"Nov. 2, 2012 -- Safety steps taken in the wake of the fungal meningitis outbreak have worsened drug shortages, raising questions about whether the U.S. must choose between the safety and the availability of crucial medicines.
NEUROPSYCHIATRIC ADVERSE REACTIONS
PRIALT is contraindicated in patients with a preexisting history of psychosis. Severe psychiatric symptoms and neurological impairment may occur during treatment with PRIALT. Monitor all patients frequently for evidence of cognitive impairment, hallucinations, or changes in mood or consciousness. Discontinue PRIALT therapy in the event of serious neurological or psychiatric signs or symptoms.
PRIALT contains ziconotide, a synthetic equivalent of a naturally occurring conopeptide found in the piscivorous marine snail, Conus magus. Ziconotide is a 25 amino acid, polybasic peptide containing three disulfide bridges with a molecular weight of 2639 daltons and a molecular formula of C102H172N36O32S7. The amino acid sequence and disulfide bridging pattern are given below:
Ziconotide is a hydrophilic molecule that is freely soluble in water and is practically insoluble in methyl t-butyl ether.
PRIALT is formulated as a sterile, preservative-free, isotonic solution for intrathecal administration using an appropriate microinfusion device [see DOSAGE AND ADMINISTRATION]. Each 1 or 5 mL vial of PRIALT (100 mcg/mL) respectively contains 100 or 500 mcg of ziconotide acetate, and the 20 mL vial of PRIALT (25 mcg/mL) contains 500 mcg of ziconotide acetate, with L-methionine and sodium chloride as excipients at pH 4.0–5.0. Each vial is intended for single use only, either undiluted or after dilution to the appropriate concentration with 0.9% Sodium Chloride Injection, USP (preservative free).
What are the possible side effects of ziconotide (Prialt)?
Get emergency medical help if you have any of these signs of an allergic reaction: hives; difficulty breathing; swelling of your face, lips, tongue, or throat.
Call your doctor at once if you have a serious side effect such as:
- problems with memory, speech, walking, or thinking;
- feeling like you might pass out;
- double vision or other vision problems;
- new or worsening muscle pain, cramps, soreness, or weakness, and/or dark urine;
- unusual bleeding or signs of infection around the microinfusion entry or catheter exit sites;
What are the precautions when taking ziconotide (Prialt)?
Before using ziconotide, tell your doctor or pharmacist if you are allergic to it; or if you have any other allergies. This product may contain inactive ingredients, which can cause allergic reactions or other problems. Talk to your pharmacist for more details.
This medication should not be used if you have certain medical conditions. Before using this medicine, consult your doctor or pharmacist if you have: uncontrolled bleeding, any infection near the injection site, mental/mood disorders (e.g., depression, psychosis, thoughts of suicide), spinal canal blockage.
Before using this medication, tell your doctor or pharmacist your medical history, especially of: regular/long-term use of narcotic medication.
This medication is not a narcotic (morphine-like drug). If...
Last reviewed on RxList: 9/12/2011
This monograph has been modified to include the generic and brand name in many instances.
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