GI Flashcards
Indications for __________:
dyspepsia (heartburn), mild GERD and PUD
Antacids (Aluminum, Calcium, Sodium, and Magnesium- based)
MOA of __________:
*neutralize hydrochloric acid in the stomach, thereby increasing gastric pH > 4
*weak bases that react w/ HCl to form water and salt
*lasts 20-40 mins on empty stomach and 2-3 hrs on full stomach
Antacids (Aluminum, Calcium, Sodium, and Magnesium- based)
Safety Considerations/SE of ____________:
Warfarin (Coumadin)- may reduce absorption
Constipation
Aluminum-Based Antacids
Contraindications of __________:
Patients w/ renal insufficiency (high aluminum levels deposit in bone → osteomalacia)
Aluminum-Based Antacids
Special Note about _________:
Be sure to separate from other medications by 2 hours
Antacids
Example of Aluminum-Based Antacid
Aluminum Hydroxide- Amphogel
Contraindications of __________:
Patients w/ renal calculi
Calcium-Based Antacids
SE/Interactions of ________:
Constipation
Calcium-Based Antacids
Special Note about _________:
Used in calcium deficiency (w/ vit D)
Calcium-Based Antacids
Examples of Calcium-Based Antacids
Calcium Carbonate-Tums®, Rolaids®
Contraindications of __________:
Patients with cardiovascular disease (HTN)
Avoid in Pregnancy
Sodium-Based Antacids
SE/Interactions of ________:
May contribute to hypertension
Sodium-Based Antacids
Avoid ________ in patients with severe abdominal pain of unknown origin.
Antacids
SE of ________:
Diarrhea
Magnesium-Based Antacids
Contraindications of __________:
Patients w/ renal insufficiency (unable to excrete Mg → hypermagnesemia)
Magnesium-Based Antacids
All ________ increase or decrease absorption/SE of other drugs and increase absorption/SE of enteric coated drugs.
Antacids
Special Note about _________:
Used in Mg deficiency
Magnesium-Based Antacids
Example of Sodium-Based Antacids
Sodium Bicarbonate(Alka Seltzer®)
Example of Magnesium-Based Antacids
Magnesium Hydroxide(Milk of Magnesia®)
Do not take ______ with Iron or PNV
Antacids
H2RA (Histamine Receptor Agonists) Examples
cimetidine (Tagamet)
ranitidine (Zantac)
famotidine (Pepcid)
Indications for __________:
Heartburn
Prevents gastric/duodenal ulcers after one has healed
GERD after PPI therapy
H2RA (Histamine Receptor Agonists)
MOA of _________:
Inhibit acid secretion by gastric parietal cells by blocking H2 receptors
-Certain drugs in this class may affect gastric emptying and lower esophageal sphincter pressure also
H2RA (Histamine Receptor Agonists)
Safety Consideration for __________:
metabolized by CYP450 enzyme system in liver → increased concentration of other drugs metabolized by CYP450
Caution in patients w/ renal impairment (CNS adverse reactions)
Caution in older adults
H2RA (Histamine Receptor Agonists)