Mycophenolic acid

1 INDICATIONS AND USAGE Mycophenolic acid delayed-release tablets are an antimetabolite immunosuppressant indicated for prophylaxis of organ rejection in adult patients receiving kidney transplants and in pediatric patients at least 5 years of age and older who are at least 6 months post kidney transplant. (1.1) Use in combination with cyclosporine and corticosteroids. (1.1) Limitations of Use: Mycophenolic acid delayed release tablets and mycophenolate mofetil tablets and capsules should not be used interchangeably. (1.2) 1.1 Prophylaxis of Organ Rejection in Kidney Transplant Mycophenolic acid are indicated for the prophylaxis of organ rejection in adult patients receiving a kidney transplant. Mycophenolic acid are indicated for the prophylaxis of organ rejection in pediatric patients 5 years of age and older who are at least 6 months post kidney transplant. Mycophenolic acid are to be used in combination with cyclosporine and corticosteroids. 1.2 Limitations of Use Mycophenolic acid delayed-release tablets and mycophenolate mofetil (MMF) tablets and capsules should not be used interchangeably without physician supervision because the rate of absorption following the administration of these two products is not equivalent.

2 DOSAGE AND ADMINISTRATION In adults: 720 mg by mouth, twice daily (1,440 mg total daily dose) on an empty stomach, 1 hour before or 2 hours after food intake. (2.1) In children: 5 years of age and older (who are at least 6 months post kidney transplant), 400 mg/m 2 by mouth, twice daily (up to a maximum of 720 mg twice daily). (2.2) Do not crush, chew, or cut tablet prior to ingestion. (2.3) 2.1 Dosage in Adult Kidney Transplant Patients The recommended dose of mycophenolic acid delayed-release tablets are 720 mg administered twice daily (1,440 mg total daily dose). 2.2 Dosage in Pediatric Kidney Transplant Patients The recommended dose of mycophenolic acid in conversion (at least 6 months post-transplant) pediatric patients age 5 years and older is 400 mg/m 2 body surface area (BSA) administered twice daily (up to a maximum dose of 720 mg administered twice daily). 2.3 Administration Mycophenolic acid delayed-release tablets should be taken on an empty stomach, 1 hour before or 2 hours after food intake [see Clinical Pharmacology (12.3) ]. Mycophenolic acid delayed-release tablets should not be crushed, chewed, or cut prior to ingesting. The tablets should be swallowed whole in order to maintain the integrity of the enteric coating. Pediatric patients with a BSA of 1.19 m 2 to 1.58 m 2 may be dosed either with three mycophenolic acid 180 mg tablets, or one 180 mg tablet plus one 360 mg tablet twice daily (1,080 mg daily dose). Patients with a BSA of > 1.58 m 2 may be dosed either with four mycophenolic acid 180 mg tablets, or two mycophenolic acid 360 mg tablets twice daily (1,440 mg daily dose). Pediatric doses for patients with BSA < 1.19 m 2 cannot be accurately administered using currently available formulations of mycophenolic acid tablets.

6 ADVERSE REACTIONS The following adverse reactions are discussed in greater detail in other sections of the label. Embryo-Fetal Toxicity [see Boxed Warning , Warnings and Precautions (5.1) ] Lymphomas and Other Malignancies [see Boxed Warning , Warnings and Precautions (5.3) ] Serious Infections [see Boxed Warning , Warnings and Precautions (5.4) ] New or Reactivated Viral Infections [see Warnings and Precautions (5.5) ] Blood Dyscrasias, Including Pure Red Cell Aplasia [see Warnings and Precautions (5.6) ] Serious GI Tract Complications [see Warnings and Precautions (5.7) ] Acute Inflammatory Syndrome Associated with Mycophenolate Products [see Warnings and Precautions (5.8) ] Rare Hereditary Deficiencies [see Warnings and Precautions (5.10) ] Most common adverse reactions (≥ 20%): anemia, leukopenia, constipation, nausea, diarrhea, vomiting, dyspepsia, urinary tract infection, CMV infection, insomnia, and postoperative pain. (6.2) To report SUSPECTED ADVERSE REACTIONS, contact Apotex Corp. at 1-800-706-5575 or FDA at 1-800-FDA-1088 or www.fda.gov/medwatch . 