Do I need a prescription for Citrulline 500mg/5ml oral solution?

Citrulline 500mg/5ml oral solution is classified as a Valid as a prescribable product in the UK. However, always consult a pharmacist or doctor before use. (Source: NHS dm+d)

What are the brand names for Citrulline 500mg/5ml oral solution?

Citrulline 500mg/5ml oral solution is the generic name. It is available under brand names including: Citrulline 500mg/5ml oral solution. (Source: NHS dm+d — Actual Medicinal Products)

Citrulline 500mg/5ml oral solution

Prescription only

Requires a prescription from a doctor or prescriber

Oral solution

500mg/5ml

Oral

Citrulline is an amino acid.

Active ingredients:

Citrulline

BNF classificationBrowse formulary

Where this medicine sits in the British National Formulary — the UK's standard prescribing reference

BNF 09.11.01

Chemical classBrowse classes

Classification based on the molecule's chemical structure and properties

Check interactions for Citrulline

No active safety alerts

Official documents, adverse reaction reporting, and safety monitoring

Report a side effect

Submit a Yellow Card report to the MHRA

Official medicine documents

Yellow Card

Report side effects (MHRA)

Drug safety updates

MHRA alerts for Citrulline

Source: MHRA Products DatabaseOGL 3.0

Updated 3 months ago(16 Jan 2026)

Safety monitoring data

Yellow Card reports

MHRA

The MHRA Yellow Card scheme collects reports of suspected side effects from healthcare professionals and patients. View the Drug Analysis Profile (iDAP) for real-world adverse reaction data.

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Data from the MHRA Yellow Card scheme. A reported reaction does not necessarily mean the medicine caused it. Contains public sector information licensed under the Open Government Licence v3.0.

EudraVigilance

EMA

The European Medicines Agency (EMA) collects suspected adverse reaction reports from across the EU/EEA through the EudraVigilance system. Search for safety data on this medicine.

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Browse substances A–Z in the European adverse reaction database

About EudraVigilance

Learn about EU pharmacovigilance and safety monitoring

EudraVigilance data is published by the European Medicines Agency (EMA). A suspected adverse reaction is not necessarily caused by the medicine.

1 branded products available

1 productsShow details

1 products

Possibly available on the UK marketRestricted supplyDiscontinuedAvailability per NHS dm+d

MHRA licensed products

View all licensed products for Citrulline on the MHRA register

Citrulline 500mg/5ml oral solution

Special Order

None

Special

Source: NHS dm+dOGL 3.0

Updated about 1 month ago(1 Mar 2026)

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Same BNF section

Ubidecarenone 25mg/5ml oral solution sugar free

Oral solution

25mg/5ml

Same BNF section

Ubidecarenone 50mg/5ml oral solution sugar free

Oral solution

50mg/5ml

Same BNF section

Similarity based on WHO Anatomical Therapeutic Chemical (ATC) classification and NHS BNF section grouping. Source data: NHS dm+d via TRUD (OGL v3.0), WHO ATC/DDD Index.

NHS prescribing volume and spending trends

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Clinical guidelines and formulary information

British National Formulary

Citrulline

BNF

Drug monograph — bnf.nice.org.uk

Source: British National Formulary, NICE. Joint Formulary Committee. Contains public sector information licensed under the Open Government Licence v3.0.

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Discontinuations & alternatives for Citrulline

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Codes for healthcare professionals and prescribing systems

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These codes are used by healthcare IT systems and prescribers to identify this medicine.

NHS UK identifiers

SNOMED CT

18519111000001104

dm+d ID

18519111000001104

VTM (Virtual Therapeutic Moiety)

775275002

VMP (Virtual Medicinal Product)

18519111000001104

BNF code

09110100

SNOMED CT and dm+d codes from NHS TRUD (Technology Reference data Update Distribution), licensed under the Open Government Licence v3.0. BNF codes from NHS Business Services Authority (NHSBSA).

Active and completed clinical studies from ClinicalTrials.gov

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Searching UK clinical trials...

Source: ClinicalTrials.gov, a database of the U.S. National Library of Medicine (NLM), National Institutes of Health (NIH). Data accessed via ClinicalTrials.gov API v2. Trial information is provided for research purposes and does not constitute medical advice.

Pharmacology and chemical data from DrugBank

go.drugbank.com

Key facts

Drug status

Investigational

Major interactions

None known

Half-life

Not available

Mechanism

L-citrulline is converted to L-arginine by argininosuccinate synthase.

