Hypaque – Cysto

Hypaque – Cysto

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Questions & Answers

Side Effects & Adverse Reactions


Serious adverse reactions have been reported due to the inadvertent intrathecal administration of iodinated contrast media that are not indicated for intrathecal use. These serious adverse reactions include: death, convulsions, cerebral hemorrhage, coma, paralysis, arachnoiditis, acute renal failure, cardiac arrest, seizures, rhabdomyolysis, hyperthermia, and brain edema. Special attention must be given to insure that this drug product is not administered intrathecally.

Ionic iodinated contrast media inhibit blood coagulation, in vitro, more than nonionic contrast media. Nonetheless, it is prudent to avoid prolonged contact of blood with syringes containing ionic contrast media.

Serious, rarely fatal, thromboembolic events causing myocardial infarction and stroke have been reported during angiographic procedures with both ionic and nonionic contrast media. Therefore, meticulous intravascular administration technique is necessary, particularly during angiographic procedures, to minimize thromboembolic events. Numerous factors, including length of procedure, catheter and syringe material, underlying disease state and concomitant medications may contribute to the development of thromboembolic events. For these reasons, meticulous angiographic techniques are recommended including close attention to guidewire and catheter manipulation, use of manifold systems and/or three-way stopcocks, frequent catheter flushing with heparinized saline solutions and minimizing the length of the procedure. The use of plastic syringe in place of glass syringes has been reported to decrease but not eliminate the likelihood of in vitro clotting.

Serious or fatal reactions have been associated with the vascular entry of radiopaque media. It is important that a course of action be carefully planned in advance for the treatment of possible serious reactions.

Legal Issues

There is currently no legal information available for this drug.

FDA Safety Alerts

There are currently no FDA safety alerts available for this drug.

Manufacturer Warnings

There is currently no manufacturer warning information available for this drug.

FDA Labeling Changes

There are currently no FDA labeling changes available for this drug.


HYPAQUE-CYSTO is indicated for retrograde cystourethrography in adult and pediatric patients.


There is currently no drug history available for this drug.

Other Information

HYPAQUE-CYSTO, brand of diatrizoate meglumine, is a water-soluble radiopaque diagnostic medium. It is a triiodinated benzoic acid derivative. It is constituted as a radiopaque iodinated anion (diatrizoate) and a radiolucent cation (meglumine). It is a colorless, microcrystalline solid which is readily soluble in water.

HYPAQUE-CYSTO is a sterile aqueous solution containing 30 g (w/v) of the meglumine salt of diatrizoic acid per 100 mL aqueous solution. The sterile solution is clear and colorless to pale yellow. The pH is adjusted between 6.5 and 7.7 with hydrochloric acid, or diatrizoic acid, or meglumine. It does not contain an antibacterial preservative. It is relatively thermostable and may be autoclaved. Edetate calcium disodium 1:10,000 has been added as a sequestering stabilizing agent. Each 1 mL contains approximately 141 mg of organically bound iodine.

It has an osmolality of 633 mosm/kg (determined by VPO) and is hypertonic to blood.

The viscosity of the solution is 1.94 cp at 25°C and 1.42 cp at 37°C.

HYPAQUE-CYSTO is a 30 percent solution of 1-Deoxy-l (methylamino)-D-glucitol 3,5-diacetamido-2,4,6-triiodobenzoate (C11H9I3N2O4 • C7H17NO5) with a molecular weight of 809.13, and has the following structural formula:

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Hypaque – Cysto Manufacturers

  • Amersham Health Inc.
    Hypaque – Cysto (Diatrizoate Meglumine) Injection, Solution [Amersham Health Inc.]

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