NUT2103 Lecture Notes - Acid Dissociation Constant, Carambola, Reabsorption
- Therapeutic Range of Drug plasma concentration achieved
- => Administration Route / Starting Dose / Drug Administration Frequency
- Prevents Adverse effects [Dose-dependent drugs]
- Avoid drug interactions
- Overdose Treatment & Management [ Multiple medications taken simultaneously]
EFFICACY, NO TOXICITY
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Explain the factors affecting the movement of
drug into, around and out of the body
1. ORAL BIO-AVAILABILITY
- Drug
• pH / Pka
• Size
• Susceptibility [ Gut & Liver Enzymes Breakdown ]
- Patients
• Food Presence & Type
o Influence Drug Absorption
• Gastric Motility
• Blood Flow
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2. DISTRIBUTION around body
- Movement Ease out of Vasculature
• Size
• Liphophilicity
• Ionization Degree [pKa / PH]
• Bind Plasma Proteins
o > Molecules Size = <Diffusion
o Albumin
o Confine to Vascular compartment = CANNOT Interact with Target
o Plasma’s Total Drug Concentration = Bound + Free
- Efficacy of delivery to tissues
• Particular regions’ Blood Flow
- “Held” within Tissues?
• Bind to Extra-Vascular sites
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Document Summary
Therapeutic range of drug plasma concentration achieved. => administration route / starting dose / drug administration frequency. Explain the factors affecting the movement of drug into, around and out of the body: oral bio-availability. Drug: ph / pka, size, susceptibility [ gut & liver enzymes breakdown ] Patients: food presence & type, influence drug absorption, gastric motility, blood flow, distribution around body. Efficacy of delivery to tissues: particular regions" blood flow. Held within tissues: bind to extra-vascular sites. = drug appears to be distributed [concentration = plasma"s : > compartments distributed = < plasma"s, vol. Elimination: re-distribution via circulation [removed action site, brain => (lower resting blood flow)tissues [re-distribution] = intra-venous sedative"s effects : cleared from plasma, kidneys. Metabolism: intra-cellular, kidney, intestine, liphophilic drugs [crosses plasma membrane, liver, oral absorption, portal circulation, lipid-soluble => h2o-soluble, excretion [kidneys, catabolic, oxidation/ reduction/ hydrolysis = >polarity [ionizable group added] = >h2o-soluble: reactive group produced, synthetic, [metabolite (inactive) + endogenous molecules]/ drugs.