Desmopressin Nasal Solution

Store the US product in the refrigerator between 36-46 degrees F (2-8 degrees C). Do not freeze. When traveling, the US product may remain at room temperature between 68-77 degrees F (20-25 degrees C) away from light and moisture for up to 3 weeks. Discard after 3 weeks out of the refrigerator.Store the Canadian product in the refrigerator between 36-46 degrees F (2-8 degrees C). Do not freeze.Keep all medicines away from children and pets.Do not flush medications down the toilet or pour them into a drain unless instructed to do so. Properly discard this product when it is expired or no longer needed. Consult your pharmacist or local waste disposal company for more details about how to safely discard your product.

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Reviewed on 4/16/2014 References

Central Cranial Diabetes Insipidus:

Desmopressin Acetate Nasal Spray Solution is indicated as antidiuretic replacement therapy in the management of central cranial diabetes insipidus and for management of the temporary polyuria and polydipsia following head trauma or surgery in the pituitary region. It is ineffective for the treatment of nephrogenic diabetes insipidus.

The use of Desmopressin Acetate Nasal Spray Solution in patients with an established diagnosis will result in a reduction in urinary output with increase in urine osmolality and a decrease in plasma osmolality. This will allow the resumption of a more normal life-style with a decrease in urinary frequency and nocturia.

There are reports of an occasional change in response with time, usually greater than 6 months. Some patients may show a decreased responsiveness, others a shortened duration of effect. There is no evidence this effect is due to the development of binding antibodies but may be due to a local inactivation of the peptide.

Patients are selected for therapy by establishing the diagnosis by means of the water deprivation test, the hypertonic saline infusion test, and/or the response to antidiuretic hormone. Continued response to intranasal desmopressin acetate can be monitored by urine volume and osmolality.

Desmopressin Acetate Nasal Spray Solution is also available as a solution for injection when the intranasal route may be compromised. These situations include nasal congestion and blockage, nasal discharge, atrophy of nasal mucosa, and severe atrophic rhinitis. Intranasal delivery may also be inappropriate where there is an impaired level of consciousness. In addition, cranial surgical procedures, such as transsphenoidal hypophysectomy create situations where an alternative route of administration is needed as in cases of nasal packing or recovery from surgery.

General:

Intranasal desmopressin acetate at high dosage has infrequently produced a slight elevation of blood pressure, which disappeared with a reduction in dosage. The drug should be used with caution in patients with coronary artery insufficiency and/or hypertensive cardiovascular disease because of possible rise in blood pressure.

Desmopressin acetate should be used with caution in patients with conditions associated with fluid and electrolyte imbalance, such as cystic fibrosis, because these patients are prone to hyponatremia.

Rare severe allergic reactions have been reported with desmopressin acetate. Anaphylaxis has been reported rarely with intravenous and intranasal administration of desmopressin acetate.

Central Cranial Diabetes Insipidus:

Since intranasal desmopressin acetate is used intranasally, changes in the nasal mucosa such as scarring, edema, or other disease may cause erratic, unreliable absorption in which case intranasal desmopressin acetate should not be used. For such situations, desmopressin acetate injection should be considered.

Information for Patients:

Ensure that in children administration is under adult supervision in order to control the dose intake. Patients should be informed that the Desmopressin Acetate Nasal Spray Solution bottle accurately delivers 50 sprays of 10 mg each. Any solution remaining after 50 sprays should be discarded since the amount delivered thereafter may be substantially less than 10 mg of drug. No attempt should be made to transfer remaining solution to another bottle. Patients should be instructed to read accompanying directions on use of the spray pump carefully before use.

Fluid intake should be adjusted downward based upon discussion with the physician.

Laboratory Tests:

Laboratory tests for following the patient with central cranial diabetes insipidus or post-surgical or head trauma-related polyuria and polydipsia include urine volume and osmolality. In some cases plasma osmolality measurements may be required.

Drug Interactions:

Although the pressor activity of intranasal desmopressin acetate is very low compared to the antidiuretic activity, use of large doses of intranasal desmopressin acetate with other pressor agents should only be done with careful patient monitoring. The concomitant administration of drugs that may increase the risk of water intoxication with hyponatremia, (e.g. tricyclic antidepressants, selective serotonin re-uptake inhibitors, chlorpromazine, opiate analgesics, NSAIDs, lamotrigine and carbamazepine) should be performed with caution.

