DailyMed Label: iopamidol

DailyMed Label: iopamidol

2024

DailyMed Prescription

iopamidol

iopamidol

Slate Run Pharmaceuticals

NDC: 70436-124

NDC: 70436-124

NDC: 70436-126

NDC: 70436-126

Iopamidol Injection, USP formulations are stable, aqueous, sterile, and nonpyrogenic solutions for intrathecal administration. Each mL of Iopamidol Injection, USP, 41% provides 408 mg iopamidol with 1 mg tromethamine and 0.26 mg edetate calcium disodium. The solution contains approximately 0.029 mg (0.001 mEq) sodium and 200 mg organically bound iodine per mL. Each mL of Iopamidol Injection, USP, 61% provides 612 mg iopamidol with 1 mg tromethamine and 0.39 mg edetate calcium disodium. The solution contains approximately 0.043 mg (0.002 mEq) sodium and 300 mg organically bound iodine per mL. The pH of Iopamidol Injection, USP contrast media has been adjusted to 6.5-7.5 with hydrochloric acid and/or sodium hydroxide. Pertinent physicochemical data are noted below. Iopamidol Injection, USP is hypertonic as compared to plasma and cerebrospinal fluid (approximately 285 and 301 mOsm/kg water, respectively). Iopamidol Parameter 41% 61% Concentration (mgI/mL) 200 300 Osmolality @ 37°C (mOsm/kg water) 413 616 Viscosity (cP) @ 37°C 2.0 4.7 @ 20°C 3.3 8.8 Specific Gravity @ 37°C 1.216 1.328 Iopamidol is designated chemically as (S)-N,N’-bis[2-hydroxy-1-(hydroxymethyl)-ethyl]- 2,4,6-triiodo-5-lactamidoisophthalamide. Structural formula: MW 777.09 C 17 H 22 I 3 N 3 O 8 CAS-60166-93-0 Organically Bound Iodine: 49% structural-formula

Iopamidol Injection is indicated for intrathecal administration in adult neuroradiology including myelography (lumbar, thoracic, cervical, total columnar), and for contrast enhancement of computed tomographic (CECT) cisternography and ventriculography. Iopamidol Injection, 41% is indicated for thoraco-lumbar myelography in children over the age of two years.

