Ziprasidone

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Geodon
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Ziprasidone
Clinical data
Trade namesGeodon, Zeldox, Zipwell, other
AHFS/Drugs.comMonograph
MedlinePlusa699062
License data
Pregnancy
category
  • AU: C
Routes of
administration
By mouth, intramuscular injection (IM)
Drug classAtypical antipsychotic
ATC code
Legal status
Legal status
Pharmacokinetic data
Bioavailability60% (oral)[3]
100% (IM)
aldehyde reductase)
Elimination half-life7 to 10 hours[4]
ExcretionUrine and feces
Identifiers
  • 5-{2-[4-(1,2-benzisothiazol-3-yl)-1-piperazinyl]ethyl}-6-chloro-1,3-dihydro-2H-indol-2-one
JSmol)
  • O=C1Cc2c(N1)cc(Cl)c(c2)CCN3CCN(CC3)c4nsc5ccccc45
  • InChI=1S/C21H21ClN4OS/c22-17-13-18-15(12-20(27)23-18)11-14(17)5-6-25-7-9-26(10-8-25)21-16-3-1-2-4-19(16)28-24-21/h1-4,11,13H,5-10,12H2,(H,23,27) checkY
  • Key:MVWVFYHBGMAFLY-UHFFFAOYSA-N checkY
  (verify)
3D-animation of a ziprasidone molecule.
Ziprasidon Krka brand medicine.

Ziprasidone, sold under the brand name Geodon among others, is an

injection into a muscle (IM).[5] The IM form may be used for acute agitation in people with schizophrenia.[5]

Common side effects include

dry mouth, and twitches.[6][7] Although it can also cause weight gain, the risk is much lower than for other atypical antipsychotics.[8] How it works is not entirely clear but is believed to involve effects on serotonin and dopamine in the brain.[5]

Ziprasidone was approved for medical use in the United States in 2001.

lyophilized powder. In 2020, it was the 282nd most commonly prescribed medication in the United States, with more than 1 million prescriptions.[9][10]

Medical uses

Ziprasidone is approved by the U.S.

mixed states associated with bipolar disorder. Its intramuscular injection form is approved for acute agitation in schizophrenic patients for whom treatment with just ziprasidone is appropriate.[11]

In a 2013 study in a comparison of 15 antipsychotic drugs in effectiveness in treating schizophrenic symptoms, ziprasidone demonstrated mild-standard effectiveness. Ziprasidone was 15% more effective than lurasidone and iloperidone, approximately as effective as chlorpromazine and asenapine, and 9–13% less effective than haloperidol, quetiapine, and aripiprazole.[12] Ziprasidone is effective in the treatment of schizophrenia, though evidence from the CATIE trials suggests it is less effective than olanzapine, and equally as effective compared to quetiapine. There are higher discontinuation rates for lower doses of ziprasidone, which are also less effective than higher doses.[13]

Adverse effects

Ziprasidone (and all other second generation antipsychotics (SGAs)) received a

black box warning due to increased mortality in elderly patients with dementia-related psychosis.[14]

Sleepiness and headache are very common adverse effects (>10%).[6][7]

Common adverse effects (1–10%), include producing too much saliva or having dry mouth, runny nose, respiratory disorders or coughing, nausea and vomiting, stomach aches, constipation or diarrhea, loss of appetite, weight gain (but the smallest risk for weight gain compared to other antipsychotics[8]), rashes, fast heart beats, blood pressure falling when standing up quickly, muscle pain, weakness, twitches, dizziness, and anxiety.[6][7] Extrapyramidal symptoms are also common and include tremor, dystonia (sustained or repetitive muscle contractions), akathisia (the feeling of a need to be in motion), parkinsonism, and muscle rigidity; in a 2013 meta-analysis of 15 antipsychotic drugs, ziprasidone ranked 8th for such side effects.[15]

Ziprasidone is known to trigger mania in some bipolar patients.[16][17][18]

