Benserazide
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Identification
- Summary
Benserazide is a medication used to treat Parkinson's disease, parkinsonism, and restless leg syndrome.
- Brand Names
- Prolopa
- Generic Name
- Benserazide
- DrugBank Accession Number
- DB12783
- Background
When levodopa is used by itself as a therapy for treating Parkinson's disease, its ubiquitous metabolism into dopamine is responsible for a resultant increase in the levels of circulating dopamine in the blood and to various extracerebral tissues. This can result in a number of side effects like nausea, vomiting, or even cardiac arrhythmias that may diminish patient adherence 3,2. A decarboxylase inhibitor like benserazide is consequently an effective compound to combine with levadopa as it is incapable of crossing the blood-brain barrier itself but acts to prevent the formation of dopamine from levadopa in extracerebral tissues - thereby acting to minimize the occurrence of extracerebral side effects 3,2.
Levodopa/benserazide combination products are used commonly worldwide for the management of Parkinson's disease. In particular, although the specific levodopa/benserazide combination is formally approved for use in Canada and much of Europe, the FDA has approved another similar levodopa/dopa decarboxylase inhibitor combination in the form of levodopa and carbidopa.
Moreover, the European Medcines Agency has conferred an orphan designation upon benseraside since 2015 for its potential to be used as a therapy for beta thalassaemia as well 4.
- Type
- Small Molecule
- Groups
- Approved, Investigational
- Structure
- Weight
- Average: 257.246
Monoisotopic: 257.101170595 - Chemical Formula
- C10H15N3O5
- Synonyms
- benserazida
- Benserazide
- benserazidum
- External IDs
- RO 4-4602
- RO-4-4602
Pharmacology
- Indication
The primary therapeutic use for which benserazide is currently indicated for is as a combination therapy with levadopa for the treatment of Parkinson's disease in adults > 25 years of age, with the exception of drug-induced parkinsonism 3,2.
At certain doses, the combination product of levodopa and benserazide may also be used to treat restless legs syndrome, which is sometimes associated with Parkinson's disease 2,1.
There have also been some studies that have prompted the European Medicines Agency to confer orphan designation upon benserazide hydrochloride as a potential therapy for beta thalassaemia 4. Although studies are ongoing, no evidence has been formally elucidated as of yet 4.
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Indication Type Indication Combined Product Details Approval Level Age Group Patient Characteristics Dose Form Used in combination to manage Parkinson's disease Combination Product in combination with: Levodopa (DB01235) •••••••••••• - Contraindications & Blackbox Warnings
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- Pharmacodynamics
When used as a therapy for treating Parkinson's disease, levadopa's specific mechanism of action revolves around its metabolism into dopamine in the body 3,2. Unfortunately, the resultant increase in the levels of circulating dopamine in the blood and to various extracerebral tissues can result in a number of side effects like nausea, vomiting, or even cardiac arrhythmias that may diminish patient adherence 3,2. A decarboxylase inhibitor like benserazide is consequently an effective compound to combine with levadopa as it is incapable of crossing the blood-brain barrier itself and therefore allows levadopa to elicit its primary action in the central nervous system, but will prevent the formation of dopamine from levadopa in extracerebral tissues - thereby acting to minimize the occurrence of extracerebral side effects 3,2.
- Mechanism of action
The combination of levodopa and benserazide is an anti-Parkinsonian agent 3,2. Levodopa itself is the metabolic precursor of dopamine. In Parkinson's disease, dopamine is depleted to a large degree in the striatum, pallidum, and substantia nigra in the central nervous system (CNS) 3,2. The administration of levodopa to treat the disease is subsequently proposed to facilitate raises in the levels of available dopamine in these areas 3,2. The metabolism of levodopa to dopamine occurs via the enzyme dopa decarboxylase, although unfortunately, this metabolism can also occur in extracerebral tissues 3,2. As a result, the full therapeutic effect of an administered dose of levodopa may not be obtained if portions of it are catabolized outside of the CNS and various patient adherence diminishing extracerebral side effects due to the extracerebral presence of dopamine like nausea, vomiting, or even cardiac arrhythmias can also happen 3,2.
Subsequently, a peripheral decarboxylase inhibitor like benserazide, which blocks the extracerebral decarboxylation of levodopa, when administered in combination with levodopa has obvious and significant advantages. Such benefits include reduced gastrointestinal side effects, a more rapid and complete response at the initiation of therapy, and a simpler dosing regimen 3,2.
