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Drugs reference index «Risedronate Sodium»

Risedronate Sodium

Risedronate Sodium

Pronunciation: (RIS-e-DROE-nate SOE-dee-um)Class: Bisphosphonate

Trade Names:Actonel- Tablets 5 mg- Tablets 30 mg- Tablets 35 mg- Tablets 150 mg


Inhibits normal and abnormal bone resorption.



Relatively rapid and occurs in upper GI tract (oral). T max is about 1 h. Steady state is about 57 days. Bioavailability is 0.63%.


60% of dose is distributed to bone. Protein binding is about 24%.

Steady-state Vd is 13.8 L/kg.


No evidence of system metabolism.


Eliminated in urine (about 50%) in 24 h. Mean renal Cl is 105 mL/min. Mean total Cl is 122 mL/min. Terminal exponential half-life is about 561 h.

Special Populations

Renal Function Impairment

Cl decreased about 70% with CrCl 30 mL/min. Not recommended for use in patients with severe renal function impairment.

Hepatic Function Impairment

Pharmacokinetics have not been studied.

Indications and Usage

Treatment and prevention of osteoporosis in postmenopausal women; prevention and treatment of glucocorticoid-induced osteoporosis in men and women; treatment of Paget disease of the bone in men and women; treatment to increase bone mass in men with osteoporosis.


Hypocalcemia; inability to stand or sit upright for at least 30 min; hypersensitivity to any component of the product.

Dosage and Administration

Paget DiseaseAdults

PO 30 mg once daily for 2 mo.

Treatment and Prevention of Glucocorticoid-Induced OsteoporosisAdults

PO 5 mg daily.

Treatment and Prevention of Postmenopausal OsteoporosisAdults

PO 5 mg daily, 35 mg once a week or 150 mg once a month.

Treatment to Increase Bone Mass in Men With OsteoporosisAdults

PO 35 mg once weekly.

General Advice

  • To be taken at least 30 min before the first food or drink of the day other than water.
  • To facilitate delivery to the stomach, medication should be swallowed while the patient is in an upright position (with a full glass of water).
  • Patient should not lie down for 30 min after taking the medication.


Store at controlled room temperature (68° to 77°F).

Drug Interactions

Antacids, calcium supplements, oral medicines containing divalent cations

May decrease risedronate absorption, which may decrease activity.

Laboratory Test Interactions

Interferes with bone-imaging agents.

Adverse Reactions


Hypertension (11%); arrhythmia (2%).


Headache (18%); depression, dizziness (7%); asthenia, insomnia (5%).


Rash (12%); bullous skin reactions, generalized rash (postmarketing).


Cataract (7%); pharyngitis (6%); iritis, uveitis (postmarketing).


Diarrhea (20%); constipation (13%); abdominal pain (12%); dyspepsia, nausea (11%); gastritis (3%); upper GI irritation including esophagitis and esophageal or gastric ulcer (postmarketing).


UTI (11%); benign prostatic hyperplasia (5%); nephrolithiasis (3%).


Allergic reactions (4%); angioedema (postmarketing).

Lab Tests

Increased serum parathyroid hormone (less than 30%); hypocalcemia (5%); decreased serum phosphate (less than 3%).


Peripheral edema (8%).


Arthralgia (33%); back pain (28%); arthritis (10%); traumatic bone fracture (9%); joint disorder, myalgia (7%); bone pain, neck pain (5%); incapacitating bone, joint, and muscle pain; osteonecrosis of the jaw (postmarketing).


Bronchitis (10%); sinusitis (9%); increased cough, rhinitis (6%).


Infection (31%); accidental injury (17%); pain (14%); flu-syndrome (11%); chest pain (7%).



Category C .




Safety and efficacy not established.

Renal Function

Not recommended in patients with CrCl less than 30 mL/min.

Hormone status

Before beginning therapy for prevention or treatment of glucocorticoid-induced osteoporosis, determine the hormonal status and consider appropriate replacement.


Effectively treat hypocalcemia and other disturbances of bone and mineral metabolism prior to starting risedronate.

Musculoskeletal pain

Severe and incapacitating bone, joint, and muscle pain have been reported.


Osteonecrosis, primarily of the jaw, has been reported in patients receiving bisphosphonates.

Upper GI disorders

Bisphosphonates may cause upper GI disorders such as dysphagia, esophageal ulcer, esophagitis, and gastric ulcer.



Hypocalcemia, hypophosphatemia.

Patient Information

  • Advise patient to read the patient information leaflet before using product the first time and with each refill.
  • Instruct patient to take the medication exactly as directed, because clinical benefits may be negatively affected by failure to take the drug according to instructions.
  • Instruct patient to take in an upright position with a full 8 oz glass of water 30 min or more before the first food or liquid of the day.
  • Remind patient to avoid lying down for 30 min after taking this medication.
  • Instruct the patient that if a dose of 150 mg once-a-month is missed and the next month's dose is more than 7 days away, to take the missed dose in the morning after the day it is remembered. Instruct patients to return to taking their once-a-month dose as originally scheduled. Advise patients to not take more than one 150 mg tablet within 7 days. If the once-a-month dose is missed, and the next month's dose is within 7 days instruct patients to wait until their next month's scheduled dose and then continue taking the once-a-month dose as originally scheduled.
  • Instruct patient to take supplemental calcium and vitamin B if dietary intake is inadequate.
  • Instruct patient to take any supplement containing calcium or antacids containing magnesium or aluminum 1 h or more before or 2 h after taking risedronate tablets to prevent interference with absorption.
  • Instruct patient to report any symptoms of esophageal disease (eg, difficulty or pain upon swallowing; retrosternal pain; severe, persistent, or worsening heartburn) to health care provider before continuing treatment.
  • Instruct patient that if a dose of risedronate 35 mg weekly is missed, to take 35 mg on the morning after they remember and return to taking 35 mg weekly, as originally scheduled on their chosen day. Advise patients not to take two 35 mg tablets on the same day.
  • Warn breast-feeding women that a decision to use the drug or continue breast-feeding should be made in collaboration with their primary health care provider.

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