Pronunciation:

koe-ni-VAP-tan

Brand Names:

• Vaprisol

Dosage Forms:

• Solution

Classifications:

Therapeutic—

Endocrine-Metabolic Agent

Pharmacologic—

Vasopressin Receptor Antagonist, V1a/V2

Uses of This Medicine:

Conivaptan injection is used to treat euvolemic hyponatremia (a condition where there is not enough sodium in your blood but with a normal blood volume). Sodium is a chemical that the body needs to be able to function well. Even if there is a normal blood volume, but with a low sodium level, it can still be a danger to your health. Conivaptan works by maintaining the right amount of sodium that the body needs.

This medicine is to be given only by or under the supervision of your doctor.

Before Using This Medicine:

In deciding to use a medicine, the risks of taking the medicine must be weighed against the good it will do. This is a decision you and your doctor will make. For this medicine, the following should be considered:

Allergies—

Tell your doctor if you have ever had any unusual or allergic reaction to this medicine or any other medicines. Also tell your health care professional if you have any other types of allergies, such as to foods, dyes, preservatives, or animals. For non-prescription products, read the label or package ingredients carefully.

Children—

Appropriate studies have not been performed on the relationship of age to the effects of conivaptan injection in the pediatric population. Safety and efficacy have not been established.

Older adults—

Appropriate studies performed to date have not demonstrated geriatric-specific problems that would limit the usefulness of conivaptan injection in the elderly.

Breast-feeding—

There are no adequate studies in women for determining infant risk when using this medication during breastfeeding. Weigh the potential benefits against the potential risks before taking this medication while breastfeeding.

Other medicines—

Although certain medicines should not be used together at all, in other cases two different medicines may be used together even if an interaction might occur. In these cases, your doctor may want to change the dose, or other precautions may be necessary. When you are receiving this medicine, it is especially important that your healthcare professional know if you are taking any of the medicines listed below. The following interactions have been selected on the basis of their potential significance and are not necessarily all-inclusive.

Using this medicine with any of the following medicines is not recommended. Your doctor may decide not to treat you with this medication or change some of the other medicines you take.

• Alfuzosin
• Alprazolam
• Boceprevir
• Clarithromycin
• Cobicistat
• Colchicine
• Delavirdine
• Dronedarone
• Eletriptan
• Eliglustat
• Eplerenone
• Ergotamine
• Finerenone
• Flibanserin
• Gepirone
• Idelalisib
• Indinavir
• Isavuconazonium Sulfate
• Itraconazole
• Ivabradine
• Ketoconazole
• Levoketoconazole
• Lomitapide
• Lopinavir
• Lurasidone
• Maraviroc
• Mavacamten
• Naloxegol
• Nefazodone
• Nelfinavir
• Nimodipine
• Pacritinib
• Posaconazole
• Ritonavir
• Saquinavir
• Telaprevir
• Telithromycin
• Tolvaptan
• Ubrogepant
• Venetoclax
• Voclosporin
• Voriconazole

Using this medicine with any of the following medicines is usually not recommended, but may be required in some cases. If both medicines are prescribed together, your doctor may change the dose or how often you use one or both of the medicines.