In adults a solution that is approximately isotonic (Iopamidol Injection, 41%) is recommended for examination of the lumbar region. For movement of the contrast medium to distant target areas the more concentrated Iopamidol Injection, 61% preparation should be used to compensate for dilution of Iopamidol Injection with cerebrospinal fluid. The usual recommended adult dose range for iopamidol is 2000-3000 mg iodine. Iopamidol formulated to contain more than 300 mgI/mL should not be used intrathecally in adults. The minimum dose needed to perform a procedure should always be used. In pediatric patients , a solution that is approximately isotonic (Iopamidol Injection, 41%) is recommended for all intrathecal procedures. In children, loss of contrast due to mixing on movement of the medium is less apt to occur because of their shorter spinal cord. The usual recommended pediatric dose range for iopamidol is 1400-2400 mg iodine. Iopamidol formulated to contain more than 200 mgI/mL should not be used intrathecally in children. The minimum dose needed to perform a procedure should always be used. See pediatric dosage table for recommended dosage . Anesthesia is not necessary. However, young children may require general anesthesia for technical reasons. Premedication with sedatives or tranquillizers is usually not needed. In patients with a history of seizure activity who are not on anticonvulsant therapy, premedication with barbiturates or phenytoin should be considered. Lumbar puncture is usually made between L3 and L4; if pathology is suspected at this level, the interspace immediately above or below may be selected. A lateral cervical puncture may also be used. Rate of Injection: To avoid excessive mixing with cerebrospinal fluid and consequent loss of contrast as well as premature cephalad dispersion, injection must be made slowly over one to two minutes; the needle may then be removed. An interval of at least 48 hours should be allowed before repeat examination; however, whenever possible five to seven days is recommended. As with all radiopaque contrast agents, only the lowest dose of Iopamidol Injection necessary to obtain adequate visualization should be used. A lower dose reduces the possibility of an adverse reaction. Most procedures do not require use of either a maximum dose or the highest available concentration of Iopamidol Injection; the combination of dose and Iopamidol Injection concentration to be used should be carefully individualized, and factors such as age, body size, anticipated pathology and degree and extent of opacification required, structure(s) or area to be examined, disease processes affecting the patient, and equipment and technique to be employed should be considered. Following are the usual recommended pediatric and adult doses of Iopamidol Injection. The pediatric doses listed below, intended as a guideline, are based on age rather than weight because the brain and CSF capacity is independent of weight. Variations will depend on such factors as height, suspected pathology, the patient’s condition, technique used, etc. (e.g. CT or standard radiology or movement of the contrast media directed distal to the site of injection). Pediatric Dosage Table Iopamidol Injection, 41% (200 mgI/mL) Procedure Age Years Usual Recommended Dose (mL) Lumbar, thoracic myelogram 2-7 7-9 8-12 8-11 13-18 10-12 Adult Dosage Table Concentration of Solution (mgI/mL) Usual Recommended Dose (mL) Lumbar myelogram 200 10 to 15 Thoracic myelogram 200 10 to 15 Cervical myelogram 200 10 to 15 (via lumbar injection) 300 10 Cervical myelogram (via lateral cervical injection) 200 10 Total columnar myelography 300 10 CT cisternography (via lumbar injection) 200 4 to 6 Following subarachnoid injection, conventional radiography will continue to provide good diagnostic contrast for at least 30 minutes. At about one hour, diagnostic degree of contrast will not usually be available. However, sufficient contrast for CT myelography will be available for several hours. CT myelography following conventional myelography should be deferred for at least four hours to reduce the degree of contrast. Aspiration of iopamidol is unnecessary following intrathecal administration (see CLINICAL PHARMACOLOGY ). Parenteral drug products should be inspected visually for particulate matter and discoloration prior to administration, whenever solution and container permit. Iopamidol solutions should be used only if clear and within the normal colorless to pale yellow range. Discard any product which shows signs of crystallization or damage to the container-closure system, which includes the glass container, stopper and/or crimp. It is desirable that solutions of radiopaque diagnostic agents for intrathecal use be at body temperature when injected. Withdrawal of contrast agents from their containers should be accomplished under aseptic conditions with sterile syringes. Spinal puncture must always be performed under sterile conditions. Patients should be well hydrated prior to and following Iopamidol Injection administration. See WARNINGS regarding discontinuation of neuroleptic agents. Maintain normal diet up to 2 hours before procedure. Ensure hydration-fluids up to time of procedure. Use minimum dose and concentration required for satisfactory contrast. Inject slowly over 1 to 2 minutes to avoid excessive mixing. Abrupt or active patient movement causes excessive mixing with CSF. Instruct patient to remain passive . Move patient slowly and only as necessary. To maintain as a bolus, move medium to distal area very slowly under fluoroscopic control. In all positioning techniques keep the patient’s head elevated above highest level of spine. Do not lower head of table more than 15° during thoraco-cervical procedures. In patients with excessive lordosis, consider lateral position for injection and movement of the medium cephalad. Avoid intracranial entry of a bolus. Avoid early and high cephalad dispersion of the medium. At completion of direct cervical or lumbo-cervical procedures, raise head of table steeply (45°) for about 2 minutes to restore medium to lower levels. Raise head of stretcher to at least 30° before moving patient onto it. Movement onto stretcher, and off the stretcher to bed, should be done slowly with patient completely passive, maintaining head up position. Before moving patient onto bed, raise head of bed 30° to 45° and maintain the patient in this position under close observation for 12 to 24 hours. Advise patient to remain still in bed, in head up position for the first 24 hours. Obtain visitors cooperation in keeping the patient quiet and in head up position, especially in first few hours. Encourage oral fluids and diet as tolerated. Antinauseants of the phenothiazine class should not be administered to treat postprocedural nausea or vomiting (see WARNINGS ). Since persistent nausea and vomiting may result in dehydration, prompt consideration of volume replacement by intravenous fluids is recommended. Many radiopaque contrast agents are incompatible in vitro with some antihistamines and many other drugs; therefore, no other pharmaceuticals should be admixed with contrast agents.

Intrathecal administration of corticosteroids with iopamidol is contraindicated. Because of overdosage considerations, immediate repeat myelography in the event of technical failure is contraindicated (see interval recommendation under DOSAGE AND ADMINISTRATION ). Myelography should not be performed in the presence of significant local or systemic infection where bacteremia is likely.