Food interactions

None known

Human targets

12 targets

Data: DrugBank · CC BY-NC 4.0

Pharmacokinetics at a glance

Status:

Investigational

Nutraceutical

Small molecule

About this compound

Citrulline is an amino acid. It is made from ornithine and carbamoyl phosphate in one of the central reactions in the urea cycle. It is also produced from arginine as a by-product of the reaction catalyzed by NOS family. Its name is derived from citrullus, the Latin word for watermelon, from which it was first isolated.

Properties:

solid

Avg. mass: 175.19 Da

DrugBank indication

Used for nutritional supplementation, also for treating dietary shortage or imbalance.

Also known as(104)

(S)-2-Amino-5-ureidopentanoic acid

2-Amino-5-ureidovaleric acid

alpha-amino-delta-Ureidovaleric acid

Cit

Citrulina

Citrulline

delta-Ureidonorvaline

L-2-Amino-5-ureidovaleric acid

Dosage forms(5)

Injection (Intramuscular)

Solution (Oral) — 1 g

Solution (Oral) — 1 g/10ml

Tablet (Oral)

Solution

Molecular properties(19)

Drug interactions(137)

Known interactions with other medications. Always consult a healthcare professional.

Aspartame

Unknown severity

DB00168

The excretion of Citrulline can be decreased when combined with Aspartame.

Check this interaction

Pravastatin

Unknown severity

DB00175

The excretion of Citrulline can be decreased when combined with Pravastatin.

Check this interaction

Pantoprazole

Unknown severity

DB00213

The excretion of Citrulline can be decreased when combined with Pantoprazole.

Check this interaction

Cefotiam

Unknown severity

DB00229

The excretion of Citrulline can be decreased when combined with Cefotiam.

Check this interaction

Liothyronine

Unknown severity

DB00279

The excretion of Citrulline can be decreased when combined with Liothyronine.

Check this interaction

Conjugated estrogens

Unknown severity

DB00286

The excretion of Citrulline can be decreased when combined with Conjugated estrogens.

Check this interaction

Valproic acid

Unknown severity

DB00313

The excretion of Citrulline can be decreased when combined with Valproic acid.

Check this interaction

Indomethacin

Unknown severity

DB00328

The excretion of Citrulline can be decreased when combined with Indomethacin.

Check this interaction

Aminohippuric acid

Unknown severity

DB00345

The excretion of Citrulline can be decreased when combined with Aminohippuric acid.

Check this interaction

Lansoprazole

Unknown severity

DB00448

The excretion of Citrulline can be decreased when combined with Lansoprazole.

Check this interaction

Cefalotin

Unknown severity

DB00456

The excretion of Citrulline can be decreased when combined with Cefalotin.

Check this interaction

Tenoxicam

Unknown severity

DB00469

The excretion of Citrulline can be decreased when combined with Tenoxicam.

Check this interaction

Cefotaxime

Unknown severity

DB00493

The excretion of Citrulline can be decreased when combined with Cefotaxime.

Check this interaction

Zidovudine

Unknown severity

DB00495

The excretion of Citrulline can be decreased when combined with Zidovudine.

Check this interaction

Cimetidine

Unknown severity

DB00501

The excretion of Citrulline can be decreased when combined with Cimetidine.

Check this interaction

Guanidine

Unknown severity

DB00536

The excretion of Citrulline can be decreased when combined with Guanidine.

Check this interaction

Piroxicam

Unknown severity

DB00554

The excretion of Citrulline can be decreased when combined with Piroxicam.

Check this interaction

Methotrexate

Unknown severity

DB00563

The excretion of Citrulline can be decreased when combined with Methotrexate.

Check this interaction

Cephalexin

Unknown severity

DB00567

The excretion of Citrulline can be decreased when combined with Cephalexin.

Check this interaction

Enalapril

Unknown severity

DB00584

The excretion of Citrulline can be decreased when combined with Enalapril.

Check this interaction

Diclofenac

Unknown severity

DB00586

The excretion of Citrulline can be decreased when combined with Diclofenac.

Check this interaction

Oxytetracycline

Unknown severity

DB00595

The excretion of Citrulline can be decreased when combined with Oxytetracycline.

Check this interaction

Leucovorin

Unknown severity

DB00650

The excretion of Citrulline can be decreased when combined with Leucovorin.

Check this interaction

Furosemide

Unknown severity

DB00695

The excretion of Citrulline can be decreased when combined with Furosemide.

Check this interaction

Esomeprazole

Unknown severity

DB00736

The excretion of Citrulline can be decreased when combined with Esomeprazole.