• Acalabrutinib
• Adagrasib
• Ado-Trastuzumab Emtansine
• Afatinib
• Alfentanil
• Amiodarone
• Amlodipine
• Apalutamide
• Apixaban
• Aprepitant
• Aripiprazole
• Artemether
• Atogepant
• Atorvastatin
• Avacopan
• Avanafil
• Avapritinib
• Axitinib
• Bedaquiline
• Belzutifan
• Benzhydrocodone
• Berotralstat
• Betrixaban
• Bosutinib
• Brexpiprazole
• Brigatinib
• Bromocriptine
• Budesonide
• Buprenorphine
• Buspirone
• Cabazitaxel
• Cabozantinib
• Calcifediol
• Carbamazepine
• Cariprazine
• Ceritinib
• Cilostazol
• Cisapride
• Clozapine
• Cobimetinib
• Codeine
• Copanlisib
• Crizotinib
• Cyclosporine
• Dabigatran Etexilate
• Dabrafenib
• Daclatasvir
• Daridorexant
• Darifenacin
• Darunavir
• Dasatinib
• Deflazacort
• Delamanid
• Dexamethasone
• Diazepam
• Digoxin
• Dihydrocodeine
• Dihydroergotamine
• Diltiazem
• Docetaxel
• Domperidone
• Doxorubicin
• Doxorubicin Hydrochloride Liposome
• Duvelisib
• Elacestrant
• Elagolix
• Elbasvir
• Elexacaftor
• Encorafenib
• Entrectinib
• Enzalutamide
• Erlotinib
• Erythromycin
• Estradiol
• Eszopiclone
• Everolimus
• Fedratinib
• Felodipine
• Fentanyl
• Fesoterodine
• Fexinidazole
• Fluconazole
• Fluticasone
• Fosaprepitant
• Fosnetupitant
• Futibatinib
• Gilteritinib
• Glasdegib
• Grazoprevir
• Guanfacine
• Haloperidol
• Hydrocodone
• Hydrocortisone
• Ibrexafungerp
• Ibrutinib
• Ifosfamide
• Infigratinib
• Irinotecan
• Irinotecan Liposome
• Istradefylline
• Ivacaftor
• Ivosidenib
• Ixabepilone
• Ixazomib
• Lapatinib
• Larotrectinib
• Lefamulin
• Lemborexant
• Lenacapavir
• Leniolisib
• Lercanidipine
• Levomilnacipran
• Lorlatinib
• Lovastatin
• Lumacaftor
• Lumateperone
• Lumefantrine
• Lurbinectedin
• Macitentan
• Manidipine
• Meperidine
• Methadone
• Midazolam
• Midostaurin
• Mifepristone
• Mirtazapine
• Mirvetuximab Soravtansine-gynx
• Mitapivat
• Mobocertinib
• Morphine
• Morphine Sulfate Liposome
• Nateglinide
• Neratinib
• Netupitant
• Nifedipine
• Nilotinib
• Nisoldipine
• Olaparib
• Olutasidenib
• Omaveloxolone
• Omeprazole
• Ondansetron
• Osilodrostat
• Oxycodone
• Paclitaxel
• Palbociclib
• Palovarotene
• Panobinostat
• Paritaprevir
• Pazopanib
• Pemigatinib
• Pentazocine
• Pexidartinib
• Phenobarbital
• Pimavanserin
• Pimozide
• Piperaquine
• Pirtobrutinib
• Pixantrone
• Ponatinib
• Pralsetinib
• Primidone
• Progesterone
• Quetiapine
• Quinidine
• Quizartinib
• Ranolazine
• Reboxetine
• Regorafenib
• Relugolix
• Retapamulin
• Ribociclib
• Rifabutin
• Rimegepant
• Ritlecitinib
• Rivaroxaban
• Romidepsin
• Ruxolitinib
• Salmeterol
• Selpercatinib
• Selumetinib
• Sildenafil
• Simeprevir
• Simvastatin
• Sirolimus
• Sirolimus Protein-Bound
• Sonidegib
• Sparsentan
• Sufentanil
• Sunitinib
• Suvorexant
• Tacrolimus
• Tadalafil
• Tamoxifen
• Tamsulosin
• Tazemetostat
• Temsirolimus
• Tenofovir Alafenamide
• Tezacaftor
• Thiotepa
• Tipranavir
• Tocilizumab
• Topotecan
• Toremifene
• Trabectedin
• Tramadol
• Trazodone
• Triazolam
• Trofinetide
• Upadacitinib
• Valbenazine
• Vardenafil
• Vemurafenib
• Venlafaxine
• Verapamil
• Vilanterol
• Vilazodone
• Vincristine
• Vincristine Sulfate Liposome
• Vinflunine
• Vorapaxar
• Zaleplon
• Zanubrutinib
• Ziprasidone
• Zolpidem
• Zuranolone

Using this medicine with any of the following medicines may cause an increased risk of certain side effects, but using both drugs may be the best treatment for you. If both medicines are prescribed together, your doctor may change the dose or how often you use one or both of the medicines.

• Aripiprazole Lauroxil

Other interactions—

Certain medicines should not be used at or around the time of eating food or eating certain types of food since interactions may occur. Using alcohol or tobacco with certain medicines may also cause interactions to occur. The following interactions have been selected on the basis of their potential significance and are not necessarily all-inclusive.

Using this medicine with any of the following is not recommended. Your doctor may decide not to treat you with this medication, change some of the other medicines you take, or give you special instructions about the use of food, alcohol, or tobacco.