6.1 Clinical Studies Experience Because clinical trials are conducted under widely varying conditions, adverse reaction rates observed in the clinical trials of a drug cannot be directly compared to rates in the clinical trials of another drug and may not reflect the rates observed in practice. The data described below derive from two randomized, comparative, active-controlled, double-blind, double-dummy trials in prevention of acute rejection in de novo and converted stable kidney transplant patients. In the de novo trial, patients were administered either mycophenolic acid delayed-release tablets 1.44 grams per day (N = 213) or MMF 2 grams per day (N = 210) within 48 hours post-transplant for 12 months in combination with cyclosporine, USP MODIFIED and corticosteroids. Forty-one percent of patients also received antibody therapy as induction treatment. In the conversion trial, renal transplant patients who were at least 6 months post-transplant and receiving 2 grams per day MMF in combination with cyclosporine USP MODIFIED, with or without corticosteroids for at least two weeks prior to entry in the trial were randomized to mycophenolic acid delayed-release tablets 1.44 grams per day (N = 159) or MMF 2 grams per day (N = 163) for 12 months. The average age of patients in both studies was 47 years and 48 years ( de novo study and conversion study, respectively), ranging from 22 to 75 years. Approximately 66% of patients were male; 82% were white, 12% were black, and 6% other races. About 40% of patients were from the United States and 60% from other countries. In the de novo trial, the overall incidence of discontinuation due to adverse reactions was 18% (39/213) and 17% (35/210) in the mycophenolic acid delayed-release tablets and MMF arms, respectively . The most common adverse reactions leading to discontinuation in the mycophenolic acid arm were graft loss (2%), diarrhea (2%), vomiting (1%), renal impairment (1%), CMV infection (1%), and leukopenia (1%). The overall incidence of patients reporting dose reduction at least once during the 0 to 12-month study period was 59% and 60% in the mycophenolic acid delayed-release tablets and MMF arms, respectively. The most frequent reasons for dose reduction in the mycophenolic acid delayed-release tablets arm were adverse reactions (44%), dose reductions according to protocol guidelines (17%), dosing errors (11%) and missing data (2%). The most common adverse reactions (≥ 20%) associated with the administration of mycophenolic acid delayed-release tablets were anemia, leukopenia, constipation, nausea, diarrhea, vomiting, dyspepsia, urinary tract infection, CMV infection, insomnia, and postoperative pain. The adverse reactions reported in ≥ 10% of patients in the de novo trial are presented in Table 2 below. Table 2: Adverse Reactions (%) Reported in ≥ 10% of de novo Kidney Transplant Patients in Either Treatment Group de novo Renal Trial The trial was not designed to support comparative claims for mycophenolic acid for the adverse reactions reported in this table. System Organ Class Mycophenolic acid delayed-release tablets mycophenolate mofetil (MMF) Adverse drug reactions 1.44 grams per day 2 grams per day (n = 213) (%) (n = 210) (%) Blood and Lymphatic System Disorders Anemia 22 22 Leukopenia 19 21 Gastrointestinal System Disorders Constipation 38 40 Nausea 29 27 Diarrhea 24 25 Vomiting 23 20 Dyspepsia 23 19 Abdominal pain upper 14 14 Flatulence 10 13 General and Administrative Site Disorders Edema 17 18 Edema lower limb 16 17 Pyrexia 13 19 Investigations Increased blood creatinine 15 10 Infections and Infestations Urinary tract infection 29 33 CMV infection 20 18 Metabolism and Nutrition Disorders Hypocalcemia 11 15 Hyperuricemia 13 13 Hyperlipidemia 12 10 Hypokalemia 13 9 Hypophosphatemia 11 9 Musculoskeletal, Connective Tissue & Bone Disorders Back pain 12 6 Arthralgia 7 11 Nervous System Disorder I