Check this interaction

Tetracycline

Unknown severity

DB00759

The excretion of Citrulline can be decreased when combined with Tetracycline.

Check this interaction

Acyclovir

Unknown severity

DB00787

The excretion of Citrulline can be decreased when combined with Acyclovir.

Check this interaction

Phenylbutazone

Unknown severity

DB00812

The excretion of Citrulline can be decreased when combined with Phenylbutazone.

Check this interaction

Cefaclor

Unknown severity

DB00833

The excretion of Citrulline can be decreased when combined with Cefaclor.

Check this interaction

Bumetanide

Unknown severity

DB00887

The excretion of Citrulline can be decreased when combined with Bumetanide.

Check this interaction

Quinidine

Unknown severity

DB00908

The excretion of Citrulline can be decreased when combined with Quinidine.

Check this interaction

Dinoprostone

Unknown severity

DB00917

The excretion of Citrulline can be decreased when combined with Dinoprostone.

Check this interaction

Famotidine

Unknown severity

DB00927

The excretion of Citrulline can be decreased when combined with Famotidine.

Check this interaction

Salicylic acid

Unknown severity

DB00936

The excretion of Citrulline can be decreased when combined with Salicylic acid.

Check this interaction

Acetylsalicylic acid

Unknown severity

DB00945

The excretion of Citrulline can be decreased when combined with Acetylsalicylic acid.

Check this interaction

Ganciclovir

Unknown severity

DB01004

The excretion of Citrulline can be decreased when combined with Ganciclovir.

Check this interaction

Ketoprofen

Unknown severity

DB01009

The excretion of Citrulline can be decreased when combined with Ketoprofen.

Check this interaction

Minocycline

Unknown severity

DB01017

The excretion of Citrulline can be decreased when combined with Minocycline.

Check this interaction

Probenecid

Unknown severity

DB01032

The excretion of Citrulline can be decreased when combined with Probenecid.

Check this interaction

Mercaptopurine

Unknown severity

DB01033

The excretion of Citrulline can be decreased when combined with Mercaptopurine.

Check this interaction

Ibuprofen

Unknown severity

DB01050

The excretion of Citrulline can be decreased when combined with Ibuprofen.

Check this interaction

Novobiocin

Unknown severity

DB01051

The excretion of Citrulline can be decreased when combined with Novobiocin.

Check this interaction

Benzylpenicillin

Unknown severity

DB01053

The excretion of Citrulline can be decreased when combined with Benzylpenicillin.

Check this interaction

Melatonin

Unknown severity

DB01065

The excretion of Citrulline can be decreased when combined with Melatonin.

Check this interaction

Ouabain

Unknown severity

DB01092

The excretion of Citrulline can be decreased when combined with Ouabain.

Check this interaction

Rosuvastatin

Unknown severity

DB01098

The excretion of Citrulline can be decreased when combined with Rosuvastatin.

Check this interaction

Cefadroxil

Unknown severity

DB01140

The excretion of Citrulline can be decreased when combined with Cefadroxil.

Check this interaction

Ceftriaxone

Unknown severity

DB01212

The excretion of Citrulline can be decreased when combined with Ceftriaxone.

Check this interaction

Cefamandole

Unknown severity

DB01326

The excretion of Citrulline can be decreased when combined with Cefamandole.

Check this interaction

Cefazolin

Unknown severity

DB01327

The excretion of Citrulline can be decreased when combined with Cefazolin.