• Grapefruit Juice

Other medical problems—

The presence of other medical problems may affect the use of this medicine. Make sure you tell your doctor if you have any other medical problems, especially:

• Anuria (trouble urinating) or
• Hypovolemic hyponatremia (low blood sodium with low blood volume)—Should not be used in patients with these conditions.

• Heart disease (eg, heart failure) or
• Hypotension (low blood pressure) or
• Hypovolemia (low blood volume)—Use with caution. May make these conditions worse.

• Kidney disease, moderate or severe or
• Liver disease, severe—Use with caution. These conditions may increase the concentration of conivaptan in your blood.

Proper Use of This Medicine:

A nurse or other trained health professional will give you this medicine in a hospital. This medicine is given through a needle placed in one of your veins.

Precautions While Using This Medicine:

It is important that your doctor check your progress at regular visits. This will allow your doctor to see if the medicine is working properly and to decide if you should continue to use it. Blood tests may be needed to check for unwanted effects.

If your symptoms do not improve within a few days or if they become worse, check with your doctor.

You should not use clarithromycin (Biaxin®), indinavir (Crixivan®), itraconazole (Sporanox®), ketoconazole (Nizoral®), or ritonavir (Norvir®). Using these medicines together may cause serious unwanted effects.

Tell your doctor right away if you have the following symptoms after receiving this medicine: a slurred speech, trouble speaking, trouble swallowing, seizures, or unusual drowsiness, dullness, tiredness, weakness or feeling of sluggishness. These may be symptoms of a nerve problem called osmotic demyelination syndrome.

This medicine may make you feel dizzy or lightheaded. Do not drive or do anything that could be dangerous until you know how this medicine affects you.

Do not take other medicines unless they have been discussed with your doctor. This includes prescription or nonprescription (over-the-counter [OTC]) medicines and herbal or vitamin supplements.

Side Effects of This Medicine:

Along with its needed effects, a medicine may cause some unwanted effects. Although not all of these side effects may occur, if they do occur they may need medical attention.

Check with your doctor or nurse immediately if any of the following side effects occur:

More common

Bleeding, blistering, burning, coldness, discoloration of the skin, feeling of pressure, hives, infection, inflammation, itching, lumps, numbness, pain, rash, redness, scarring, soreness, stinging, swelling, tenderness, tingling, ulceration, or warmth at the site

bloating or swelling of the face, arms, hands, lower legs, ankles, or feet

blurred vision

decreased urine

dizziness

dry mouth

headache

increased thirst

irregular heartbeat

loss of appetite

mood changes

muscle pain or cramps

nausea or vomiting

nervousness

numbness or tingling in the hands, feet, or lips

pounding in the ears

rapid weight gain

seizures

slow or fast heartbeat

tingling of hands or feet

unusual tiredness or weakness

unusual weight gain or loss

Less common

Abdominal or stomach pain

bladder pain

bloody or cloudy urine

bluish color

change in consciousness

changes in skin color

chest pain

cold sweats

confusion

cool pale skin

cough

decreased urination

depression

difficult, burning, or painful urination

dizziness, faintness, or lightheadedness when getting up suddenly from a lying or sitting position

drowsiness

fainting

fear

fever or chills

flushed, dry skin

frequent urge to urinate

fruit-like breath odor

increase in amount of urine

increase in heart rate

increased hunger

increased urination

loss of consciousness

lower back or side pain

mental changes

muscle spasms [tetany] or twitching

nightmares

pale skin

problems in urination

rapid breathing

shakiness

slurred speech

sneezing

sore mouth or tongue

sore throat

sunken eyes

sweating

swelling of the foot or leg

tenderness

thirst

tightness in the chest

trembling

trouble sleeping

troubled breathing with exertion

unusual bleeding or bruising

white patches in the mouth or on the tongue

wrinkled skin

Some side effects may occur that usually do not need medical attention. These side effects may go away during treatment as your body adjusts to the medicine. Also, your health care professional may be able to tell you about ways to prevent or reduce some of these side effects. Check with your health care professional if any of the following side effects continue or are bothersome or if you have any questions about them:

More common

Diarrhea

Less common

Difficulty having a bowel movement (stool)

redness of the skin

unusually warm skin

Other side effects not listed may also occur in some patients. If you notice any other effects, check with your healthcare professional.

Call your doctor for medical advice about side effects. You may report side effects to the FDA at 1-800-FDA-1088.