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Patient Newsletter

Inflammatory Bowel Disease and Restroom Access
by David T. Rubin, MD

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Advancing Treatment in Gastroenterology

Salix Pharmaceuticals is a specialty pharmaceutical company that offers groundbreaking gastroenterology treatments.

We are committed to licensing, developing, and marketing innovative products to treat gastroenterology problems as well as patient-friendly medicines that prepare patients for a more tolerable colonoscopy experience. It’s our mission to give healthcare providers and patients the most effective solutions in gastroenterology.

While we see the gastrointestinal health of patients as paramount, our mission as a corporation is to provide rewarding opportunities to all of our employees and deliver exceptional value to all of our stockholders. From our corporate office in Morrisville, North Carolina, we license, develop, and market innovative products such as APRISO, XIFAXAN, OSMOPREP, MOVIPREP and METOZOLV to US healthcare providers.

Please browse the menu on the left to learn more about our mission and company strategy, our line of gastroenterology treatments, research and development, investor information, partnership and licensing, and career opportunities with Salix.


APRISO™ is a locally-acting aminosalicylate indicated for the maintenance of remission of ulcerative colitis in patients 18 years and older. APRISO is contraindicated in patients with hypersensitivity to salicylates, aminosalicylates, or to any of the components of APRISO capsules. The recommended dose of APRISO is four 0.375 g capsules once daily in the morning (1.5 g/day) with or without food. Because dissolution of the coating of APRISO granules depends on pH, APRISO should not be coadministered with antacids. Patients with phenylketonuria should be aware that APRISO contains aspartame, equivalent to 0.56 mg of phenylalanine. In two well-controlled clinical trials, the most common treatment-related adverse events occurring in at least 3% of adult patients taking 1.5 g/day of APRISO were headache (11% vs. 8% for placebo), diarrhea (8% vs. 7% for placebo), upper abdominal pain (5% vs 3% for placebo), nausea (4% vs 3% for placebo), nasopharyngitis (4% vs 3% for placebo), influenza and influenza-like illness (4% vs 4% for placebo) and sinusitis (3% vs 3% for placebo).

For complete Prescribing Information, please click here.


Important Safety Information about METOZOLV ODT

Treatment with metoclopramide can cause tardive dyskinesia, a serious movement disorder that is often irreversible. The risk of developing tardive dyskinesia increases with the duration of treatment and the total cumulative dose.
Metoclopramide therapy should be discontinued in patients who develop signs or symptoms of tardive dyskinesia. There is no known treatment for tardive dyskinesia. In some patients, symptoms may lessen or resolve after metoclopramide treatment is stopped.
Treatment with metoclopramide for longer than 12 weeks should be avoided in all but rare cases where therapeutic benefit is thought to outweigh the risk of developing tardive dyskinesia.

METOZOLV® ODT (metoclopramide HCl) is indicated as short-term (4 to 12 weeks) therapy for adults with symptomatic, documented gastroesophageal reflux disease (GERD) who fail to respond to conventional therapy and for the relief of symptoms associated with acute and recurrent diabetic gastroparesis (diabetic gastric stasis) in adults. Therapy should not exceed 12 weeks in duration. Take on an empty stomach up to four times daily, at least 30 minutes before eating and at bedtime.

METOZOLV ODT is contraindicated in patients with intestinal obstruction, hemorrhage, or perforation; pheochromocytoma; known sensitivity or intolerance to metoclopramide; epilepsy; or are receiving concomitant medications with extrapyramidal reactions.

Extrapyramidal symptoms (EPS), manifested primarily as acute dystonic reactions, occur in approximately 1 in 500 patients treated with the usual adult dosages of 30 to 40 mg/day of metoclopramide. These usually are seen during the first 24 to 48 hours of treatment with metoclopramide, occur more frequently in pediatric patients and adult patients less than 30 years of age and are even more frequent at higher doses.

Drug-induced Parkinsonism can occur during metoclopramide therapy, more commonly within the first 6 months after beginning treatment, but also after longer periods. Patients with a history of Parkinson’s disease should be given metoclopramide cautiously, if at all, since such patients can experience exacerbation of Parkinsonian symptoms when taking metoclopramide.

There have been rare reports of an uncommon but potentially fatal symptom complex sometimes referred to as Neuroleptic Malignant Syndrome (NMS) associated with metoclopramide. Clinical manifestations of NMS include hyperthermia, muscle rigidity, altered consciousness, and evidence of autonomic instability. The management of NMS should include immediate discontinuation of metoclopramide and other drugs not essential to concurrent therapy.

Depression associated with metoclopramide use has occurred in patients with and without a history of depression. For those patients with a prior history of depression, metoclopramide should only be given if the expected benefits outweigh the potential risks.

In one study in hypertensive patients, intravenously administered metoclopramide was shown to release catecholamines; hence, caution should be exercised when metoclopramide is used in patients with hypertension. Any rapid rise in blood pressure associated with METOZOLV ODT use should result in immediate cessation of metoclopramide use in those patients.

Since metoclopramide produces a transient increase in plasma aldosterone, patients with cirrhosis or congestive heart failure may be at risk of developing fluid retention and volume overload. If these side effects occur at any time in any patients during metoclopramide therapy, the drug should be discontinued.

Adverse reactions, especially those involving the nervous system, may occur after stopping the use of METOZOLV ODT.

In clinical studies, the most frequently reported adverse events (≥2% occurrence) were headache, nausea, fatigue, somnolence, and vomiting.

Full Prescribing Information for METOZOLV ODT, including BOXED WARNING.


