Categories: All - contraindications - management - pharmacodynamics - pharmacokinetics

by Samantha Schneider 12 years ago

548

Omeprazole

Omeprazole, a proton pump inhibitor (PPI), is used to decrease gastric acid production by inhibiting the final phase of acid secretion within the stomach. It works regardless of the stimulus by selectively and irreversibly inhibiting the proton pump.

Omeprazole

Proton Pump Inhibitor (PPI) OMEPRAZOLE Used to decrease gastric acid production

Pharmacotherapeutics

Ulcers associated with H. pylori
GERD
Heartburn

Pharmacokinetics

Best absorped in the smal intestine
Metabolized through P-450 system
Half life = < 2 hrs
High first pass effect
Highly protein bound
Food effects the absorption rate, but does not effect the extent of absorption

Pharmacodynamics

Increases gastric pH
Inhibits both basal and stimulated acid secretion irrespective of the stimulus
Inhibits the final phase of gastric acid production through supression of the parietal H +, K + ATPase system
Selectively and irreversibly inhibits the proton pump

Core Patient Variable

Asians have a longer duration of action
Pregnancy
Note the pt.'s age: - Efficacy and safety in children not established - Elderly must be screened for bone density

Nursing Management

Screen for pregnancy
Teach pt. to not chew or crush pills
Screen for sensitivity to Omeprazole
Instruct patient to take dose prior to eating

Contraindications

Pregnancy category C
Hypersensitivity to the drug's components
Breastfeeding

Major Adverse Effects

Increased risk for C. diff infection
Dizziness
Nausea
Osteoporosis
Headache