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Yadav P, Singh Y, Chauhan D, Yadav PK, Kedar AS, Tiwari AK, Shah AA, Gayen JR, Chourasia MK. Development and approval of novel injectables: enhancing therapeutic innovations. Expert Opin Drug Deliv 2024; 21:639-662. [PMID: 38703363 DOI: 10.1080/17425247.2024.2351987] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/07/2024] [Accepted: 05/02/2024] [Indexed: 05/06/2024]
Abstract
INTRODUCTION Novel injectables possess applications in both local and systemic therapeutics delivery. The advancement in utilized materials for the construction of complex injectables has tremendously upgraded their safety and efficacy. AREAS COVERED This review focuses on various strategies to produce novel injectables, including oily dispersions, in situ forming implants, injectable suspensions, microspheres, liposomes, and antibody-drug conjugates. We herein present a detailed description of complex injectable technologies and their related drug formulations permitted for clinical use by the United States Food and Drug Administration (USFDA). The excipients used, their purpose and the challenges faced during manufacturing such formulations have been critically discussed. EXPERT OPINION Novel injectables can deliver therapeutic agents in a controlled way at the desired site. However, several challenges persist with respect to their genericization. Astronomical costs incurred by innovator companies during product development, complexity of the product itself, supply limitations with respect to raw materials, intricate manufacturing processes, patent evergreening, product life-cycle extensions, relatively few and protracted generic approvals contribute to the exorbitant prices and access crunch. Moreover, regulatory guidance are grossly underdeveloped and significant efforts have to be directed toward development of effective characterization techniques.
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Affiliation(s)
- Pooja Yadav
- Division of Pharmaceutics and Pharmacokinetics, CSIR-Central Drug Research Institute, Lucknow, India
- Academy of Scientific and Innovative Research (AcSIR), Ghaziabad, India
| | - Yuvraj Singh
- Division of Pharmaceutics and Pharmacokinetics, CSIR-Central Drug Research Institute, Lucknow, India
| | - Divya Chauhan
- Division of Pharmaceutics and Pharmacokinetics, CSIR-Central Drug Research Institute, Lucknow, India
- Academy of Scientific and Innovative Research (AcSIR), Ghaziabad, India
| | - Pavan K Yadav
- Division of Pharmaceutics and Pharmacokinetics, CSIR-Central Drug Research Institute, Lucknow, India
- Academy of Scientific and Innovative Research (AcSIR), Ghaziabad, India
| | - Ashwini S Kedar
- Division of Pharmaceutics and Pharmacokinetics, CSIR-Central Drug Research Institute, Lucknow, India
| | - Amrendra K Tiwari
- Division of Pharmaceutics and Pharmacokinetics, CSIR-Central Drug Research Institute, Lucknow, India
- Academy of Scientific and Innovative Research (AcSIR), Ghaziabad, India
| | - Aarti Abhishek Shah
- Division of Pharmaceutics and Pharmacokinetics, CSIR-Central Drug Research Institute, Lucknow, India
| | - Jiaur R Gayen
- Division of Pharmaceutics and Pharmacokinetics, CSIR-Central Drug Research Institute, Lucknow, India
- Academy of Scientific and Innovative Research (AcSIR), Ghaziabad, India
| | - Manish K Chourasia
- Division of Pharmaceutics and Pharmacokinetics, CSIR-Central Drug Research Institute, Lucknow, India
- Academy of Scientific and Innovative Research (AcSIR), Ghaziabad, India
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Ohura K, Nakada Y, Imai T. Bioconversion and P-gp-Mediated Transport of Depot Fluphenazine Prodrugs after Intramuscular Injection. J Pharm Sci 2023; 112:1975-1984. [PMID: 37019360 DOI: 10.1016/j.xphs.2023.03.018] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/17/2023] [Revised: 03/26/2023] [Accepted: 03/26/2023] [Indexed: 04/07/2023]
Abstract
Fluphenazine (FPZ) decanoate, an ester-type prodrug formulated as a long-acting injection (LAI), is used in the treatment of schizophrenia. FPZ enanthate was also developed as an LAI formulation, but is no longer in use clinically because of the short elimination half-life of FPZ, the parent drug, after intramuscular injection. In the present study, the hydrolysis of FPZ prodrugs was evaluated in human plasma and liver to clarify the reason for this difference in elimination half-lives. FPZ prodrugs were hydrolyzed in human plasma and liver microsomes. The rate of hydrolysis of FPZ enanthate in human plasma and liver microsomes was 15-fold and 6-fold, respectively, faster than that of FPZ decanoate. Butyrylcholinesterase (BChE) and human serum albumin (HSA) present in human plasma, and two carboxylesterase (CES) isozymes, hCE1 and hCE2, expressed in ubiquitous organs including liver, were mainly responsible for the hydrolysis of FPZ prodrugs. FPZ prodrugs may not be bioconverted in human skeletal muscle at the injection site because of lack of expression of BChE and CESs in muscle. Interestingly, although FPZ was a poor substrate for human P-glycoprotein, FPZ caproate was a good substrate. In conclusion, it is suggested that the shorter elimination half-life of FPZ following administration of FPZ enanthate compared with FPZ decanoate can be attributed to the more rapid hydrolysis of FPZ enanthate by BChE, HSA and CESs.
