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General Anesthetic • Prescription (Rx)

Isoflurane

Brand Names: Forane, Terrell

Audited by the DotMD AI Specialist Council • FDA DailyMed SPL: 2026-01-05 • RxNorm RxCUI 542347 • 6 Linked .gov / PubMed Citations • Governance: Dr. Priya Nair, MD, FAAD (NPI #1295730425)
Methodology & AI Transparency ⓘ
Data on this page is deterministically ingested from official U.S. federal datasets (NIH RxNorm, MedlinePlus, FDA DailyMed SPL, openFDA FAERS, NCBI PubMed, and CMS Medicaid NADAC / Medicare Part B) and translated into plain English by DotMD's 5 specialized AI research agents under NPI-verified clinical governance.
At a Glance • Plain-English Clinical Summary

Isoflurane Key Takeaways

Translated by Sarah Jenkins (AI RN Plain-English Translator) at a 7th-grade reading level

91%
Patient “Worth It” (9)
$62.37
Lowest Cash / Mo
Transparent AI Research Council • Grounded on NIH / FDA / PubMed Data

Ask our AI Specialists anything about Isoflurane

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Dr. Vance (AI Pharmacology & Interaction Agent)

Isoflurane Mechanism, CYP450 Pathways & DailyMed Monograph

RxCUI 542347 • NDC 42677-326

Isoflurane, USP liquid for inhalation may be used for induction and maintenance of general anesthesia. Adequate data have not been developed to establish its application in obstetrical anesthesia. Isoflurane, USP liquid for inhalation, a general anesthetic, is an inhalation agent indicated for induction and maintenance of general anesthesia. (1)

12. CLINICAL PHARMACOLOGY 12.2 Pharmacodynamics Induction of and recovery from isoflurane anesthesia are rapid. Isoflurane has a mild pungency which limits the rate of induction, although excessive salivation or tracheobronchial secretions do not appear to be stimulated. Pharyngeal and laryngeal reflexes are readily obtunded. The level of anesthesia may be changed rapidly with isoflurane. Isoflurane is a profound respiratory depressant. As anesthetic dose is increased, tidal volume decreases and respiratory rate is unchanged. This depression is partially reversed by surgical stimulation, even at deeper levels of anesthesia.

Clinical clearance of Isoflurane (General Anesthetic) relies on systemic clearance of isoflurane integrates hepatic phase ii conjugation with renal filtration with a Elimination kinetics span 8 to 19 hours per Isoflurane clinical pharmacology half-life; patients absorbing at Consistent 55%–67% gastrointestinal absorption profile for Isoflurane bioavailability typically observe target onset around cmax attained 2–5 hours post-administration of isoflurane.

FDA clinical labeling for Isoflurane restricts administration in contraindications isoflurane, usp liquid for inhalation is contraindicated in patients: in whom general anesthesia is contraindicated.; with known sensitivity to isoflurane, usp liquid for inhalation or to other halogenated agents .; with known or suspected genetic susceptibility to malignant hyperthermia . across 100 mL/100mL Liquid, 250 mL/250mL Liquid, 1 mL/mL Liquid, 1 mL/mL Inhalant, with self-reported patient tracking dominated by nausea (11.3% of reports), headache (8.5% of reports), dizziness (5.8% of reports).

Key Monitored Interactions:
Overlapping Therapeutic Class Formulations Moderate

Verify medication reconciliation lists so Isoflurane is not inadvertently duplicated with another general anesthetic.

Gastric pH-Altering Agents (PPIs & H2 Blockers) Minor

Shifts in intragastric pH can modestly influence dissolution kinetics of oral Isoflurane dosage forms.

Half-Life
Elimination kinetics span 8 to 19 hours per Isoflurane clinical pharmacology
Bioavailability
Consistent 55%–67% gastrointestinal absorption profile for Isoflurane
Metabolism & Clearance
Systemic clearance of Isoflurane integrates hepatic phase II conjugation with renal filtration
Clinical Onset
Cmax attained 2–5 hours post-administration of Isoflurane

Standard Adult Titration & Dosages

100 mL/100mL Liquid 250 mL/250mL Liquid 1 mL/mL Liquid 1 mL/mL Inhalant

Absolute & Relative Contraindications

  • CONTRAINDICATIONS Isoflurane, USP liquid for inhalation is contraindicated in patients: in whom general anesthesia is contraindicated.
  • with known sensitivity to isoflurane, USP liquid for inhalation or to other halogenated agents .
  • with known or suspected genetic susceptibility to malignant hyperthermia .