This medication can cause birth defects, according to animal studies, although this side effect has not been confirmed in humans.[14]

Recently, the FDA required the manufacturers of some atypical antipsychotics to include a warning about the risk of

Type II diabetes with atypical antipsychotics. Some evidence suggests that ziprasidone does not cause insulin resistance to the degree of other atypical antipsychotics, such as olanzapine. Weight gain is also less of a concern with ziprasidone compared to other atypical antipsychotics.[19][20][21][22] In fact, in a trial of long term therapy with ziprasidone, overweight patients (BMI > 27) actually had a mean weight loss overall.[14]
According to the manufacturer insert, ziprasidone caused an average weight gain of 2.2 kg (4.8 lbs), which is significantly lower than other atypical antipsychotics, making this medication better for patients that are concerned about their weight. In December 2014, the FDA warned that ziprasidone could cause a potentially fatal skin reaction,
Drug Reaction with Eosinophilia and Systemic Symptoms (DRESS), although this was believed to occur only rarely.[23]

Discontinuation

The

discontinuing antipsychotics to avoid acute withdrawal syndrome or rapid relapse.[24] Symptoms of withdrawal commonly include nausea, vomiting, and loss of appetite.[25] Other symptoms may include restlessness, increased sweating, and trouble sleeping.[25] Less commonly there may be a feeling of the world spinning, numbness, or muscle pains.[25] Symptoms generally resolve after a short period of time.[25]

There is tentative evidence that discontinuation of antipsychotics can result in psychosis.[26] It may also result in reoccurrence of the condition that is being treated.[27] Rarely tardive dyskinesia can occur when the medication is stopped.[25]

Pharmacology

Pharmacodynamics

Ziprasidone[28]
Site Ki (nM) Action Ref
SERTTooltip Serotonin transporter 112 Blocker [28]
NETTooltip Norepinephrine transporter 44 Blocker [28]
DATTooltip Dopamine transporter >10,000 ND [28]
5-HT1A 2.5–76 Partial agonist [29][30][31]
5-HT1B 0.99–4.0 Partial agonist [30][28]
5-HT1D 5.1–9.0 Partial agonist [30][28]
5-HT1E 360–1,279 ND [30][28]
5-HT2A 0.08–1.4 Antagonist [32][29][30]
5-HT2B 27.2 Antagonist [28]
5-HT2C 0.72–13 Antagonist [29]
5-HT3 >10,000 ND [28]
5-HT5A 291 ND [28]
5-HT6 61–76 Antagonist [31][29]
5-HT7 6.0–9.3 Antagonist [28][31][29]
α1A 18 Antagonist [28][31]
α1B 9.0 Antagonist [28]
α2A 160 Antagonist [28][30][31]
α2B 48 Antagonist [28][30][31]
α2C 59–77 Antagonist [28][30][31]
β1 ≥2,570 ND [30][28]
β2 >10,000 ND [30][28]
D1
30–130 ND [28][29]
D2
4.8 Antagonist [33][29][31]
D2L
4.6 Antagonist [30][34]
D2S
4.2 Antagonist [30]
D3
7.2 Antagonist [33][29][30]
D4
0.8–105 Antagonist [33][29][28]
D4.2
28–39 Antagonist [34]
D4.4
14.9 Antagonist [35]
D5
152 ND [28]
H1 15–130 Antagonist [30][29][28]
H2 3,500 ND [28]
H3 >10,000 ND [28]
H4 >10,000 ND [28]
M1 ≥300 ND [36][28][29]
M2 ≥3,000 ND [36][28]
M3 ≥1,300 ND [36][31][28]
M4 ≥1,600 ND [36][28]
M5 ≥1,600 ND [36][28]
σ1 110 ND [30]
σ2 ND ND ND
Opioid >1,000 ND [30]
nAChTooltip Nicotinic acetylcholine receptor >10,000 ND [28]
NMDA
(PCP)
>10,000 ND [28]
VDCC
Tooltip Voltage-dependent calcium channel
>10,000 ND [28][30]
VGSCTooltip Voltage-gated sodium channel 2,620 ND [30]
hERG
Tooltip Human Ether-à-go-go-Related Gene
169 Blocker [37]
Values are Ki (nM). The smaller the value, the more strongly the drug binds to the site. All data are for human cloned proteins, except H3 (guinea pig), σ1 (guinea pig), opioid (rodent), NMDA/PCP (rat), VDCC, and VGSC.[28]