Diagnostic procedures which involve the use of any radiopaque agent should be carried out under the direction of personnel with the prerequisite training and with a thorough knowledge of the particular procedure to be performed. Appropriate facilities should be available for coping with any complication of the procedure, as well as for emergency treatment of severe reaction to the contrast agent itself. After parenteral administration of a radiopaque agent, competent personnel and emergency facilities should be available for at least 30 to 60 minutes since severe delayed reactions may occur. Preparatory dehydration is dangerous and may contribute to acute renal failure in patients with advanced vascular disease, diabetic patients, and in susceptible nondiabetic patients (often elderly with pre-existing renal disease). Patients should be well hydrated prior to and following iopamidol administration. The possibility of a reaction, including serious, life-threatening, fatal, anaphylactoid or cardiovascular reactions, should always be considered (see ADVERSE REACTIONS ). Patients at increased risk include those with a history of a previous reaction to a contrast medium, patients with a known sensitivity to iodine per se, and patients with a known clinical hypersensitivity (bronchial asthma, hay fever, and food allergies). The occurrence of severe idiosyncratic reactions has prompted the use of several pretesting methods. However, pretesting cannot be relied upon to predict severe reactions and may itself be hazardous for the patient. It is suggested that a thorough medical history with emphasis on allergy and hypersensitivity, prior to the injection of any contrast medium, may be more accurate than pretesting in predicting potential adverse reactions. A positive history of allergies or hypersensitivity does not arbitrarily contraindicate the use of a contrast agent where a diagnostic procedure is thought essential, but caution should be exercised. Premedication with antihistamines or corticosteroids to avoid or minimize possible allergic reactions in such patients should be considered (see CONTRAINDICATIONS ). Reports indicate that such pretreatment does not prevent serious life-threatening reactions, but may reduce both their incidence and severity. Pre-existing conditions, such as pacemakers or cardiac medications, specifically beta-blockers, may mask or alter the signs or symptoms of an anaphylactoid reaction, as well as masking or altering the response to particular medications used for treatment. For example, beta-blockers inhibit a tachycardiac response, and can lead to the incorrect diagnosis of a vasovagal rather than an anaphylactoid reaction. Special attention to this possibility is particularly critical in patients suffering from serious, life-threatening reactions. The possibility of inducing bacterial meningitis in patients during intrathecal procedures should always be considered. To avoid bacterial contamination during spinal puncture, a sterile field should be maintained at all times. If nondisposable equipment is used, scrupulous care should be taken to prevent residual contamination with traces of cleansing agents. Patients receiving injectable radiopaque diagnostic agents should be instructed to: Inform your physician if you are pregnant. Inform your physician if you are diabetic or if you have multiple myeloma, pheochromocytoma, homozygous sickle cell disease, or known thyroid disorder. Inform your physician if you are allergic to any drugs, food, or if you had any reactions to previous injections of substances used for x-ray procedures (see PRECAUTIONS : General ). Inform your physician about any other medications you are currently taking, including nonprescription drugs, before you have this procedure. Advise patients to inform their physician if they develop a rash after receiving Iopamidol Injection. Other drugs should not be admixed with iopamidol (see CONTRAINDICATIONS , and DOSAGE AND ADMINISTRATION : Drug Incompatibilities ). The results of PBI and radioactive iodine uptake studies, which depend on iodine estimations, will not accurately reflect thyroid function for up to 16 days following administration of iodinated contrast media. However, thyroid function tests not depending on iodine estimations, e.g., T3 resin uptake and total or free thyroxine (T4) assays are not affected. Any test which might be affected by contrast media should be performed prior to administration of the contrast medium. In vitro studies with animal blood showed that many radiopaque contrast agents, including iopamidol, produced a slight depression of plasma coagulation factors including prothrombin time, partial thromboplastin time, and fibrinogen, as well as a slight tendency to cause platelet and/or red blood cell aggregation. Transitory changes may occur in red cell and leucocyte counts, serum calcium, serum creatinine, serum glutamic oxalacetic transaminase (SGOT), and uric acid in urine; transient albuminuria may occur. These findings have not been associated with clinical manifestations. Long-term studies in animals have not been performed to evaluate carcinogenic potential. No evidence of genetic toxicity was obtained in in vitro tests. Reproduction studies have been performed in rats and rabbits at doses up to 2.7 and 1.4 times the maximum recommended human dose (1.48 gI/kg in a 50 kg individual), respectively, and have revealed no evidence of impaired fertility or harm to the fetus due to iopamidol. There are, however, no adequate and well-controlled studies in pregnant women. Because animal reproduction studies are not always predictive of human response, this drug should be used during pregnancy only if clearly needed. It is not known whether this drug is excreted in human milk. Because many drugs are excreted in human milk, caution should be exercised when iopamidol is administered to a nursing woman. See DOSAGE AND ADMINISTRATION section.

