Clinical & Applied Pharmacology Evidence Guide
This module synthesizes the uploaded journal articles, guidelines, screening tools, and supplemental references into practical diagnosis-and-treatment guidance for advanced practice.
Unit I: Cardiovascular Therapeutics
Hypertension: diagnosis, thresholds, and first-line treatment
Clinical significance: Blood pressure risk increases continuously, and uncontrolled hypertension drives stroke, heart failure, chronic kidney disease, vascular disease, and left ventricular hypertrophy. Confirm elevated office readings with proper technique and consider home or ambulatory monitoring when readings vary or white-coat/masked hypertension is suspected.
Thiazide/thiazide-like diuretics, ACE inhibitors, ARBs, and calcium channel blockers are usual initial options.
Start at >=130/80 with clinical CVD or 10-year ASCVD risk >=10%; start at >=140/90 in lower-risk adults.
Initial therapy should include a thiazide-type diuretic or calcium channel blocker.
Recheck BP and adverse effects within about 1 month after starting or intensifying therapy.
Cholesterol management and ASCVD prevention
Clinical significance: LDL-C and apoB-containing lipoproteins are core drivers of atherosclerotic cardiovascular disease. Treatment intensity is based on ASCVD history, LDL-C level, diabetes status, age, and 10-year risk.
| Patient group | Preferred approach |
|---|---|
| Clinical ASCVD | High-intensity or maximally tolerated statin; goal is >=50% LDL-C reduction. |
| Very high-risk ASCVD with LDL-C >=70 mg/dL despite maximal statin | Add ezetimibe; consider PCSK9 inhibitor if still above threshold. |
| LDL-C >=190 mg/dL, age 20-75 | High-intensity statin without requiring risk calculation. |
| Diabetes age 40-75 | At least moderate-intensity statin; high-intensity if multiple risk factors or higher ASCVD risk. |
Heart failure, cardiac rehab, and weight goals
Supplemental evidence emphasizes medication optimization, lifestyle support, weight-loss goal setting, and behavioral weight-loss programs when appropriate.
Unit II: Infectious Disease, Stewardship & Prevention
Respiratory infections and antibiotic stewardship
Most upper respiratory infections are viral. Antibiotic overuse increases resistance, adverse drug events, and C. difficile risk. Patient-and-provider education can reduce inappropriate prescribing for respiratory tract infections.
Antimicrobial prescribing in older adults
Older adults may lack fever or leukocytosis. Prescribing must account for renal function, drug interactions, delirium/fall risk, QT prolongation, tendon injury, and C. difficile risk.
Fluoroquinolone + glucocorticoid -> tendon rupture risk.
Macrolide + statin -> myopathy/rhabdomyolysis risk.
Trimethoprim-sulfamethoxazole + ACEI/ARB/spironolactone -> hyperkalemia risk.
Skin and soft-tissue infections
Cellulitis, abscess, and necrotizing fasciitis require different management. Necrotizing fasciitis is a surgical emergency with severe pain, rapid progression, systemic toxicity, bullae, crepitus, anesthesia, or necrosis.
Cover streptococci; add MRSA coverage for purulence or high-risk features.
Incision and drainage is primary; antibiotics when systemic illness or high-risk features exist.
Immediate surgical consultation, broad-spectrum IV antibiotics, and debridement.
Cellulitis: cobblestoning. Abscess: fluid collection. Nec fasc: fascial fluid/gas/thickening.
HIV prevention and PrEP
PrEP is important for patients without HIV at substantial risk, including recent STI, partner with HIV, inconsistent condom use with higher-risk partners, or injection-drug risk. Before PrEP: confirm HIV-negative status, assess renal function, screen hepatitis B/STIs, and counsel adherence.
Immunizations and emerging infectious therapies
Vaccines prevent substantial morbidity and mortality. Patient education should address mechanism, safety, contraindications, community protection, and misconceptions. Newer therapies such as monoclonal antibody treatment for Ebola and oral immunotherapy for peanut allergy require strict protocols and monitoring.
Unit III: Dermatology, Allergy & Eye Red Flags
Psoriasis: diagnosis and treatment selection
Psoriasis is a chronic immune-mediated disease involving TNF-, IL-23, IL-17, and keratinocyte hyperproliferation. Plaque psoriasis presents as well-demarcated erythematous plaques with silvery scale. Screen for nail pitting, onycholysis, dactylitis, and psoriatic arthritis.
Topical corticosteroids, vitamin D analogs, emollients, keratolytics.
Phototherapy, methotrexate, cyclosporine, acitretin, or biologics.
Screen TB, hepatitis, infection risk, and immunization status.
Erythrodermic or generalized pustular psoriasis.