Correspondence to clinical effects

Ziprasidone mostly

histamine (H1) - moderately.[40][41] It also somewhat inhibits reuptake of serotonin and norepinephrine, though not dopamine.[40][42]

Ziprasidone's efficacy in treating the positive symptoms of schizophrenia is believed to be mediated primarily via antagonism of the dopamine receptors, specifically D2. Blockade of the 5-HT2A receptor may also play a role in its effectiveness against positive symptoms, though the significance of this property in antipsychotic drugs is still debated among researchers.[43] Blockade of 5-HT2A and 5-HT2C and activation of 5-HT1A as well as inhibition of the reuptake of serotonin and norepinephrine may all contribute to its ability to alleviate negative symptoms.[44]; however, its effects on the 5-HT1A receptor may be limited as a study[45] found ziprasidone would likely "produce detectable occupancy [of 5-HT1A receptors] only at higher doses that would produce unacceptable levels of side effects in man, although lower doses are sufficient to produce pharmacological effects." The relatively weak antagonistic actions of ziprasidone on the α1-adrenergic receptor likely in part explains some of its side effects, such as orthostatic hypotension. Unlike many other antipsychotics, ziprasidone has no significant affinity for the mACh receptors, and as such lacks any anticholinergic side effects. Like most other antipsychotics, ziprasidone is sedating due primarily to serotonin and dopamine blockade.[46][47]

Pharmacokinetics

The systemic bioavailability of ziprasidone is 100% when administered intramuscularly and 60% when administered orally without food.[3]

After a single dose intramuscular administration, the peak serum concentration typically occurs at about 60 minutes after the dose is administered, or earlier.[48] Steady state plasma concentrations are achieved within one to three days. Exposure increases in a dose-related manner and following three days of intramuscular dosing, little accumulation is observed.

The bioavailability of the drug is reduced by approximately 50% if a meal is not eaten before Ziprasidone ingestion.[14][49]

Ziprasidone is hepatically metabolized by aldehyde oxidase; minor metabolism occurs via cytochrome P450 3A4 (CYP3A4).[50] Medications that induce (e.g. carbamazepine) or inhibit (e.g. ketoconazole) CYP3A4 have been shown to decrease and increase, respectively, blood levels of ziprasidone.[51][52]

Its biological half-life time is 10 hours at doses of 80–120 milligrams.[4]

History

Ziprasidone is chemically similar to

structural analogue.[54]
It was first synthesized in 1987 at the Pfizer central research campus in Groton, Connecticut.[55]

Phase I trials started in 1995.[56] In 1998 ziprasidone was approved in Sweden.[57][58] After the FDA raised concerns about long QT syndrome, more clinical trials were conducted and submitted to the FDA, which approved the drug on February 5, 2001.[56][59][60]

Society and culture

Lawsuit

In September 2009, the U.S. Justice Department announced that Pfizer had been ordered to pay a historic fine of $2.3 billion as a penalty for fraudulent marketing of several drugs, including Geodon.[61] Pfizer had illegally promoted Geodon and submitted false claims to government health care programs for uses that were not medically accepted indications. The civil settlement also resolves allegations that Pfizer paid kickbacks to health care providers to induce them to prescribe Geodon, as well as other drugs. This was the largest civil fraud settlement in history against a pharmaceutical company.[citation needed]