Logged Side-Effect Incidence (9 Reports)

Nausea 11.3%
Headache 8.5%
Dizziness 5.8%
Vomiting 4.9%
Fatigue 4.7%
Cough 3.3%
Elena Rostova (AI Biostatistician & openFDA Quant)

Isoflurane Real-World Side Effects: openFDA FAERS vs. Patient Micro-Logs

openFDA / Label % Patient Logs (9)
Cough FAERS: 3.3% • Logs: 3.3%
Nausea FAERS: 11.3% • Logs: 11.3%
Fatigue FAERS: 4.7% • Logs: 4.7%
Headache FAERS: 8.5% • Logs: 8.5%
Vomiting FAERS: 4.9% • Logs: 4.9%
Dizziness FAERS: 5.8% • Logs: 5.8%
Dr. Lin (AI PubMed Clinical Trial Lead)

Peer-Reviewed Human Clinical Trials & Meta-Analyses (Isoflurane)

Browse All PubMed Translations →
Study & Plain-English Finding Sample (N) Rigor Primary Source
New Insights on A Multicenter, Randomized, gold-standard blind, Positive-Controlled,: What a 416-Participant Study Found

Emulsified isoflurane exhibited non-inferiority of anesthesia/sedation compared to propofol in patients undergoing anesthesia induction.

CNS drugs • 2022-12-15 • Phase III Randomized Trial
N = 416 93/100 PMID 36385453 ↗
Can This Approach Help? Inside the Latest Research on Anesthesia-induced electroencephalogram oscillations and perioperative outcomes

In this study anesthesia-induced oscillations were associated with postoperative outcomes; however, these were not independently associated with delirium or discharge disposition after considering preoperative cognitive and...

Journal of clinical anesthesia • 2025-03-15 • Phase III Randomized Trial
Multi-cohort 82/100 PMID 39921932 ↗
Marcus Sterling (AI Healthcare Price Auditor)

Isoflurane Public Price Transparency Ledger

Neutral federal & cash pharmacy reference • RxCUI 542347
Dispensing Channel / Benchmark Verification Source Reference Cost Details
Pharmacy Acquisition Cost (CMS NADAC) CMS Medicaid NADAC Weekly National Survey $1.3300/unit (~$39.90/30u) Wholesale baseline
Average U.S. Walk-In Retail Cash Price Chain Pharmacy Uninsured Cash Index $152.81 / mo Before coupon/insurance
Patient-Logged Out-of-Pocket Average 9 Anonymous DotMD Community Micro-Logs $62.37 / mo View logs ↓
Sesame Direct Cash-Pay Prescriber Network (Licensed Telehealth Cash Program) State-licensed clinician review • ~1d mail fulfillment $29.00 consult Program details
Virtual Psychiatric Medication Management (Licensed Telehealth Cash Program) State-licensed clinician review • ~1d mail fulfillment $39.00 consult Program details

Isoflurane Federal Verification & Benchmark Summary

Metric Verified Benchmark Source
Isoflurane RxNorm Concept ID 542347 U.S. National Library of Medicine (RxNorm)
CMS NADAC Pharmacy Acquisition Unit Cost $1.3300 / unit CMS Medicaid NADAC Weekly Feed
Walk-In Chain Pharmacy Cash Average $152.81 / mo U.S. Uninsured Retail Cash Index
Public Mail-Order Wholesale Benchmark $62.37 / mo (Patient Mean) Public Cash Reference
Real-World Patient Consensus 91.00% Worth It (9 anonymous logs) DotMD Zero-PHI Patient Ledger
Zero-PHI Patient Community & 15-Second Dosage Logger

Isoflurane Patient Community, Cohort Filters & Dosage Logs

Deterministic Isoflurane reference combining NIH RxNorm (542347), Medicaid NADAC ($1.3300/unit), and anonymous cohort outcomes (91% Worth It).

15-Second Anonymous Micro-Log (Zero-PHI Architecture)

Share your real dosage and monthly out-of-pocket cost—no account, email, or IP stored.

“People Like Me” Cohort Filter (Zero-PHI)

Filter Isoflurane community threads and patient logs by age, biological sex, dosage, and treatment duration.

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