modelR06AA02
Extends from Pharmacokinetic.Models.PK_2C_enteral.
Information
| name: | Diphenhydramine | |
| ATC code: | R06AA02 | route: | oral |
| compartments: | 2 | |
| dosage: | 50 | mg |
| volume of distribution: | 3.3 | L |
| clearance: | 1.33 | L/h/kg |
| other parameters in model implementation | ||
Diphenhydramine is a first-generation antihistamine with anticholinergic, antiemetic, and sedative properties. It is primarily used for the symptomatic relief of allergies, hay fever, common cold, insomnia, and as an antiemetic for motion sickness. It is approved and commonly used today as an over-the-counter medication.
Pharmacokinetics
Pharmacokinetic parameters reported in healthy adult volunteers after a single oral administration.
References
Luna, BG, et al., & Greenblatt, DJ (1989). Doxylamine and diphenhydramine pharmacokinetics in women on low-dose estrogen oral contraceptives. Journal of clinical pharmacology 29(3) 257–260. DOI:10.1002/j.1552-4604.1989.tb03323.x PUBMED:https://pubmed.ncbi.nlm.nih.gov/2723113
Spector, R, et al., & Ghoneim, MM (1980). Diphenhydramine in Orientals and Caucasians. Clinical pharmacology and therapeutics 28(2) 229–234. DOI:10.1038/clpt.1980.155 PUBMED:https://pubmed.ncbi.nlm.nih.gov/7398190
Paton, DM, & Webster, DR (1985). Clinical pharmacokinetics of H1-receptor antagonists (the antihistamines). Clinical pharmacokinetics 10(6) 477–497. DOI:10.2165/00003088-198510060-00002 PUBMED:https://pubmed.ncbi.nlm.nih.gov/2866055
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)