Absorption Flashcards
Tmax
Time that it takes to reach Cmax
Two main routes of administration
Enteral and Parenteral
Factors related to the animal that affect absorption
Blood flow
Absorbing surface area
Connective tissue
Species
Individual variation
Fasted vs Fed
Transdermal Administration
Applied topically to have systemic effect
Often the rate limiting step controlling absorption
Dissolution
Absorption
Movement of the drug from the site of administration into the blood
Rate of absorption is determined by
Rate of absorption is determined by gastric emptying time
In animals that are unable to take oral medications, sometimes they are given
In animals that are unable to take oral medications, sometimes they are given rectally
Excipient
What a drug is compounded with
Sublingual absportion bypasses the
Sublingual absportion bypasses the portal vein
Factors related to the drug that affect absorption
Molecular Size
Disintegration and Dissolution
Lipid Solubility
Degree of Ionization
Concentration at the absorptive site
Route of administration
With respiratory administration the (upper/lower) respiratory tract is best for systemic absorption.
With respiratory administration the (upper/lower) respiratory tract is best for systemic absorption.
Parenteral Drug Administration Routes
IV
IM
SQ
IP
Disintegration
Physical dispersion of a soild dosage form
Drugs that absorb well when given buccal/sublingual
Dormoseden
Buprenorphine
Dissolution
Drug molecules enter solution
Rate limiting step of transdermal administration
Stratum corneum
First Pass Metabolism
Drugs absorbed distal to the oral cavity and proximal to the rectum enter the portal vein and then into the liver where biotransformation may occur
Topical drugs are generally intended to have (high/low) absorption into systemic system
Topical drugs are generally intended to have (high/low) absorption into systemic system
Cmax
Maximum plasma concentration of a drug
Topical Administration
Refers to topicall on the skin to achieve local effects
Does IV administration undergo absorption?
No, its administered directly into the vein
Rectal administration relationship to first pass metabolism
First pass metabolism may be reduced
Primary site for drug absorption
Small intestine