Atopic and contact dermatitis
Atopic dermatitis is intensely pruritic and chronic/relapsing; distribution varies by age. Contact dermatitis may be irritant or allergic; exposure history and distribution pattern are essential.
Rosacea and common primary-care skin conditions
Rosacea involves central facial erythema, flushing, papules/pustules, and telangiectasia. Topical oxymetazoline can reduce persistent erythema through alpha-adrenergic vasoconstriction.
Red eye and ophthalmology referral
Urgent referral is needed for vision loss, severe pain, photophobia, corneal opacity, trauma, contact-lens keratitis concern, fixed mid-dilated pupil, proptosis, restricted/painful extraocular movements, or suspected globe injury.
Allergy and anaphylaxis
Type I reactions are IgE-mediated and include anaphylaxis, asthma, and allergic rhinitis. Contact dermatitis such as poison ivy is a type IV delayed hypersensitivity reaction. For anaphylaxis, epinephrine is first-line and should not be delayed.
Unit IV: Behavioral Health, Pain & Substance Use
Depression, anxiety, sleep, and ADHD
Depression treatment should aim for remission. SSRIs/SNRIs are commonly first-line. ADHD evaluation requires impairment across settings and childhood history; stimulants are first-line when appropriate, while atomoxetine, guanfacine/clonidine, or bupropion may be options.
Chronic pain, opioid risk, and family history
Chronic pain management should integrate pain type, function, mood, sleep, substance-use risk, family history, and prior response. Use multimodal nonopioid therapy, functional goals, PDMP review, urine drug testing when indicated, naloxone education, and motivational interviewing.
Cannabis, tobacco, and alcohol
Tobacco cessation works best with counseling plus pharmacotherapy. E-cigarettes are not preferred cessation therapy. Alcohol screening with AUDIT/SBIRT helps identify who needs brief intervention or referral.
Unit V: Pharmacokinetics, Genomics & Medication Safety
Pharmacogenetic testing in primary care
Pharmacogenetic testing can explain adverse effects or poor response and support individualized prescribing when the drug-gene relationship is actionable.
| Gene/pathway | Clinical implication |
|---|---|
| CYP2D6 | Codeine/tramadol efficacy and toxicity vary by metabolizer status. |
| CYP2C19 | Clopidogrel activation and some SSRI/PPI responses may be affected. |
| CYP2C9/VKORC1 | Warfarin sensitivity and bleeding risk may be influenced by genotype. |
| HLA variants | Some variants predict severe hypersensitivity reactions for select medications. |
Renal dosing and altered pharmacokinetics
Kidney disease changes elimination and can affect absorption, distribution, protein binding, and metabolism. Estimate renal function before prescribing renally cleared or nephrotoxic drugs.
Polypharmacy and deprescribing in older adults
Assess appropriateness, interactions, omissions, goals of care, and patient priorities-not only medication count. Reconcile all drugs and supplements, prioritize high-risk/low-benefit medications, taper when needed, and monitor outcomes.
Biosimilars and SBAR
Biosimilars are highly similar to reference biologics with no clinically meaningful differences in safety, purity, or potency, but they are not traditional generics. SBAR supports medication safety when escalating concerns or transferring care.
Unit VI: GI, Endocrine, Women's Health & Primary Care Evidence
Constipation and IBS
Constipation requires assessment of stool pattern, medications, red flags, hydration, diet, activity, and bowel habits. IBS is a gut-brain interaction disorder associated with impaired quality of life; psychological interventions can improve quality-of-life domains for selected patients.
Diabetes beyond type 2, insulin, and thyroid emergencies
Consider latent autoimmune diabetes in adults or atypical diabetes when there is lower BMI, weight loss, ketosis, rapid insulin requirement, autoimmune history, or poor response to typical type 2 therapy. Myxedema coma and thyroid storm require prompt recognition and urgent endocrine-directed therapy.
Contraception, menopause, OAB, and STIs
Contraceptive counseling should be evidence-based, patient-centered, and free from coercion. Menopause care should discuss hormone therapy and limits of complementary therapies. OAB may improve with bladder training and pelvic floor muscle training. STI care requires current testing, treatment, partner management, retesting, and inclusive sexual-history taking.
Patient education and prescribing influence
Direct-to-consumer advertising can influence patient requests. Clinicians should explain absolute benefit and risk in plain language and align decisions with evidence, patient goals, safety, and cost.
Source articles used in this synthesis
The full extracted source pages remain available in the Source Library. Search terms such as psoriasis, PrEP, renal dosing, cholesterol, hypertension, IBS, dermatitis, polypharmacy, pharmacogenetic, or antimicrobial older adults will locate both this synthesis and the original article extraction pages.