It is important to note, however, that benserazide is hydroxylated to trihydroxybenzylhydrazine in the intestinal mucosa and the liver 3,2, and that as a potent inhibitor of the aromatic amino acid decarboxylase 3,2,1, it is this trihydroxybenzylhydrazine metabolite of benserazide that mainly protects levodopa against decarboxylation to dopamine in the gut and also around the rest of the body outside of the blood-brain barrier 1.
Regardless, because Parkinson's disease progresses even with the therapy of levodopa and benserazide, this kind of combined therapy is only ever indicated if it is capable of improving the quality of life and adverse effect profile of using such drugs for Parkinson's patients and there is little to be gained by switching to or starting this combination therapy if patients are already being managed with stable, effective, and well-tolerated levadopa-only therapy 3,2.
Finally, it is also proposed that benserazide hydrochloride may be able to treat beta thalassaemia by maintaining the active expression of the gene for fetal hemoglobin so that constant production of fetal hemoglobin may replace the missing adult hemoglobin variation that is characteristic of patients with the condition, thereby decreasing the need for blood transfusion therapy 4.
Target Actions Organism AAromatic-L-amino-acid decarboxylase inhibitorHumans - Absorption
In a study, three patients were administered 50 mg of radiolabelled 14C-benserazide by both intravenous and oral routes 3,2. Three additional patients received oral doses of 50 mg 14C-benserazide alone 3,2. Comparison of the time-plasma concentration curves of total radioactivity in the patients receiving oral and intravenous 14C-benserazide indicated that between 66% and 74% of the administered dose was absorbed from the gastrointestinal tract 3,2. Peak plasma concentrations of radioactivity were detected one hour after oral administration in five of the six patients 3,2.
- Volume of distribution
Readily accessible data regarding the volume of distribution of benserazide is not available 1.
- Protein binding
Benserazide is observed as experiencing 0% protein binding 1.
- Metabolism
Benserazide is hydrolyzed to trihydroxybenzylhydrazine in the intestinal mucosa and the liver.3,2 Trihydroxybenzylhydrazine is a potent inhibitor of the aromatic acid decarboxylase,3,2 and it is believed that the levodopa in a levodopa/benserazide combination product is largely protected against decarboxylation mainly by way of this benserazide metabolite.1
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- Route of elimination
Benserazide is rapidly excreted in the urine in the form of metabolites, mostly within the first 6 hours of administration, 85% of urinary excretion occurs within 12 hours 1.
Elimination of radiolabelled 14C-benserazide was primarily by urinary excretion with 86% to 90% of an intravenous dose recovered in the urine while 53% to 64% of an oral dose was detected in the urine 3,2. The majority of the 14C-benserazide was ultimately accounted for in the urine within 48 hours after administration 3,2. Fecal recovery studies conducted over five to eight days accounted for the majority (about 30%) of the remainder of the administered 14C-benserazide 3,2.
Ultimately, benserazide is almost entirely eliminated by metabolism 3,2. These metabolites are mainly excreted in the urine (64%) and to a smaller extent in the feces (24%) 3,2.
- Half-life
The half-life of benserazide is documented as 1.5 hours 1.
- Clearance
Readily accessible data regarding the clearance of benserazide is not available.
- Adverse Effects
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- Toxicity
Overdosage may lead to cardiovascular side effects like cardiac arrhythmias, psychiatric disturbances like confusion and insomnia, gastrointestinal effects like nausea and vomiting, and abnormal involuntary movements 3,2.
Various LD50 values have been established for the rat model, including an oral LD50 of 5300 mg/kg in rats MSDS.
- Pathways
- Not Available
- Pharmacogenomic Effects/ADRs
- Not Available
Interactions
- Drug Interactions
- This information should not be interpreted without the help of a healthcare provider. If you believe you are experiencing an interaction, contact a healthcare provider immediately. The absence of an interaction does not necessarily mean no interactions exist.
Drug Interaction Integrate drug-drug
interactions in your softwareAbacavir Abacavir may decrease the excretion rate of Benserazide which could result in a higher serum level. Aceclofenac Aceclofenac may decrease the excretion rate of Benserazide which could result in a higher serum level. Acemetacin Acemetacin may decrease the excretion rate of Benserazide which could result in a higher serum level. Acetaminophen Acetaminophen may decrease the excretion rate of Benserazide which could result in a higher serum level. Acetazolamide Acetazolamide may increase the excretion rate of Benserazide which could result in a lower serum level and potentially a reduction in efficacy. - Food Interactions
- Take with or without food. Benserazide is normally given in combination with levodopa as the combination product Prolopa. Levodopa should not be given with protein-rich foods as they may reduce its absorption.
