Pharamacology Reviewer .2 Flashcards
- effects of the body on the drug
- how the body handle the drug
- movement of drug within the body
Pharmacokinetics
What are the processes or components of Pharmacokinetics?
- Absorption
- Distribution
- Metabolism or Biotransformation
- Excretion
- it is the process by which drug passess from its site of administration into the bloodstream (Pk factors in Drug therapy)
Absorption
- it requires a concentration gradient across the membrane
- occurs mostly by diffusion
- the drug does not require energy to move across the membrane
Passive diffusion
- it requires a carrier system
- works against a concentration agent
- requires the use of ATP
Active diffusion
- it is a process by which cells carry a drug across their membrane by engulfing the drug particles
Pinocytosis
Factors that affect Drug Absorption
- Physiochemical Properties
- Physiologic Variable
Taken by mouth
Orally
Given by injection into a vein
Intravenously, IV
into a muscle
Intramascularly, IM
into the space around the spinal cord
Intrathecally
beneath the skin
Subcutaneously, SC
Placed under the tongue
Sublingually
Between the gums and cheeks
Bucally
Inserted in the rectum
Rectally
Inserted in the vagina
Vaginally
Placed in the eye
by the ocular route
Place in the ear
by the otic route
Sprayed into the nose and absorbed through the nasal membranes
Nasally
Breathed into the lungs, usually through the mouth
Inhalation
Breathed into the lungs, usually through the mouth and nose
Nebulization
Applied to the skin
Cutaneous