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Affiliation(s)
- Kayoko Ohura
- Graduate School of Pharmaceutical Sciences, Kumamoto University, Kumamoto, Japan; Headquarters for Admissions and Education, Kumamoto University, Kumamoto, Japan
| | | | - Teruko Imai
- Graduate School of Pharmaceutical Sciences, Kumamoto University, Kumamoto, Japan; Daiichi University of Pharmacy, Fukuoka, Japan.
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Gaekens T, Guillaume M, Borghys H, De Zwart LL, de Vries R, Embrechts RCA, Vermeulen A, Megens AAHP, Leysen JE, Herdewijn P, Annaert PP, Atack JR. Lipophilic nalmefene prodrugs to achieve a one-month sustained release. J Control Release 2016; 232:196-202. [PMID: 27107723 DOI: 10.1016/j.jconrel.2016.04.029] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/17/2015] [Revised: 04/18/2016] [Accepted: 04/18/2016] [Indexed: 11/18/2022]
Abstract
Nalmefene is an opioid antagonist which as a once-a-day tablet formulation has recently been approved for reducing ethanol intake in alcoholic subjects. In order to address the compliance issue in this patient population, a number of potential nalmefene prodrugs were synthesized with the aim of providing a formulation that could provide plasma drug concentrations in the region of 0.5-1.0ng/mL for a one-month period when dosed intramuscular to dogs or minipigs. In an initial series of studies, three different lipophilic nalmefene derivatives were evaluated: the palmitate (C16), the octadecyl glutarate diester (C18-C5) and the decyl carbamate (CB10). They were administered intramuscularly to dogs in a sesame oil solution at a dose of 1mg-eq. nalmefene/kg. The decyl carbamate was released relatively quickly from the oil depot and its carbamate bond was too stable to be used as a prodrug. The other two derivatives delivered a fairly constant level of 0.2-0.3ng nalmefene/mL plasma for one month and since there was no significant difference between these two, the less complex palmitate monoester was chosen to demonstrate that dog plasma nalmefene concentrations were dose-dependent at 1, 5 and 20mg-eq. nalmefene/kg. In a second set of experiments, the effect of the chain length of the fatty acid monoester promoieties was examined. The increasingly lipophilic octanoate (C8), decanoate (C10) and dodecanoate (C12) derivatives were evaluated in dogs and in minipigs, at a dose of 5mg-eq. nalmefene/kg and plasma nalmefene concentrations were measured over a four-week period. The pharmacokinetic profiles were very similar in both species with Cmax decreasing and Tmax increasing with increasing fatty acid chain length and the target plasma concentrations (0.5-1.0ng/mL over a month-long period) were achieved with the dodecanoate (C12) prodrug. These data therefore demonstrate that sustained plasma nalmefene concentrations can be achieved in both dog and minipig using nalmefene prodrugs and that the pharmacokinetic profile of nalmefene can be tuned by varying the length of the alkyl group.