Check this interaction

Showing 50 of 137 interactions

How it works

Mechanism of action

L-citrulline is converted to L-arginine by argininosuccinate synthase. L-arginine is in turn responsible for citrulline's therapeutic affects. Many of L-arginine's activities, including its possible anti-atherogenic actions, may be accounted for by its role as the precursor to nitric oxide or NO. NO is produced by all tissues of the body and plays very important roles in the cardiovascular system, immune system and nervous system. NO is formed from L-arginine via the enzyme nitric oxide synthase or synthetase (NOS), and the effects of NO are mainly mediated by 3',5' -cyclic guanylate or cyclic GMP. NO activates the enzyme guanylate cyclase, which catalyzes the synthesis of cyclic GMP from guanosine triphosphate or GTP. Cyclic GMP is converted to guanylic acid via the enzyme cyclic GMP phosphodiesterase. NOS is a heme-containing enzyme with some sequences similar to cytochrome P-450 reductase. Several isoforms of NOS exist, two of which are constitutive and one of which is inducible by immunological stimuli. The constitutive NOS found in the vascular endothelium is designated eNOS and that present in the brain, spinal cord and peripheral nervous system is designated nNOS. The form of NOS induced by immunological or inflammatory stimuli is known as iNOS. iNOS may be expressed constitutively in select tissues such as lung epithelium. All the nitric oxide synthases use NADPH (reduced nicotinamide adenine dinucleotide phosphate) and oxygen (O₂) as cosubstrates, as well as the cofactors FAD (flavin adenine dinucleotide), FMN (flavin mononucleotide), tetrahydrobiopterin and heme. Interestingly, ascorbic acid appears to enhance NOS activity by increasing intracellular tetrahydrobiopterin. eNOS and nNOS synthesize NO in response to an increased concentration of calcium ions or in some cases in response to calcium-independent stimuli, such as shear stress. In vitro studies of NOS indicate that the Km of the enzyme for L-arginine is in the micromolar range. The concentration of L-arginine in endothelial cells, as well as in other cells, and in plasma is in the millimolar range. What this means is that, under physiological conditions, NOS is saturated with its L-arginine substrate. In other words, L-arginine would not be expected to be rate-limiting for the enzyme, and it would not appear that supraphysiological levels of L-arginine which could occur with oral supplementation of the amino acid would make any difference with regard to NO production. The reaction would appear to have reached its maximum level. However, in vivo studies have demonstrated that, under certain conditions, e.g. hypercholesterolemia, L-arginine could enhance endothelial-dependent vasodilation and NO production.

Pharmacodynamics

A non-essential amino acid and a precursor of arginine. Citrulline supplements have been claimed to promote energy levels, stimulate the immune system and help detoxify ammonia (a cell toxin). L-citrulline is made from L-ornithine and carbamoyl phosphate in one of the central reactions in the urea cycle. It is also produced from L-arginine as a by-product of the reaction catalyzed by the enzyme NO synthase. L-citrulline, while being an amino acid, is not involved in protein synthesis and is not one of the amino acids coded for by DNA. Although citrulline cannot be incorporated in proteins during protein synthesis, several proteins are known to contain citrulline as an amino acid. These citrulline residues are generated by a family of enzymes called peptidylarginine deiminases (PADs), which convert the amino acid arginine into citrulline. Proteins that contain citrulline residues include myelin basic protein (MBP), fillagrin and several histone proteins.

Drug targets(12)

Proteins and enzymes this drug interacts with in the body

Nitric oxide synthase 3

BE0000263

NOS3

Specific functionactin monomer binding

Cellular location

Cell membrane

General function & pharmacology

Produces nitric oxide (NO) which is implicated in vascular smooth muscle relaxation through a cGMP-mediated signal transduction pathway .
PMID:1378832
NO mediates vascular endothelial growth factor (VEGF)-induced angiogenesis in coronary vessels and promotes blood clotting through the activation of platelets

Argininosuccinate synthase

BE0000671

ASS1

Specific functionamino acid binding

Cellular location

Cytoplasm, cytosol

General function & pharmacology

One of the enzymes of the urea cycle, the metabolic pathway transforming neurotoxic amonia produced by protein catabolism into inocuous urea in the liver of ureotelic animals. Catalyzes the formation of arginosuccinate from aspartate, citrulline and ATP and together with ASL it is responsible for the biosynthesis of arginine in most body tissues

Putative hydrolase DDAH2

BE0000608

DDAH2

Specific functionhydrolase activity

Cellular location

Cytoplasm

General function & pharmacology

Putative hydrolase with unknown substrate (Probable). Does not hydrolyze N(G),N(G)-dimethyl-L-arginine (ADMA) which acts as an inhibitor of NOS .
PMID:21493890 PMID:37296100
In endothelial cells, induces expression of vascular endothelial growth factor (VEGF) via phosphorylation of the transcription factor SP1 by PKA in a process that is independent of NO and NO synthase (By similarity). Similarly, enhances pancreatic insulin secretion through SP1-mediated transcriptional up-regulation of secretagogin/SCGN, an insulin vesicle docking protein (By similarity).

