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adverse reactions
6 ADVERSE REACTIONS Most common adverse reactions in adults (incidence ≥3% are headache, abdominal pain, diarrhea, nausea, vomiting, respiratory infection, and arthralgia. Adverse reactions in children were similar. (6.1) To report SUSPECTED ADVERSE REACTIONS, contact Roxane Laboratories, Inc. at 1-800-962-8364 or FDA at 1-800-FDA-1088 or www.fda.gov/medwatch. 6.1 Clinical Studies Experience Because clinical studies are conducted under widely varying conditions, adverse reaction rates observed in the clinical studies of a drug cannot be directly compared to rates in the clinical studies of another drug and may not reflect the rates observed in practice. Adult Ulcerative Colitis During clinical development, 259 adult patients with active ulcerative colitis were exposed to 6.75 g/day balsalazide in 4 controlled trials. In the 4 controlled clinical trials patients receiving a balsalazide dose of 6.75 g/day most frequently reported the following adverse reactions: headache (8%), abdominal pain (6%), diarrhea (5%), nausea (5%), vomiting (4%), respiratory infection (4%), and arthralgia (4%). Withdrawal from therapy due to adverse reactions was comparable among patients on balsalazide and placebo. Adverse reactions reported by 1% or more of patients who participated in the 4 well-controlled, Phase 3 trials are presented by treatment group (Table 1). The number of placebo patients (35), however, is too small for valid comparisons. Some adverse reactions, such as abdominal pain, fatigue, and nausea were reported more frequently in women than in men. Abdominal pain, rectal bleeding, and anemia can be part of the clinical presentation of ulcerative colitis. Table 1: Adverse Reactions Occurring In ≥ 1% of Adult Balsalazide Patients In Controlled Trials Adverse reactions occurring in at least 1% of balsalazide patients which were less frequent than placebo for the same event were not included in the table. Adverse Reaction Balsalazide 6.75 g/day (N=259) Placebo (N=35) Abdominal Pain 16 (6%) 1 (3%) Diarrhea 14 (5%) 1 (3%) Arthralgia 9 (4%) 0% Rhinitis 6 (2%) 0% Insomnia 6 (2%) 0% Fatigue 6 (2%) 0% Flatulence 5 (2%) 0% Fever 5 (2%) 0% Dyspepsia 5 (2%) 0% Pharyngitis 4 (2%) 0% Coughing 4 (2%) 0% Anorexia 4 (2%) 0% Urinary Tract Infection 3 (1%) 0% Myalgia 3 (1%) 0% Flu-Like Disorder 3 (1%) 0% Dry Mouth 3 (1%) 0% Cramps 3 (1%) 0% Constipation 3 (1%) 0% 6.2 Postmarketing Experience The following adverse reactions have been identified during post-approval use of balsalazide in clinical practice: myocarditis, pericarditis, vasculitis, pruritus, pleural effusion, pneumonia (with and without eosinophilia), alveolitis, renal failure,interstitial nephritis, pancreatitis, and alopecia. Because these reactions are reported voluntarily from a population of unknown size, it is not always possible to reliably estimate their frequency or establish a causal relationship to drug exposure. These adverse reactions have been chosen for inclusion due to a combination of seriousness, frequency of reporting, or potential causal connection to balsalazide.Because these reactions are reported voluntarily from a population of unknown size, it is not always possible to reliably estimate their frequency or establish a causal relationship to drug exposure. These adverse reactions have been chosen for inclusion due to a combination of seriousness, frequency of reporting, or potential causal connection to balsalazide. Hepatic Postmarketing adverse reactions of hepatotoxicity have been reported, including elevated liver function tests (SGOT/AST, SGPT/ALT, GGT, LDH, alkaline phosphatase, bilirubin), jaundice, cholestatic jaundice, cirrhosis, hepatocellular damage including liver necrosis and liver failure. Some of these cases were fatal; however, no fatalities associated with these adverse reactions were reported in balsalazide clinical trials. One case of Kawasaki-like syndrome which included hepatic function changes was also reported, however, this adverse reaction was not reported in balsalazide clinical trials.