MOVIPREP® (PEG-3350, sodium sulfate, sodium chloride, potassium chloride, sodium ascorbate and ascorbic acid for oral solution) is indicated for cleansing of the colon as a preparation for colonoscopy in adults 18 years of age or older. MOVIPREP is contraindicated in patients who have had a severe hypersensitivity reaction to any of its components. MOVIPREP should be used with caution in patients using concomitant medications that increase the risk of electrolyte abnormalities, in patients with known or suspected hyponatremia, severe ulcerative colitis, ileus, gastrointestinal obstruction or perforation, gastric retention, toxic colitis, toxic megacolon, or glucose-6-phosphate dehydrogenase deficiency. In clinical trials, abdominal distention, anal discomfort, thirst, nausea, and abdominal pain were the most common adverse reactions to MOVIPREP administration. MOVIPREP contains a maximum of 2.33 mg of phenylalanine per treatment.

Consult with your physician to see if this product is right for you.

For complete Prescribing Information, please click here.


Important Safety Information about OSMOPREP

There have been rare, but serious reports of acute phosphate nephropathy in patients who received oral sodium phosphate products for colon cleansing prior to colonoscopy. Some cases have resulted in permanent impairment of renal function and some patients required long–term dialysis. While some cases have occurred in patients without identifiable risk factors, patients at increased risk of acute phosphate nephropathy may include those with increased age, hypovolemia, increased bowel transit time (such as bowel obstruction), active colitis, or baseline kidney disease, and those using medicines that affect renal perfusion or function (such as diuretics, angiotensin converting enzyme [ACE] inhibitors, angiotensin receptor blockers [ARBs], and possibly nonsteroidal anti–inflammatory drugs [NSAIDs]).

It is important to use the dose and dosing regimen as recommended (PM/AM split dose).

OSMOPREP® (sodium phosphate monobasic monohydrate, USP, and sodium phosphate dibasic anhydrous, USP) Tablets are indicated for cleansing of the colon as a preparation for colonoscopy in adults 18 years of age or older. Considerable caution should be advised before OSMOPREP is used in patients with severe renal insufficiency, congestive heart failure, ascites, unstable angina, gastric retention, ileus, severe chronic constipation, bowel perforation, toxic megacolon, gastric bypass or stapling surgery, or hypomotility syndrome. Use with caution in patients with impaired renal function, patients with a history of seizures or at higher risk of seizure, patients with higher risk of cardiac arrhythmias, known or suspected electrolyte disturbances (such as dehydration), or people taking drugs that affect electrolyte levels. Patients with electrolyte abnormalities such as hypernatremia, hyperphosphatemia, hypokalemia, or hypocalcemia should have their electrolytes corrected before treatment with OSMOPREP.

OSMOPREP is contraindicated in patients with a known allergy or hypersensitivity to sodium phosphate salts or any of its ingredients, and in patients with biopsy–proven acute phosphate nephropathy. In clinical trials, the most commonly reported adverse reactions (reporting frequency >3%) were abdominal bloating, nausea, abdominal pain, and vomiting. It is recommended that patients receiving OSMOPREP be advised to adequately hydrate before, during, and after the use of OsmoPrep.

For complete Prescribing Information for OSMOPREP including BOXED WARNING, please click here.


Important Safety Information about XIFAXAN 200 mg

XIFAXAN® (rifaximin) 200 mg Tablets are indicated for the treatment of patients (≥12 years of age) with travelers’ diarrhea caused by noninvasive strains of Escherichia coli. XIFAXAN should not be used in patients with diarrhea complicated by fever or blood in the stool or diarrhea due to pathogens other than E coli. XIFAXAN should be discontinued if diarrhea symptoms get worse or persist more than 24 to 48 hours and alternative antibiotic therapy should be considered. E coli has been shown to develop resistance to rifaximin in vitro. However, the clinical significance of such an effect has not been studied.

In clinical trials, XIFAXAN was generally well tolerated. The most common side effects (vs placebo) were flatulence 11.3% (vs 19.7%), headache 9.7% (vs 9.2%), abdominal pain 7.2% (vs 10.1%), rectal tenesmus 7.2% (vs 8.8%), defecation urgency 5.9% (vs 9.2%), and nausea 5.3% (vs 8.3%).

For complete Prescribing Information, please click here.


Important Safety Information about XIFAXAN 550 mg

XIFAXAN® 550 mg is indicated for reduction in risk of overt hepatic encephalopathy (HE) recurrence in patients ≥18 years of age. In the trials of XIFAXAN for HE, 91% of the patients were using lactulose concomitantly. XIFAXAN has not been studied in patients with MELD scores >25, and only 8.6% of patients in the controlled trial had MELD scores over 19. There is increased systemic exposure in patients with more severe hepatic dysfunction. Therefore, caution should be exercised when administering XIFAXAN to patients with severe hepatic impairment (Child-Pugh C).

XIFAXAN is contraindicated in patients with a hypersensitivity to rifaximin, any of the rifamycin antimicrobial agents, or any of the components in XIFAXAN. Hypersensitivity reactions have included exfoliative dermatitis, angioneurotic edema, and anaphylaxis.

Clostridium difficile–associated diarrhea (CDAD) has been reported with use of nearly all antibacterial agents, including XIFAXAN, and may range in severity from mild diarrhea to fatal colitis. Treatment with antibacterial agents alters the normal flora of the colon which may lead to overgrowth of C difficile. If CDAD is suspected or confirmed, ongoing antibiotic use not directed against C difficile may need to be discontinued.

The most common adverse reactions occurring in >8% of patients in the clinical study were edema peripheral (15%), nausea (14%), dizziness (13%), fatigue (12%), ascites (11%), muscle spasms (9%), pruritus (9%), and abdominal pain (9%).

For complete Prescribing Information, please click here.