Week 4: GI products Flashcards
What is the main symptom of GERD?
Heartburn
What is heartburn?
Burning sensation in the stomach
What medications can cause heart burn?
- Potassium
- Iron
- NSAIDs
When would we exclude self treatment for heart burn?
- Frequent heartburn for more than 3 months
- While taking H2RA or PPI
- 2 weeks or while taking H2RA or PPI
- Difficulty or pain on swallowing
- Vomiting up blood/black tarry stool
- Weight loss
- Nausea, vomiting, or diarrhea
- Children
- Chest pain with sweating
- 45 YO adults with indigestion
What are the treatment goals for heart burn?
- Complete relief of symptoms
- Reduce recurrence of symptoms
- Prevent/manage unwanted effects of medication
Non pharm treatments of heartburn?
- Weight loss
- Non smoking
- Time
- Elevated sleeping
- Journal diet
What are the pharm treatments for heart burn?
- Antacids
- H2RAs
- H2RA + antacid
- PPI
What are antacids?
- Neutralizes gastric acid
- Liquid form has a faster onset
- Reevaluate if needing more than twice a week
- Most eliminated renal
What should be avoided when taking antacids?
Amphetamines
What should be avoided when taking sodium bicarbonate?
- Quinidine
- Salicylates (decreases salicylate response)
What are histamine receptor antagonists?
- Decrease gastric secretion by blocking histamine receptors of parietal cells
- Well tolerated
- As needed drug and prevention
- Effective in relieving fasting and nocturnal symptoms
- Eliminated by a combination of renal (most important) and hepatic metabolism
What are the side effects of H2RAs?
Headache, diarrhea, constipation, dizziness, drowsiness
What should you do when taking Antacids, H2RAs, or PPIs?
Don’t take concurrently with antineoplastics, TKIs/
separate from antacids by several hours
What should you avoid when taking H2RAs and PPIs?
Avoid taking with Concurrent Itraconazole, ketoconazole, atazanavir, iron sulfate, calcium carbonate therapy
What is important to know about cimetidine?
Avoid use of cimetidine in patients taking medications metabolized by CYP enzymes
What happens if you take citalopram with cimetidine or PPIs?
Citalopram dose should not exceed 20 mg per day if not used concomitantly
What is a PPI?
- Inhibit hydrogen potassium ATPase, irreversibly blocking the final step in gastric acid secretion
- Increased bioavailability when daily dosing but reduced after a meal
- Relief takes 1-4 days
What are adverse effects of PPIs?
Headache, abdominal pain, diarrhea, constipation, or flatulence
What should we do about taking PPIs with Warfarin, theophylline, tacrolimus, mycophenolate, or mofetil?
Avoid concurrent use of check prescriber
What should we do when taking PPIs with digoxin?
Check with prescriber before use
What should we do when taking PPIs with methotrexate?
Avoid concurrent use of high dose methotrexate
Significant toxicity is unlikely with lower weekly doses
What are the preventative measures of taking omeprazole and esomeprazole with clopidogrel?
Avoid concurrent use, clinically significant interaction is unlikely
What is the preventative measure of taking omeprazole and esomeprazole with cilostazol or diazepam?
Avoid concurrent use
Lansoprazole may be a safer alternative
What are the disadvantages of bismuth subsalicylate?
- Not recommended for children and be avoided in patient with salicylate sensitivity or bleeding risks
- Risk of Reyes syndrome in children
- black stool and tongue
What heat burn product is compatible with pregnancy?
H2RAs
Calcium and magnesium antacids
What heat burn product is compatible with lactation?
Cimetidine and Famotidine
Aluminum-, calcium-, or magnesium-containing antacids
What heat burn product is recommended for pediatrics with GI problems?
Lifestyle modifications
Antacids
58 y/o male with known heartburn controlled with lifestyle modifications. Friends invited him out to local chili cook-off, and he seeks advice on preventing symptoms.
What do you recommend and why?
PRN H2RA (as needed and preventative treatment)
46 y/o mother of 2 with a new job complains of moderate heartburn symptoms 3-4 times per week. What do you recommend and why?
- Daily PPI
- PRN H2RA
- Lifestyle mod
54 y/o male presents complaining of severe heartburn, pounding in his chest. He appears pale, weak, diaphoretic, short of breath. Recommendation?
Refer
What is constipation?
Occurrence of fewer than 3 bowel movements per week accompanied by straining and difficult passage of hard, dry stools
What is primary constipation?
Slower than normal GI transit time or a defecatory disorder
What is secondary constipation?
Systemic, neurologic, and psychological disorders and/or structural abnormalities
What might contribute to constipation?
Inadequate dietary fiber and fluid intake
What are drugs that induce constipation?
- Analgesics
- Anatacids
- Opiates
- NSAIDs
What are the treatment goals for constipation?
- Relieve and reestablish
- Establish dietary and exercise habits
- Safe and effective use of laxatives
What are the exclusions for self-treatment for constipation?
- Abdominal pain and significant distension
- Fever
- Nausea/vomiting
- Unexplained flatulence
- Chronic conditions
- Daily laxative use
- Age
- Abnormal stool
- Persistant greater than 2 weeks or over 3 months
What are the non pharm treatments for constipation?
- Gradual increase in fiber, 25g/day for women and 38g for men
- Increase fluid intake 8-8 ounce glasses/day with added fibers
- Physical activity
- Bowel training: attempting after waking and 30 minutes after meals
What are bulk-forming agents?
- Contains methylcellulose, polycarbophil, and psyllium
- Onset of 12-24 hrs but delayed to 72 hrs
- Absorb fluid from intestine, swell to form soft, bulky stool
What are the adverse effects of bulking forming agents?
- Abdominal cramping and flatulence
- Avoid in patients with difficulty swallowing, or esophageal structures, intestinal ulcerations, stenosis
- Avoid in patients who are fluid restricted
- Councel patients to take in adequate fluids
What are the hyperosmotic agents?
- PEG 3350
- Glycerin
What do hyperosmotics do?
- Draw water into the colon or rectum through osmosis to stimulate a bowel movement
- Onset 12-72hr, can take up to 96hr