Polyethylene Glycol 3350, Sodium Sulfate Anhydrous, Sodium Bicarbonate, Sodium Chloride, Potassium Chloride

5 WARNINGS AND PRECAUTIONS Risk of fluid and electrolyte abnormalities: Encourage adequate hydration, assess concurrent medications, and consider laboratory assessments prior to and after use. ( 5.1 , 5.2 , 7.1 ) Cardiac arrhythmias: Consider pre-dose and post-colonoscopy ECGs in patients at increased risk of serious cardiac arrhythmias. ( 5.2 ) Seizures: Use caution in patients with a history of seizures and patients at increased risk of seizure, including medications that lower the seizure threshold. ( 5.3 , 7.1 ) Patients with renal impairment or taking concomitant medications that affect renal function: Use caution, ensure adequate hydration and consider testing. ( 5.4 , 7.1 , 8.6 ) Mucosal ulcerations: Consider potential for mucosal ulcerations when interpreting colonoscopy findings in patients with known or suspected inflammatory bowel disease. ( 5.5 , 7.3 ) Patients at risk for aspiration: Observe during administration. ( 5.7 ) Hypersensitivity reactions including anaphylaxis: Inform patients to seek immediate medical care if symptoms occur. ( 5.8 ) 5.1 Serious Fluid and Serum Chemistry Abnormalities Advise patients to hydrate adequately before, during, and after the use of PEG-3350 and Electrolytes for Oral Solution. Use caution in patients with congestive heart failure when replacing fluids. If a patient develops significant vomiting or signs of dehydration including signs of orthostatic hypotension after taking PEG-3350 and Electrolytes for Oral Solution, consider performing post-colonoscopy lab tests (electrolytes, creatinine, and BUN) and treat accordingly. Fluid and electrolyte disturbances can lead to serious adverse events including cardiac arrhythmias, seizures and renal impairment. Correct fluid and electrolyte abnormalities before treatment with PEG-3350 and Electrolytes for Oral Solution. In addition, use caution when prescribing PEG-3350 and Electrolytes for Oral Solution for patients who have conditions, or who are using medications, that increase the risk for fluid and electrolyte disturbances or may increase the risk of adverse events of seizure, arrhythmias, and renal impairment [see Drug Interactions ( 7.1 )] . 5.2 Cardiac Arrhythmias There have been rare reports of serious arrhythmias associated with the use of ionic osmotic laxative products for bowel preparation. Use caution when prescribing PEG-3350 and Electrolytes for Oral Solution for patients at increased risk of arrhythmias (e.g., patients with a history of prolonged QT, uncontrolled arrhythmias, recent myocardial infarction, unstable angina, congestive heart failure, or cardiomyopathy). Consider pre-dose and post-colonoscopy ECGs in patients at increased risk of serious cardiac arrhythmias. 5.3 Seizures There have been reports of generalized tonic-clonic seizures and/or loss of consciousness associated with use of bowel preparation products in patients with no prior history of seizures. The seizure cases were associated with electrolyte abnormalities (e.g., hyponatremia, hypokalemia, hypocalcemia, and hypomagnesemia) and low serum osmolality. The neurologic abnormalities resolved with correction of fluid and electrolyte abnormalities. Use caution when prescribing PEG-3350 and Electrolytes for Oral Solution for patients with a history of seizures and in patients at increased risk of seizure, such as patients taking medications that lower the seizure threshold (e.g., tricyclic antidepressants), patients withdrawing from alcohol or benzodiazepines, or patients with known or suspected hyponatremia [see Drug Interactions ( 7.1 )] . 5.4 Renal Impairment Use caution when prescribing PEG-3350 and Electrolytes for Oral Solution for patients with impaired renal function or patients taking concomitant medications that may affect renal function (such as diuretics, angiotensin converting enzyme inhibitors, angiotensin receptor blockers, or non-steroidal anti-inflammatory drugs) [see Drug Interactions ( 7.1 )] . Advise these patients of the importance of adequate hydration and consider performing baseline and post-colonoscopy laboratory tests (electrolytes, creatinine, and BUN) in these patients [see Use in Specific Populations ( 8.6 )] . 5.5 Colonic Mucosal Ulcerations and Ischemic Colitis Administration of osmotic laxative products may produce colonic mucosal aphthous ulcerations, and there have been reports of more serious cases of ischemic colitis requiring hospitalization. Concurrent use of stimulant laxatives and PEG-3350 and Electrolytes for Oral Solution may increase this risk [see Drug Interactions ( 7.3 )] . Consider the potential for mucosal ulcerations resulting from the bowel preparation when interpreting colonoscopy findings in patients with known or suspect inflammatory bowel disease (IBD). 5.6 Use in Patients with Significant Gastrointestinal Disease If gastrointestinal obstruction or perforation is suspected, perform appropriate diagnostic studies to rule out these conditions before administering PEG-3350 and Electrolytes for Oral Solution [see Contraindications ( 4 )] . Use with caution in patients with severe active ulcerative colitis. 5.7 Aspiration Use with caution in patients with impaired gag reflex, unconscious, or semiconscious patients, and patients prone to regurgitation or aspiration. Observe these patients during administration of PEG-3350 and Electrolytes for Oral Solution, especially if it is administered via nasogastric tube. Do not combine PEG-3350 and Electrolytes for Oral Solution with starch-based thickeners [see Dosage and Administration ( 2.1 )] . Polyethylene glycol (PEG), a component of PEG-3350 and Electrolytes for Oral Solution, when mixed with starch-thickened liquids reduces the viscosity of the starch-thickened liquid. When a PEG-based product used for another indication was mixed in starch-based pre-thickened liquids used in patients with dysphagia, thinning of the liquid occurred and cases of choking and potential aspiration were reported. 5.8 Hypersensitivity Reactions PEG-3350 and Electrolytes for Oral Solution contains PEG and may cause serious hypersensitivity reactions including anaphylaxis, angioedema, rash, urticaria, and pruritus [see Adverse Reactions ( 6 )] . Inform patients of the signs and symptoms of anaphylaxis and instruct them to seek immediate medical care should signs and symptoms occur.