Products
- Drug product information from 10+ global regionsOur datasets provide approved product information including:dosage, form, labeller, route of administration, and marketing period.Access drug product information from over 10 global regions.
- Product Ingredients
Ingredient UNII CAS InChI Key Benserazide hydrochloride B66E5RK36Q 14919-77-8 ULFCBIUXQQYDEI-UHFFFAOYSA-N - Mixture Products
Name Ingredients Dosage Route Labeller Marketing Start Marketing End Region Image LEPARSON Benserazide (25 mg) + Levodopa (100 mg) Tablet Oral Dexa Medica 2018-10-02 2023-08-28 Indonesia LEVAZIDE Benserazide hydrochloride (25 mg) + Levodopa (100 mg) Tablet Oral Pyridam Farma Tbk 2017-11-24 2027-02-19 Indonesia LEVOBEN Benserazide (25 mg) + Levodopa (100 mg) Tablet; Tablet, film coated Oral Mersifarma Tirmaku Mercusana 2018-12-31 2027-12-17 Indonesia LEVOBENS TEVA 100MG/25MG Benserazide hydrochloride (28.54 mg) + Levodopa (100 mg) Capsule Oral 2014-04-01 Not applicable Germany LEVODOPA BENS -CT 100MG/25 Benserazide hydrochloride (28.54 mg) + Levodopa (100 mg) Tablet Oral 2014-04-01 Not applicable Germany
Categories
- Drug Categories
- Chemical TaxonomyProvided by Classyfire
- Description
- This compound belongs to the class of organic compounds known as serine and derivatives. These are compounds containing serine or a derivative thereof resulting from reaction of serine at the amino group or the carboxy group, or from the replacement of any hydrogen of glycine by a heteroatom.
- Kingdom
- Organic compounds
- Super Class
- Organic acids and derivatives
- Class
- Carboxylic acids and derivatives
- Sub Class
- Amino acids, peptides, and analogues
- Direct Parent
- Serine and derivatives
- Alternative Parents
- 5-unsubstituted pyrrogallols / 1-hydroxy-4-unsubstituted benzenoids / 1-hydroxy-2-unsubstituted benzenoids / Benzene and substituted derivatives / Carboxylic acid hydrazides / Polyols / Primary alcohols / Organopnictogen compounds / Organic oxides / Monoalkylamines show 2 more
- Substituents
- 1-hydroxy-2-unsubstituted benzenoid / 1-hydroxy-4-unsubstituted benzenoid / 5-unsubstituted pyrrogallol / Alcohol / Amine / Aromatic homomonocyclic compound / Benzenetriol / Benzenoid / Carbonyl group / Carboxylic acid hydrazide show 15 more
- Molecular Framework
- Aromatic homomonocyclic compounds
- External Descriptors
- carbohydrazide, catechols, primary alcohol, primary amino compound (CHEBI:64187)
- Affected organisms
- Not Available
Chemical Identifiers
- UNII
- 762OS3ZEJU
- CAS number
- 322-35-0
- InChI Key
- BNQDCRGUHNALGH-UHFFFAOYSA-N
- InChI
- InChI=1S/C10H15N3O5/c11-6(4-14)10(18)13-12-3-5-1-2-7(15)9(17)8(5)16/h1-2,6,12,14-17H,3-4,11H2,(H,13,18)
- IUPAC Name
- 2-amino-3-hydroxy-N'-[(2,3,4-trihydroxyphenyl)methyl]propanehydrazide
- SMILES
- NC(CO)C(=O)NNCC1=C(O)C(O)=C(O)C=C1
References
- General References
- Caroline Ashley, Aileen Dunleavy (2017). The Renal Drug Handbook: The Ultimate Prescribing Guide for Renal Practitioners (4th ed.). CRC Press. [ISBN:1498794610]
- Electronic Medicines Compendium: Madopar (levodopa/benserazide hydrochloride) 200mg/50mg Hard Capsules Monograph [Link]
- Roche Canada Product Monograph: Prolopa [File]
- European Medicines Agency Public Summary of Opinion on Orphan Designation: Benserazide Hydrochloride for the Treatment of Beta Thalassaemia Intermedia and Major [File]
- AGNP Consensus Guidelines for Therapeutic Drug Monitoring in Psychiatry: Update 2011 [File]
