorothiazide
Sulfa allergy
PCN hypersensitivity
Asthma
, Gout
Cardiology
Heart Murmurs
Systolic Murmurs (Often Benign)
o Mitral Regurgitation (MR): May cause Shortness of Breath
(SOB), Fatigue, Heart Failure (HF).
o Physiologic Murmur (Peyton Manning): Typically Asymptomatic.
o Aortic Stenosis (AS): May cause Angina, Syncope, Heart Failure
(HF).
o Mitral Valve Prolapse (MVP): Often presents with a "Click", more
common in women aged 14-30, may cause Palpitations, Chest Pain.
Diastolic Murmurs (Usually Abnormal)
o Aortic Regurgitation (AR): May cause Angina, Heart Failure
(HF), Dizziness, Chest Pain.
o Mitral Stenosis (MS): May cause Dyspnea, Atrial Fibrillation
(AFib).
Heart Sounds
S1: Closure of the Atrioventricular Valves (Mitral & Tricuspid).
S2: Closure of the Semilunar Valves (Aortic & Pulmonic).
S3: Often heard in Congestive Heart Failure (CHF); may be normal in
athletic adolescents.
S4: Often heard in Diastolic Heart Failure (HF), Left Ventricular
Hypertrophy (LVH), poorly controlled Hypertension (HTN), Myocardial
Infarction (MI).
Peripheral Artery Disease (PAD)
Treatment: Antiplatelets (e.g., Clopidogrel/Plavix, Aspirin/ASA),
Pentoxifylline (decreases blood viscosity).
Diagnosis:
o Gold Standard: Angiography.
o Ankle-Brachial Index (ABI).
Coronary Artery Disease (CAD) Treatment
, Atorvastatin/Rosuvastatin: Use high doses if LDL > 150. Monitor Liver
Function Tests (LFTs) and arthralgia. Adjust type and dose if issues arise.
Helps stabilize plaques.
Heart Failure (HF) Medications
ACE Inhibitors
Angiotensin Receptor Blockers (ARBs)
Angiotensin Receptor-Neprilysin Inhibitor (ARNI) with Beta-Blockers
(BBs)
Aldosterone Receptor Antagonists
Infectious Diseases
Enterobiasis Vermicularis (Pinworm)
Treatment Time: 2 weeks.
Treatment: Pyrantel Pamoate - one dose initially, then another dose in 2
weeks. Re-test after 2 weeks of last dose.
Infective Endocarditis - Key Signs
Janeway Lesions: Irregular, non-tender hemorrhagic macules on the hands
and feet.
Osler's Nodes: Split pea-sized, erythematous, tender nodules on the pads of
the fingers and toes.
Giardiasis
Signs & Symptoms: Foul-smelling stools, abdominal pain, flatulence
(can spread the disease), bloating/nausea/vomiting.
Treatment: Metronidazole 250mg TID.
Hepatitis B & C
Transmission: Bloodborne/Body fluids - highly infectious.
Important Co-testing: Patients testing positive should also be tested for
HIV due to common transmission routes.
Tuberculosis (TB)