modelG03FB05
Extends from Pharmacokinetic.Models.PK_2C_enteral.
Information
| name: | NorethisteroneAndEstrogen | |
| ATC code: | G03FB05 | route: | oral |
| compartments: | 2 | |
| dosage: | 1 | mg |
| volume of distribution: | 4.5 | L |
| clearance: | 40 | L/h |
| other parameters in model implementation | ||
A fixed combination oral contraceptive containing norethisterone (a synthetic progestogen) and estrogen (usually ethinylestradiol or estradiol valerate), used in the management of menopausal symptoms, hormone replacement therapy, and as birth control. Still widely approved and in use for contraception and menopausal treatment.
Pharmacokinetics
Estimated pharmacokinetics for healthy adult women based on known profiles of combined norethisterone and estrogen products, in absence of published compartmental PK models for the fixed combination.
References
Vose, CW, et al., & Serlin, MJ (1979). Bioavailability and pharmacokinetics of norethisterone in women after oral doses of ethynodiol diacetate. Contraception 19(2) 119–127. DOI:10.1016/s0010-7824(79)80024-4 PUBMED:https://pubmed.ncbi.nlm.nih.gov/428229
Goldzieher, JW (1990). Selected aspects of the pharmacokinetics and metabolism of ethinyl estrogens and their clinical implications. American journal of obstetrics and gynecology 163(1 Pt 2) 318–322. DOI:10.1016/0002-9378(90)90575-r PUBMED:https://pubmed.ncbi.nlm.nih.gov/2196804
Garza-Flores, J, et al., & Perez-Palacios, G (1991). Long-acting hormonal contraceptives for women. The Journal of steroid biochemistry and molecular biology 40(4-6) 697–704. DOI:10.1016/0960-0760(91)90293-e PUBMED:https://pubmed.ncbi.nlm.nih.gov/1958567
Parameters
| Type | Name | Default | Description |
|---|---|---|---|
| Modelica.Units.SI.Mass | weight (from PK_1C) | 75 | patient weight (kg) |
| Modelica.Units.SI.SpecificVolume | VdPerKg (from PK_1C) | 0.9 | Volume of distribution (L/kg) |
| Modelica.Units.SI.MassFraction | F (from PK_1C) | 0.8 | bioavailiability (0-1) |
| Pharmacolibrary.Types.Clearance | Cl (from PK_1C) | 20 | clearance |
| Modelica.Units.SI.Time | adminTime (from PK_1C) | 60 | first administration time (s) |
| Modelica.Units.SI.Time | adminDuration (from PK_1C) | 600 | administration duration (s) |
| Modelica.Units.SI.Time | adminPeriod (from PK_1C) | 8*60*60 | period of administration (default 8 hours)(s) |
| Pharmacolibrary.Types.Mass | adminMass (from PK_1C) | 1000 | administration mass (mg) |
| Integer | adminCount (from PK_1C) | 8 | number of dose administered (1) |
| Pharmacolibrary.Types.Volume | Vd (from PK_1C) | VdPerKg*weight | Volume of distribution (m3) |
| Pharmacolibrary.Types.MassConcentration | Cmin (from PK_1C) | 0.004 | minimal therapeutic range |
| Pharmacolibrary.Types.MassConcentration | Cmax (from PK_1C) | 0.008 | minimal therapeutic range |
| Pharmacolibrary.Types.MassConcentration | Ctox_peak (from PK_1C) | 0.012 | toxicity peak level |
| Pharmacolibrary.Types.MassConcentration | Ctox_trough (from PK_1C) | 0.006 | toxicity trough level |
| Pharmacolibrary.Types.Volume | Vdp (from PK_2C) | VdpPerKg*weight | Volume of distribution (m3) |
| Modelica.Units.SI.SpecificVolume | VdpPerKg (from PK_2C) | 0.9 | Volume of distribution peripheral(l/kg) |
| Pharmacolibrary.Types.Clearance | k12 (from PK_2C) | 1 | intercompartmental C-P clearance |
| Pharmacolibrary.Types.Clearance | k21 (from PK_2C) | 1 | intercompartmental P-C clearance |
| Pharmacolibrary.Types.TransferRate | ka (from PK_2C_enteral) | 0.016666666666666666 | first order absorption rate |
| Modelica.Units.SI.Time | Tlag (from PK_2C_enteral) | 600 | delay between oral administration and absorption (default 10min) |
Connectors
| Type | Name | Default | Description |
|---|---|---|---|
| Types.ConcentrationOutput | C_central (from PK_1C) | ||
| Interfaces.ConcentrationPort_b | centralCPort (from PK_1C) | ||
| Interfaces.ConcentrationPort_b | peripheralCPort (from PK_2C) | ||
| Pharmacolibrary.Types.ConcentrationOutput | C_peripheral1 (from PK_2C) |
Components
| Type | Name | Default | Description |
|---|---|---|---|
| Pharmacokinetic.NoPerfusedTissueCompartment | central (from PK_1C) | ||
| Pharmacokinetic.ClearanceDrivenElimination | elim (from PK_1C) | ||
| Sources.PeriodicDose | periodicDose (from PK_1C) | ||
| Modelica.Units.SI.Time | t1_2 (from PK_1C) | elimination half-life | |
| Pharmacolibrary.Pharmacokinetic.TransferFirstOrderNonSym | transfer (from PK_2C) | ||
| Pharmacolibrary.Pharmacokinetic.NoPerfusedTissueCompartment | peripheral (from PK_2C) |
Revisions
- 06/2025 Tomas Kulhanek, generated model from data extracted from PUBMED, DrugBank and LLM(GPT4.1)