- External Links
- Human Metabolome Database
- HMDB0248960
- KEGG Drug
- D03082
- PubChem Compound
- 2327
- PubChem Substance
- 347828964
- ChemSpider
- 2237
- BindingDB
- 49122
- 1374
- ChEBI
- 64187
- ChEMBL
- CHEMBL1096979
- PharmGKB
- PA165360203
- Wikipedia
- Benserazide
- MSDS
- Download (25.4 KB)
Clinical Trials
- Clinical Trials
Clinical Trial & Rare Diseases Add-on Data Package
Explore 4,000+ rare diseases, orphan drugs & condition pairs, clinical trial why stopped data, & more. Preview package Phase Status Purpose Conditions Count Start Date Why Stopped 100+ additional columns Unlock 175K+ rows when you subscribe.View sample dataNot Available Completed Treatment Aphasia 1 somestatus stop reason just information to hide Not Available Recruiting Basic Science Hormonal Changes / Menstrual Cycles 1 somestatus stop reason just information to hide 4 Completed Not Available Healthy Volunteers (HV) 1 somestatus stop reason just information to hide 4 Completed Treatment Parkinson's Disease (PD) 1 somestatus stop reason just information to hide 3 Completed Treatment Parkinson's Disease (PD) 2 somestatus stop reason just information to hide
Pharmacoeconomics
- Manufacturers
- Not Available
- Packagers
- Not Available
- Dosage Forms
Form Route Strength Tablet; tablet, film coated Oral Capsule Oral 28.5 mg Tablet, soluble Oral Tablet Oral 50 mg Capsule, extended release Oral Tablet Oral 25 mg Capsule Oral 25 mg Capsule, delayed release Oral Tablet, for solution; tablet, for suspension Oral Capsule Oral Tablet Oral - Prices
- Not Available
- Patents
- Not Available
Properties
- State
- Not Available
- Experimental Properties
- Not Available
- Predicted Properties
Property Value Source Water Solubility 5.15 mg/mL ALOGPS logP -2.3 ALOGPS logP -1.9 Chemaxon logS -1.7 ALOGPS pKa (Strongest Acidic) 8.66 Chemaxon pKa (Strongest Basic) 7.48 Chemaxon Physiological Charge 1 Chemaxon Hydrogen Acceptor Count 7 Chemaxon Hydrogen Donor Count 7 Chemaxon Polar Surface Area 148.07 Å2 Chemaxon Rotatable Bond Count 5 Chemaxon Refractivity 73.23 m3·mol-1 Chemaxon Polarizability 24.49 Å3 Chemaxon Number of Rings 1 Chemaxon Bioavailability 1 Chemaxon Rule of Five No Chemaxon Ghose Filter No Chemaxon Veber's Rule No Chemaxon MDDR-like Rule No Chemaxon - Predicted ADMET Features
- Not Available
Spectra
- Mass Spec (NIST)
- Not Available
- Spectra
- Chromatographic Properties
Collision Cross Sections (CCS)
Adduct CCS Value (Å2) Source type Source [M-H]- 161.41017 predictedDeepCCS 1.0 (2019) [M+H]+ 163.76817 predictedDeepCCS 1.0 (2019) [M+Na]+ 169.86133 predictedDeepCCS 1.0 (2019)
Targets
- Kind
- Protein
- Organism
- Humans
- Pharmacological action
- Yes
- Actions
- Inhibitor
- General Function
- Catalyzes the decarboxylation of L-3,4-dihydroxyphenylalanine (DOPA) to dopamine and L-5-hydroxytryptophan to serotonin
- Specific Function
- 5-hydroxy-L-tryptophan decarboxylase activity
- Gene Name
- DDC
- Uniprot ID
- P20711
- Uniprot Name
- Aromatic-L-amino-acid decarboxylase
- Molecular Weight
- 53925.815 Da
References
- Zhou Y, Zhang Y, Zhao D, Yu X, Shen X, Zhou Y, Wang S, Qiu Y, Chen Y, Zhu F: TTD: Therapeutic Target Database describing target druggability information. Nucleic Acids Res. 2024 Jan 5;52(D1):D1465-D1477. doi: 10.1093/nar/gkad751. [Article]
Drug created at October 21, 2016 00:13 / Updated at June 14, 2024 18:55