Carcinogenesis, Mutagenesis, Impairment of Fertility:

Studies with desmopressin acetate have not been performed to evaluate carcinogenic potential, mutagenic potential or effects on fertility.

Pregnancy: Category B:

Fertility studies have not been done. Teratology studies in rats and rabbits at doses from 0.05 to 10 mcg/kg/day (approximately 0.1 times the maximum systemic human exposure in rats and up to 38 times the maximum systemic human exposure in rabbits based on surface area, mg/m2) revealed no harm to the fetus due to desmopressin acetate. 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. Several publications of desmopressin acetate's use in the management of diabetes insipidus during pregnancy are available; these include a few anecdotal reports of congenital anomalies and low birth weight babies. However, no causal connection between these events and desmopressin acetate has been established. A 15-year, Swedish epidemiologic study of the use of desmopressin acetate in pregnant women with diabetes insipidus found the rate of birth defects to be no greater than that in the general population; however, the statistical power of this study is low. As opposed to preparations containing natural hormones, desmopressin acetate in antidiuretic doses has no uterotonic action and the physician will have to weigh the therapeutic advantages against the possible risks in each case.

Nursing Mothers:

There have been no controlled studies in nursing mothers. A single study in a postpartum woman demonstrated a marked change in plasma, but little if any change in assayable desmopressin acetate in breast milk following an intranasal dose of 10 mcg. 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 desmopressin acetate is administered to a nursing woman.

Pediatric Use:

Central Cranial Diabetes Insipidus:

Desmopressin acetate has been used in children with diabetes insipidus. Use in infants and children will require careful fluid intake restriction to prevent possible hyponatremia and water intoxication. The dose must be individually adjusted to the patient with attention in the very young to the danger of an extreme decrease in plasma osmolality with resulting convulsions. Dose should start at 0.05 mL or less.

Since the spray cannot deliver less than 0.1 mL (10 mcg), smaller doses should be administered using the rhinal tube delivery system. Do not use the nasal spray in pediatric patients requiring less than 0.1 mL (10 mcg) per dose.

Geriatric Use:

Clinical studies of Desmopressin Acetate Nasal Spray Solution did not include sufficient numbers of subjects aged 65 and over to determine whether they respond differently from younger subjects. Other reported clinical experience had not identified differences in responses between the elderly and younger subjects. In general, dose selection for an elderly patient should be cautious, usually starting at the low end of the dosing range, reflecting the greater frequency of decreased hepatic, renal, or cardiac function, and of concomitant disease or drug therapy.

This drug is known to be substantially excreted by the kidney, and the risk of toxic reactions to this drug may be greater in patients with impaired renal function. Because elderly patients are more likely to have decreased renal function, care should be taken in dose selection, and it may be useful to monitor renal function. Desmopressin Acetate Nasal Spray Solution is contraindicated in patients with moderate to severe renal impairment (defined as a creatinine clearance below 50 mL/min). (See CLINICAL PHARMACOLOGY, Human Pharmacokinetics and CONTRAINDICATIONS.)

Use of Desmopressin Acetate Nasal Spray Solution in geriatric patients will require careful fluid intake restriction to prevent possible hyponatremia and water intoxication. (See WARNINGS.)

There are reports of an occasional change in response with time, usually greater than 6 months. Some patients may show a decreased responsiveness, others a shortened duration of effect. There is no evidence this effect is due to the development of binding antibodies but may be due to a local inactivation of the peptide.

Infrequently, high dosages of intranasal desmopressin acetate have produced transient headache and nausea. Nasal congestion, rhinitis and flushing have also been reported occasionally along with mild abdominal cramps. These symptoms disappeared with reduction in dosage. Nosebleed, sore throat, cough and upper respiratory infections have also been reported.

The following table lists the percentage of patients having adverse experiences without regard to relationship to study drug from the pooled pivotal study data for nocturnal enuresis.