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Affiliation(s)
- Tim Gaekens
- API Small Molecule Development, Janssen Pharmaceuticals, Turnhoutseweg 30, B-2340 Beerse, Belgium
| | - Michel Guillaume
- API Small Molecule Development, Janssen Pharmaceuticals, Turnhoutseweg 30, B-2340 Beerse, Belgium
| | - Herman Borghys
- Neuroscience, Janssen Pharmaceuticals, Turnhoutseweg 30, B-2340 Beerse, Belgium
| | - Loeckie L De Zwart
- Drug Metabolism and Pharmacokinetics, Janssen Pharmaceuticals, Turnhoutseweg 30, B-2340 Beerse, Belgium
| | - Ronald de Vries
- Drug Metabolism and Pharmacokinetics, Janssen Pharmaceuticals, Turnhoutseweg 30, B-2340 Beerse, Belgium
| | - Roger C A Embrechts
- Drug Product Development, Janssen Pharmaceuticals, Turnhoutseweg 30, B-2340 Beerse, Belgium
| | - An Vermeulen
- Clinical Pharmacology, Janssen Pharmaceuticals, Turnhoutseweg 30, B-2340 Beerse, Belgium
| | - Anton A H P Megens
- Neuroscience, Janssen Pharmaceuticals, Turnhoutseweg 30, B-2340 Beerse, Belgium
| | - Josée E Leysen
- Neuroscience, Janssen Pharmaceuticals, Turnhoutseweg 30, B-2340 Beerse, Belgium; Department of Nuclear Medicine and PET Research, VU University Medical Centre, P.O. Box 7057, 1007 MB Amsterdam, The Netherlands
| | - Piet Herdewijn
- Laboratory of Medicinal Chemistry, Rega Institute for Medical Research, Katholieke Universiteit Leuven, Minderbroedersstraat 10, Box 1030, B-3000 Leuven, Belgium
| | - Pieter P Annaert
- Laboratory for Pharmacotechnology and Biopharmacy, Katholieke Universiteit Leuven, O&N2, Herestraat 49-Box 921, B-3000 Leuven, Belgium
| | - John R Atack
- Neuroscience, Janssen Pharmaceuticals, Turnhoutseweg 30, B-2340 Beerse, Belgium.
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Remenar JF. Making the leap from daily oral dosing to long-acting injectables: lessons from the antipsychotics. Mol Pharm 2014; 11:1739-49. [PMID: 24679167 DOI: 10.1021/mp500070m] [Citation(s) in RCA: 58] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
There are now long-acting versions of six antipsychotic drugs on the U.S. market, and with them, five unique combinations of molecular form and delivery strategy long-acting-injectable-antipsychotics (LAIAs) show evidence of reduced relapses of schizophrenia, but their introduction has been slow, taking at least nine years after the approval of each oral drug. Oily solutions of lipophilic prodrugs were the first to enter the LAIA market, but they relied on esterification of a hydroxyl handle that was lost with the emergence of the atypical antipsychotics. A review of the literature and patents shows that companies tested many different approaches before reaching the currently marketed versions, including aqueous suspensions of poorly soluble salts, polymeric microspheres, and new approaches to making prodrugs. Yet, very little has been published to support faster development of safe long-acting injectables (LAIs). This review introduces some of the critical considerations in creating an LAI; then it analyzes the existing products and discusses areas where further research is needed. The available literature suggests that lipophilic prodrugs may be inherently safer than poorly soluble salts as LAIs. Other areas needing additional study include (1) the range of physical properties acceptable for LAIs and the effect of prodrug tail length in achieving them, and (2) the role of physiological responses at the injection site in the release of drug from a depot.
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Affiliation(s)
- Julius F Remenar
- Alkermes, plc, 852 Winter Street, Waltham, Massachusetts 02451-1420, United States
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Wei XL, Han YR, Quan LH, Liu CY, Liao YH. Oily nanosuspension for long-acting intramuscular delivery of curcumin didecanoate prodrug: preparation, characterization and in vivo evaluation. Eur J Pharm Sci 2013; 49:286-93. [PMID: 23542494 DOI: 10.1016/j.ejps.2013.03.010] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/26/2012] [Revised: 03/18/2013] [Accepted: 03/20/2013] [Indexed: 10/27/2022]
Abstract
The objective of this study was to prepare the nanocrystals of curcumin didecanoate (CurDD) by wet ball milling and to investigate the comparative pharmacokinetics of oily nano- and micro-suspensions after intramuscular (i.m.) administration to rats. Upon optimizing the wet ball milling parameters, CurDD nanocrystals were produced with median particle size of ~500 nm and the freeze-dried nanocrystals were readily dispersed in peanut oil to form stable nanosuspensions. Although the nanosuspension appeared to exhibit slower clearance from the injection site after i.m. injection, compared to microsuspension (~5 μm), a significantly higher maximum plasma curcumin concentration (69.0 ng/ml) was observed for the former than that for the latter (18.5 ng/ml). In addition, the nanosuspension provided significant higher plasma curcumin concentrations and brain CurDD contents for at least 15 days than the microsuspension, except for the initial times. A single i.m. injection of nanosuspension appeared to achieve reversal effect on reserpine-induced hypothermia for at least 13 days. This study demonstrates that CurDD nanosuspension may act as a long-acting i.m. injectable for sustained delivery of curcumin, potentially applicable to elicit a long-lasting antidepressant effect.
