Clinical beta

FMBM is currently in clinical beta. Content is for professional review/testing and must not replace local protocols, senior clinical judgment, or official prescribing references.

Drug Monograph

Olmesartan

Olmesartan

Angiotensin receptor blocker (ARB)

AdultARBHTN

Indication

HTN

At a glance

INDICATIONS (CORE USE)

Hypertension-focused ARB where once-daily therapy is suitable.

ADULT DOSE (STANDARD)

PO START 20 mg daily; titrate as needed.

MAX DOSE

Common max 40 mg/day.

Route

PO once-daily profile

PEDIATRIC DOSE

Specialist pediatric HTN pathways only.

Do not miss

Must-not-miss safety points

Major warning

- Pregnancy contraindicated β†’ DO NOT use

Indications

USE IF: hypertension ARB-based pathway. AVOID IF: pregnancy, bilateral renal artery stenosis, baseline hyperkalemia, or active hypoperfusion.

Primary

  • Hypertension

Dosing

STANDARD (ADULT PO)

Titrate to BP response with interval kidney/electrolyte checks.

ADULT DOSE

Typical start 20 mg daily; increase as tolerated.

PEDIATRIC DOSE

N/A

MAX DOSE

Common max 40 mg/day.

Practical Note

Keep class-level renal/potassium safety checks even in uncomplicated HTN.

Warnings

Clinical warnings

  • Lower cough/angioedema risk vs ACE inhibitors, but not zero
  • First-dose hypotension risk (especially HF / volume depletion)
  • Renal perfusion-dependent β†’ creatinine rise possible

Contraindications

  • Pregnancy
  • Bilateral renal artery stenosis (known/suspected)
  • Baseline K+ β‰₯5.5 mmol/L

Drug interactions

  • ACE inhibitor / aliskiren combination: avoid routine dual RAAS blockade (AKI, hyperkalemia, hypotension risk)
  • Potassium-sparing agents / supplements: hyperkalemia risk
  • NSAIDs β†’ ↑ AKI risk + ↓ ARB effect β€” avoid or monitor closely
  • NSAIDs can blunt effect and raise AKI risk.

Special populations

Pediatrics

Specialist pediatric HTN pathways only.

Pregnancy

Pregnancy: contraindicated.

Lactation

specialist decision.

Renal impairment

Monitor creatinine and potassium after start/titration.

Hepatic impairment

No special class exception; titrate clinically.

Elderly

Start low if orthostatic risk is present.

Administration

PO daily at consistent time.

Monitoring

  • Recheck: - Check creatinine + potassium within 1–2 weeks after initiation - Recheck creatinine + potassium within 1–2 weeks after dose increase - Check earlier if CKD, elderly, volume depletion, or interacting drugs
  • Hold if:
    - HOLD if:
    - SBP <90–100
    - K+ β‰₯5.5 mmol/L
    - creatinine rise >30% from baseline
    - symptomatic hypotension
  • If targets not met after reassessment of dose, organ function, and interactions β†’ escalate per protocol (DO NOT continue blindly)

Overdose / toxicity

Clinical Picture

A) Mild β†’ dizziness, hypotension, fatigue B) Moderate β†’ persistent hypotension, AKI trend, hyperkalemia C) Severe β†’ refractory shock, severe hyperkalemia, respiratory compromise

Immediate Actions

β€’ Airway + continuous monitoring (ABC, BP, telemetry) β€’ Hypotension β†’ IV fluids first-line β€’ Refractory hypotension β†’ early vasopressors β€’ Stop ARB immediately

Antidote

- No specific antidote - Supportive care + hemodynamic stabilization - Hyperkalemia treatment β†’ calcium + insulin/dextrose + potassium-shifting protocol

Decontamination

β€’ Recent oral ingestion β†’ activated charcoal if protected airway and early presentation (toxicology-guided)

Escalation

- Refractory hypotension β†’ ICU / vasopressors - Severe hyperkalemia / AKI β†’ nephrology + renal replacement planning if indicated

Clinical pearls

Common mistakes, resistance logic, and bedside traps

High-Yield Summary

Olmesartan identity stays HTN-focused; do not overstate beyond evidence context.

Clinical pearls

Simple dosing still needs strict lab safety checks after changes.

ARB safety

    Pharmacokinetics

    Daily dosing with BP-focused class use.

    Mechanism of action

    AT1 receptor blockade attenuates angiotensin II signaling.

    Common brand names

    Saudi Arabia

    Olmetec, Benicar

    Global

    (placeholder β€” verify local formulation)

    Common trade names are curated examples only β€” formulations and availability vary. Verify the exact product name with your local pharmacy and national regulator before prescribing or dispensing.

    Country practice notes

    Global data (no country-specific data available)

    • Follow local antimicrobial stewardship policy, hospital formulary, and national resistance guidance.
    • Confirm dosing, stock, and restrictions with institutional pharmacy and current product labeling.

    References

    Saudi Arabia

    • SFDA (Saudi Food & Drug Authority)
    • Saudi National Formulary / MOH (where available)

    International

    • WHO Model List of Essential Medicines (verify current edition)
    • US FDA or EU EMA product information (when national SmPC is unavailable)
    • ACC / AHA HF, HTN, CKD guidance
    • KDIGO CKD / albuminuria guidance
    • FDA / SFDA product labeling

    Do not miss

    • Pregnancy contraindicated β†’ DO NOT use
    • Hyperkalemia risk β†’ monitor potassium early
    • Creatinine rise / AKI risk (bilateral renal artery stenosis / volume depletion)
    • First-dose hypotension β†’ correct volume before starting