Desmopressin Acetate

	Placebo (N=59)	20 mcg (N=60)	40 mcg (N=61)
Adverse Reaction	%	%	%
BODY AS A WHOLE
Abdominal Pain	0	2	2
Asthenia	0	0	2
Chills	0	0	2
Headache	0	2	5
Throat Pain	2	0	0
NERVOUS SYSTEM
Depression	2	0	0
Dizziness	0	0	3
RESPIRATORY SYSTEM
Epistaxis	2	3	0
Nostril Pain	0	2	0
Respiratory Infection	2	0	0
Rhinitis	2	8	3
CARDIOVASCULAR SYSTEM
Vasodilation	2	0	0
DIGESTIVE SYSTEM
Gastrointestinal Disorder	0	2	0
Nausea	0	0	2
SKIN & APPENDAGES
Leg Rash	2	0	0
Rash	2	0	0
SPECIAL SENSES
Conjunctivitis	0	2	0
Edema Eyes	0	2	0
Lachrymation Disorder	0	0	2

Postmarketing:There have been rare reports of hyponatremic convulsions associated with concomitant use with the following medications: oxybutinin and imipramine.

See WARNINGS for the possibility of water intoxication and hyponatremia.

To report SUSPECTED ADVERSE REACTIONS, contact Bausch + Lomb, a division of Valeant Pharmaceuticals North America LLC at 1-800-321-4576 or FDA at 1-800-FDA-1088 or www.fda.gov/medwatch.

Desmopressin Acetate
Nasal Spray Solution, 10 mcg/0.1 mL

-A BETTER WAY TO DELIVER DESMOPRESSIN ACETATE NASAL SPRAY SOLUTION-

DELIVERING DESMOPRESSIN ACETATE MORE EFFICIENTLY

Your doctor has prescribed Desmopressin Acetate Nasal Spray Solution as antidiuretic hormone replacement therapy. Follow the dosage schedule that is specified. The convenient nasal spray pump provides an efficient, reliable way to administer your medication. It is important, however, to adhere completely to the following instructions so that you will always receive a consistent dose of your medication.

CAUTION: The nasal spray pump accurately delivers 50 sprays of 10 micrograms each. Any solution remaining after 50 sprays should be discarded since the amount delivered in each spray thereafter may be substantially less than 10 micrograms of the drug. Do not transfer any remaining solution to another bottle. Please read the following instructions carefully before using the spray pump.

Ensure that in children administration is under adult supervision in order to control the dose intake.

If you accidentally deliver/administer too much of a dose, immediately telephone your doctor or a certified Regional Poison Center for advice. Possible signs of overdose may include confusion, drowsiness, continuing headache, problems with passing urine and rapid weight gain due to fluid retention.

USING YOUR DESMOPRESSIN ACETATE NASAL SPRAY PUMP

1. Remove protective cap. 2. The spray pump must be primed prior to the first use. To prime the pump, hold the bottle as shown in Figure A and press down with a quick and firm motion a total of five (5) times. This initial priming is very important to assure you receive the correct amount of the solution when you begin to administer the product. The bottle is filled with extra solution to accommodate for this priming activity. 3. Once primed, the spray pump will deliver the correct amount of solution each time it is pressed. To administer, hold bottle upright as shown in Figure A and place the spray nozzle in nostril. Then press the spray pump once with a quick and firm motion. To ensure dosing accuracy, it is very important to hold the bottle upright while administering the solution; it may be necessary to lean your head slightly forward so as to not tilt the bottle. Tilting the bottle, especially when less than half of the solution is left, may cause the pump to not dispense correctly. NOTE - If necessary, clear nasal passages before administering.
4. If a higher dose (or more than one spray) is prescribed, spray half the dose in each nostril. For example, if 4 sprays are prescribed, administer two sprays into each nostril. Please note that the spray pump cannot be used for doses less than 10 micrograms or doses other than multiples of 10 micrograms. 5. Replace the protective cap on bottle after use and store in the refrigerator in an upright position. The pump will stay primed for up to one week under refrigeration. If the product has not been used for a period of one week, re-prime the pump by pressing once. 6. We have included a convenient check-off chart to assist you in keeping track of the number of sprays (doses) used. This will help assure that you receive the labeled 50 sprays (doses) after the initial priming activity. As mentioned above, please discard any remaining solution after administering the 50 sprays as the correct dosage cannot be assured past this point.

Storage: Store in refrigerator at 2°-8°C (36°-46°F). When traveling, product will maintain stability for up to 3 weeks when stored at room temperature, 22°C (72°F).