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Affiliation(s)
- Xiao-Lan Wei
- Institute of Medicinal Plant Development, Chinese Academy of Medical Sciences & Peking Union Medical College, 151 Malianwa North Road, Haidian District, Beijing 100193, PR China
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Larsen C, Larsen SW, Jensen H, Yaghmur A, Ostergaard J. Role of in vitro release models in formulation development and quality control of parenteral depots. Expert Opin Drug Deliv 2010; 6:1283-95. [PMID: 19941410 DOI: 10.1517/17425240903307431] [Citation(s) in RCA: 71] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/21/2023]
Abstract
This review article provides an assessment of advantages/limitations of the use of current in vitro release models to predict in vivo performance of parenteral sustained release products (injectable depots). As highlighted, key characteristics influencing the in vivo drug fate may vary with the route of administration and the type of sustained release formulation. To this end, an account is given on three representative injection sites (intramuscular, subcutaneous and intra-articular) as well as on in vitro release mechanism(s) of drugs from five commonly investigated depot principles (suspensions, microspheres, hydrogels, lipophilic solutions, and liposomes/other nano-size formulations). Current in vitro release models are, to a different extent, able to mimic the rate, transport and equilibrium processes that the drug substance may experience in the environment of the administration site. Their utility for the purpose of quality control including in vitro-in vivo correlations and formulation design is discussed.
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Affiliation(s)
- Claus Larsen
- University of Copenhagen, Department of Pharmaceutics and Analytical Chemistry, Faculty of Pharmaceutical Sciences, Universitetsparken 2, DK-2100 Copenhagen, Denmark.
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Weng Larsen S, Larsen C. Critical factors influencing the in vivo performance of long-acting lipophilic solutions--impact on in vitro release method design. AAPS JOURNAL 2009; 11:762-70. [PMID: 19894123 DOI: 10.1208/s12248-009-9153-9] [Citation(s) in RCA: 38] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/14/2009] [Accepted: 10/18/2009] [Indexed: 02/03/2023]
Abstract
Parenteral long-acting lipophilic solutions have been used for decades and might in the future be used in the design of depots with tailored delivery characteristics. The present review highlights major factors influencing the in vivo performance of lipophilic solutions. Furthermore, an account is given of the characteristics of employed in vitro release methods with a focus on the "state" of sink condition, the stirring conditions, and the oil-water interfacial area. Finally, the capability of in vitro release data to predict the in vivo performance of drug substances administrated in the form of lipophilic solutions is discussed. It is suggested that as long as the major rate-limiting in vivo release mechanism is governed by the drug partitioning between the oil vehicle and the tissue fluid, the use of in vitro release testing in quality control appears to be realistic. With increasing lipophilicity of the drug substances and longer duration of action, the in vivo drug release process may become more complex. As discussed, practical analytical problems together with the inability of release methods to mimic two or more concomitant in vivo events may constitute severe impediments for establishment of in vitro in vivo correlations.
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Affiliation(s)
- Susan Weng Larsen
- Department of Pharmaceutics and Analytical Chemistry, Faculty of Pharmaceutical Sciences, University of Copenhagen, Universitetsparken 2, DK-2100, Copenhagen, Denmark.
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Larsen SW, Rinvar E, Svendsen O, Lykkesfeldt J, Friis GJ, Larsen C. Determination of the disappearance rate of iodine-125 labelled oils from the injection site after intramuscular and subcutaneous administration to pigs. Int J Pharm 2001; 230:67-75. [PMID: 11672957 DOI: 10.1016/s0378-5173(01)00860-2] [Citation(s) in RCA: 16] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
Abstract
The rate of disappearance of clinically used vegetable oils, Viscoleo, sesame oil, castor oil and isopropyl myristate, from the injection site after intramuscular (i.m.) or subcutaneous (s.c.) administration to pigs were determined by using a non-invasive gamma-scintigraphy method. All the oil vehicles were spiked with 2.5% (v/v) (125)I-triolein and six injections of 1.9 ml were given to each of 12 pigs. No significant difference (ANOVA) in disappearance rate of each individual oil vehicle from the different injection sites was observed after administration of the oils: i.m. in the lower back, s.c. in the neck and s.c. in the mid-back. Likewise, no inter-individual difference between the pigs was observed. The half-life of 14 days for Viscoleo was significantly smaller than those of the other oil vehicles (P<0.0001), i.e. 23,20,20 days for sesame oil, castor oil and isopropyl myristate, respectively. Due to the spreading effect of the oils and reflux of the oils through the injection canal, the half-lives were calculated omitting the data for the first sampling day.
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Affiliation(s)
- S W Larsen
- Department of Analytical and Pharmaceutical Chemistry, The Royal Danish School of Pharmacy, Universitetsparken 2, DK-2100, Copenhagen, Denmark.
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