7 DRUG INTERACTIONS Antacids with Magnesium and Aluminum Hydroxides: Decreases concentrations of MPA; concomitant use is not recommended. (7.1) Azathioprine: Competition for purine metabolism; concomitant administration is not recommended. (7.2) Cholestyramine, Bile Acid Sequestrates, Oral Activated Charcoal, and Other Drugs that Interfere with Enterohepatic Recirculation: May decrease MPA concentrations; concomitant use is not recommended. (7.3) Sevelamer: May decrease MPA concentrations; concomitant use is not recommended. (7.4) Cyclosporine: May decrease MPA concentrations; exercise caution when switching from cyclosporine to other drugs or from other drugs to cyclosporine. (7.5) Norfloxacin and Metronidazole: May decrease MPA concentrations; concomitant use with both drugs is not recommended. (7.6) Rifampin: May decrease MPA concentrations; concomitant use is not recommended unless the benefit outweighs the risk. (7.7) Hormonal Contraceptives: May reduce the effectiveness of oral contraceptives. Additional barrier contraceptive methods must be used. (5.1 , 7.8) Acyclovir, Valacyclovir, Ganciclovir, Valganciclovir, and Other Drugs that Undergo Renal Tubular Secretion: May increase concentrations of mycophenolic acid glucuronide (MPAG) and coadministered drug; monitor blood cell counts. (7.9) 7.1 Antacids With Magnesium and Aluminum Hydroxides Concomitant use of mycophenolic acid delayed-release tablets and antacids decreased plasma concentrations of mycophenolic acid (MPA). It is recommended that mycophenolic acid delayed-release tablets and antacids not be administered simultaneously [see Clinical Pharmacology (12.3) ]. 7.2 Azathioprine Given that azathioprine and MMF inhibit purine metabolism, it is recommended that mycophenolic acid delayed-release tablets not be administered concomitantly with azathioprine or MMF. 7.3 Cholestyramine, Bile Acid Sequestrates, Oral Activated Charcoal and Other Drugs That Interfere With Enterohepatic Recirculation Drugs that interrupt enterohepatic recirculation may decrease MPA plasma concentrations when coadministered with MMF. Therefore, do not administer mycophenolic acid delayed-release tablets with cholestyramine or other agents that may interfere with enterohepatic recirculation or drugs that may bind bile acids, e.g., bile acid sequestrates or oral activated charcoal, because of the potential to reduce the efficacy of mycophenolic acid delayed-release tablets [see Clinical Pharmacology (12.3) ]. 7.4 Sevelamer Concomitant administration of sevelamer and MMF may decrease MPA plasma concentrations. Sevelamer and other calcium-free phosphate binders should not be administered simultaneously with mycophenolic acid delayed-release tablets [see Clinical Pharmacology (12.3) ]. 7.5 Cyclosporine Cyclosporine inhibits the enterohepatic recirculation of MPA, and therefore, MPA plasma concentrations may be decreased when mycophenolic acid delayed-release tablets are coadministered with cyclosporine. Clinicians should be aware that there is also a potential change of MPA plasma concentrations after switching from cyclosporine to other immunosuppressive drugs or from other immunosuppressive drugs to cyclosporine in patients concomitantly receiving mycophenolic acid delayed-release tablets [see Clinical Pharmacology (12.3) ]. 7.6 Norfloxacin and Metronidazole MPA plasma concentrations may be decreased when MMF is administrated with norfloxacin and metronidazole. Therefore, mycophenolic acid delayed-release tablets are not recommended to be given with the combination of norfloxacin and metronidazole. Although there will be no effect on MPA plasma concentrations when mycophenolic acid delayed-release tablets are concomitantly administered with norfloxacin or metronidazole when given separately [see Clinical Pharmacology (12.3) ]. 7.7 Rifampin The concomitant administration of MMF and rifampin may decrease MPA plasma concentrations. Therefore, mycophenolic acid delayed-release tablets are not recommended to be given with rifampin concomitantly unless the benefit outweighs the risk [see Clinical Pharmacology (12.3) ]. 7.8 Hormonal Contraceptives In a drug interaction study, mean levonorgestrel AUC was decreased by 15% when coadministered with MMF. Although mycophenolic acid delayed-release tablets may not have any influence on the ovulation-suppressing action of oral contraceptives, additional barrier contraceptive methods must be used when mycophenolic acid delayed-release tablets are coadministered with hormonal contraceptives (e.g., birth control pill, transdermal patch, vaginal ring, injection, and implant) [see Warnings and Precautions (5.1) , Use in Specific Populations (8.3) , Clinical Pharmacology (12.3) ]. 7.9 Acyclovir (Valacyclovir), Ganciclovir (Valganciclovir), and Other Drugs That Undergo Renal Tubular Secretion The coadministration of MMF and acyclovir or ganciclovir may increase plasma concentrations of mycophenolic acid glucuronide (MPAG) and acyclovir/valacyclovir/