References

  1. FDA
    . Retrieved October 22, 2023.
  2. ^ Anvisa (March 31, 2023). "RDC Nº 784 - Listas de Substâncias Entorpecentes, Psicotrópicas, Precursoras e Outras sob Controle Especial" [Collegiate Board Resolution No. 784 - Lists of Narcotic, Psychotropic, Precursor, and Other Substances under Special Control] (in Brazilian Portuguese). Diário Oficial da União (published April 4, 2023). Archived from the original on August 3, 2023. Retrieved August 16, 2023.
  3. ^
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  5. ^ a b c d e "Ziprasidone Monograph for Professionals". Drugs.com. American Society of Health-System Pharmacists. Retrieved May 8, 2019.
  6. ^ a b c "Product Information: Zeldox IM (ziprasidone mesilate)". Australia Therapeutic Goods Administration. February 24, 2016.
  7. ^ a b c "Product Information: Zeldox (ziprasidone hydrochloride)". Australia Therapeutic Goods Administration. February 24, 2016.
  8. ^ a b FDA Psychopharmacological Drugs Advisory Committee (July 19, 2000). "Briefing Document for Zeldoz Capsules" (PDF). FDA.
  9. ^ "The Top 300 of 2020". ClinCalc. Retrieved October 7, 2022.
  10. ^ "Ziprasidone - Drug Usage Statistics". ClinCalc. Retrieved October 7, 2022.
  11. ^ "Pfizer to pay $2.3 billion to resolve criminal and civil health care liability relating to fraudulent marketing and the payment of kickbacks". Stop Medicare Fraud, US Dept of Health & Human Svc, and of US Dept of Justice. Archived from the original on August 30, 2012. Retrieved July 4, 2012.
  12. S2CID 32085212
    .
  13. .
  14. ^ a b c d "Geodon Prescribing Information" (PDF). Pfizer, Inc. Archived from the original (PDF) on October 17, 2005. Retrieved January 26, 2009.
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  23. ^ "FDA Drug Safety Communication: FDA reporting mental health drug ziprasidone (Geodon) associated with rare but potentially fatal skin reactions". FDA. December 11, 2014. Retrieved December 12, 2014.
  24. . Withdrawal of antipsychotic drugs after long-term therapy should always be gradual and closely monitored to avoid the risk of acute withdrawal syndromes or rapid relapse.
  25. ^ .
  26. .
  27. .
  28. ^ a b c d e f g h i j k l m n o p q r s t u v w x y z aa ab ac ad ae af ag ah Roth BL, Driscol J. "PDSP Ki Database". Psychoactive Drug Screening Program (PDSP). University of North Carolina at Chapel Hill and the United States National Institute of Mental Health. Retrieved August 14, 2017.
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    PMID 11513838
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  48. ^ "Ziprasidone (Professional Patient Advice)". Drugs.com. Retrieved February 2, 2016.
  49. PMID 18007569
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  56. ^ a b "Approval Package For: Application Number 20-919" (PDF). FDA Center For Drug Evaluation And Research. May 26, 1998.
  57. ^ "First Approval For Pfizer's Zeldoxs". The Pharma Letter. Retrieved October 15, 2016.
  58. ^ "Pfizer's Zeldox approvable in USA – Pharmaceutical industry news". The Pharma Letter. September 13, 2000. Retrieved October 15, 2016.
  59. ^ PsychoPharmacological Drugs Advisory Committee (July 19, 2000). "FDA Background On ZeldoxTM (ziprasidone hydrochloride capsules) Pfizer, Inc" (PDF). Center for Drug Evaluation and Research (CDER). U.S. Food and Drug Administration. Archived from the original (PDF) on July 14, 2007.
  60. ^ "Pfizer to Launch Zeldox in 9 European Union Countries Beginning Next Month". Pfizer Inc. Retrieved October 16, 2016 – via prnewswire.com.
  61. ^ "Justice Department Announces Largest Health Care Fraud Settlement in Its History". justice.gov. September 2, 2009. Retrieved October 6, 2016.

Further reading