modelG03FA10
Extends from Pharmacokinetic.Models.PK_1C_enteral.
Information
| name: | NorgestrelAndEstrogen | |
| ATC code: | G03FA10 | route: | oral |
| compartments: | 1 | |
| dosage: | 0.3 | mg |
| volume of distribution: | 1.5 | L |
| clearance: | 0.04 | L/hr/kg |
| other parameters in model implementation | ||
Norgestrel and estrogen is a combined oral contraceptive agent containing the progestin norgestrel and an estrogen, typically ethinylestradiol. This combination is used primarily for prevention of pregnancy. While highly effective as a contraceptive, some formulations are less commonly used in current clinical practice compared to newer generation products.
Pharmacokinetics
Estimated average pharmacokinetics for oral administration of norgestrel 0.3 mg and ethinylestradiol 0.03 mg in healthy adult women based on available literature for component drugs; no direct population PK model for the fixed combination was identified.
References
Kuhnz, W (1990). Pharmacokinetics of the contraceptive steroids levonorgestrel and gestodene after single and multiple oral administration to women. American journal of obstetrics and gynecology 163(6 Pt 2) 2120–2127. DOI:10.1016/0002-9378(90)90551-h PUBMED:https://pubmed.ncbi.nlm.nih.gov/2124087
Olsson, B, & Landgren, BM (2001). The effect of tolterodine on the pharmacokinetics and pharmacodynamics of a combination oral contraceptive containing ethinyl estradiol and levonorgestrel. Clinical therapeutics 23(11) 1876–1888. DOI:10.1016/s0149-2918(00)89083-9 PUBMED:https://pubmed.ncbi.nlm.nih.gov/11768839
Anderson, MS, et al., & Iwamoto, M (2011). Effect of raltegravir on estradiol and norgestimate plasma pharmacokinetics following oral contraceptive administration in healthy women. British journal of clinical pharmacology 71(4) 616–620. DOI:10.1111/j.1365-2125.2010.03885.x PUBMED:https://pubmed.ncbi.nlm.nih.gov/21395656
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.TransferRate | ka (from PK_1C_enteral) | 0.016666666666666666 | first order absorption rate |
| Modelica.Units.SI.Time | Tlag (from PK_1C_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) |
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 |
Revisions
- 06/2025 Tomas Kulhanek, generated model from data extracted from PUBMED, DrugBank and LLM(GPT4.1)