The most frequently reported adverse reactions following intrathecal administration of iopamidol are headache, nausea, vomiting, and musculoskeletal pain. These reactions usually occur 1 to 10 hours after injection, almost all occurring within 24 hours. They are usually mild to moderate in degree, lasting for a few hours and usually disappearing within 24 hours. Rarely, headaches may be severe or persist for days. Headache is often accompanied by nausea and vomiting, and tends to be more frequent and persistent in patients not optimally hydrated. Backache, neck stiffness, numbness and paresthesias, leg or sciatic-type pain occurred less frequently, often in the form of a transient exacerbation of pre-existing symptomatology. Transient alterations in vital signs may occur and their significance must be assessed on an individual basis.

Other drugs should not be admixed with iopamidol (see CONTRAINDICATIONS , and DOSAGE AND ADMINISTRATION : Drug Incompatibilities ).

Iopamidol Injection, USP formulations are clear, colorless to pale yellow, stable, aqueous, sterile, and nonpyrogenic solutions for intrathecal administration. It is supplied in the following strengths: Iopamidol Injection, USP, 41% Iopamidol Injection, USP, 41% contains 408 mg iopamidol per mL and is supplied in vials as follows: Vial NDC Volume per Vial Package Size (NDC) 70436-124-33 10 mL in single-dose vial 10 vials per carton (70436-124-82) 70436-124-35 20 mL in single-dose vial 10 vials per carton (70436-124-52) Iopamidol Injection, USP, 61% Iopamidol Injection, USP, 61% contains 612 mg iopamidol per mL and is supplied in vials as follows: Vial NDC Volume per Vial Package Size (NDC) 70436-126-34 15 mL in single-dose vial 10 vials per carton (70436-126-82) Discard unused portion. Store at 20° to 25°C (68° to 77°F); excursions permitted to 15° to 30°C (59° to 86°F) [See USP Controlled Room Temperature]. Protect from light. Manufactured by: Hainan Poly Pharm. Co., Ltd., Guilinyang Economic Development Zone, Haikou, Hainan, China 571127 Distributed by: Slate Run Pharmaceuticals, LLC, Columbus, Ohio 43215 10000243/03 Revised 04/2024

The pharmacokinetics of intravenously administered iopamidol in normal subjects conform to an open two-compartment model with first order elimination (a rapid alpha phase for drug distribution and a slow beta phase for drug elimination). The elimination serum or plasma half-life is approximately two hours; the half-life is not dose dependent. No significant metabolism, deiodination, or biotransformation occurs. Iopamidol is rapidly absorbed into the bloodstream from cerebrospinal fluid (CSF); following intrathecal administration, iopamidol appears in plasma within one hour and virtually all of the drug reaches the systemic circulation within 24 hours. Iopamidol is excreted mainly through the kidneys following intrathecal administration, and the drug is essentially undetectable in the plasma 48 hours later. In patients with impaired renal function, the elimination half-life is prolonged dependent upon the degree of impairment. In the absence of renal dysfunction, the cumulative urinary excretion for iopamidol, expressed as a percentage of administered intravenous dose is approximately 35 to 40 percent at 60 minutes, 80 to 90 percent at 8 hours, and 90 percent or more in the 72- to 96-hour period after administration. In normal subjects, approximately 1 percent or less of the administered dose appears in cumulative 72- to 96-hour fecal specimens. Iopamidol displays little tendency to bind to serum or plasma proteins. No evidence of in vivo complement activation has been found in normal subjects. Animal studies indicate that iopamidol does not cross the blood-brain barrier to any significant extent following intravascular administration.

NDC 70436-124-33 Iopamidol Injection, USP, 41% 10 mL single-dose vial vial-10mL