Upon viral infection, relocates to mitochondria where it promotes mitochondrial fission through activation of DNM1L leading to the inhibition of innate response activation mediated by MAVS PMID:33850055

N(G),N(G)-dimethylarginine dimethylaminohydrolase 1

BE0000766

DDAH1

Specific functionamino acid binding

General function & pharmacology

Hydrolyzes N(G),N(G)-dimethyl-L-arginine (ADMA) and N(G)-monomethyl-L-arginine (MMA) which act as inhibitors of NOS. Has therefore a role in the regulation of nitric oxide generation

Ornithine transcarbamylase, mitochondrial

BE0000306

OTC

Specific functionamino acid binding

Cellular location

Mitochondrion matrix

General function & pharmacology

Catalyzes the second step of the urea cycle, the condensation of carbamoyl phosphate with L-ornithine to form L-citrulline .
PMID:2556444 PMID:6372096 PMID:8112735

The urea cycle ensures the detoxification of ammonia by converting it to urea for excretion PMID:2556444

Transporters(1)

Proteins that transport this drug across cell membranes

Solute carrier family 22 member 6

BE0001066

SLC22A6

substrate

Specific functionalpha-ketoglutarate transmembrane transporter activity

Cellular location

Basolateral cell membrane

General function & pharmacology

Secondary active transporter that functions as a Na(+)-independent organic anion (OA)/dicarboxylate antiporter where the uptake of one molecule of OA into the cell is coupled with an efflux of one molecule of intracellular dicarboxylate such as 2-oxoglutarate or glutarate .
PMID:11669456 PMID:11907186 PMID:14675047 PMID:22108572 PMID:23832370 PMID:28534121 PMID:9950961

Mediates the uptake of OA across the basolateral side of proximal tubule epithelial cells, thereby contributing to the renal elimination of endogenous OA from the systemic circulation into the urine .
PMID:9887087
Functions as a biopterin transporters involved in the uptake and the secretion of coenzymes tetrahydrobiopterin (BH4), dihydrobiopterin (BH2) and sepiapterin to urine, thereby determining baseline levels of blood biopterins .
PMID:28534121
Transports prostaglandin E2 (PGE2) and prostaglandin F2-alpha (PGF2-alpha) and may contribute to their renal excretion .
PMID:11907186
Also mediates the uptake of cyclic nucleotides such as cAMP and cGMP .
PMID:26377792
Involved in the transport of neuroactive tryptophan metabolites kynurenate (KYNA) and xanthurenate (XA) and may contribute to their secretion from the brain .
PMID:22108572 PMID:23832370
May transport glutamate .
PMID:26377792
Also involved in the disposition of uremic toxins and potentially toxic xenobiotics by the renal organic anion secretory pathway, helping reduce their undesired toxicological effects on the body .
PMID:11669456 PMID:14675047
Uremic toxins include the indoxyl sulfate (IS), hippurate/N-benzoylglycine (HA), indole acetate (IA), 3-carboxy-4- methyl-5-propyl-2-furanpropionate (CMPF) and urate .
PMID:14675047 PMID:26377792
Xenobiotics include the mycotoxin ochratoxin (OTA) .
PMID:11669456
May also contribute to the transport of organic compounds in testes across the blood-testis-barrier PMID:35307651

Biological pathways(22)

Citrullinemia Type I

disease

Involved compounds

Oxogluric acid,Adenosine phosphate,ATP,Calcium,Pyrophosphoric acid,Alanine,Arginine,Aspartic acid,Citrulline,Glutamic acid,L-Glutamine,Ornithine,Maleic acid,NADH,Pyridoxal phosphate,Pyruvic acid,Urea

Carbamoyl Phosphate Synthetase Deficiency

disease

Involved compounds

Oxogluric acid,Adenosine phosphate,ATP,Calcium,Pyrophosphoric acid,Alanine,Arginine,Aspartic acid,Citrulline,Glutamic acid,L-Glutamine,Ornithine,Maleic acid,NADH,Pyridoxal phosphate,Pyruvic acid,Urea

Argininosuccinic Aciduria

disease

Involved compounds

Oxogluric acid,Adenosine phosphate,ATP,Calcium,Pyrophosphoric acid,Alanine,Arginine,Aspartic acid,Citrulline,Glutamic acid,L-Glutamine,Ornithine,Maleic acid,NADH,Pyridoxal phosphate,Pyruvic acid,Urea

Urea Cycle

metabolic

Involved compounds

Oxogluric acid,Adenosine phosphate,ATP,Calcium,Pyrophosphoric acid,Alanine,Arginine,Aspartic acid,Citrulline,Glutamic acid,L-Glutamine,Ornithine,Maleic acid,NADH,Pyridoxal phosphate,Pyruvic acid,Urea

Ornithine Transcarbamylase Deficiency (OTC Deficiency)

disease

Involved compounds

Oxogluric acid,Adenosine phosphate,ATP,Calcium,Pyrophosphoric acid,Alanine,Arginine,Aspartic acid,Citrulline,Glutamic acid,L-Glutamine,Ornithine,Maleic acid,NADH,Pyridoxal phosphate,Pyruvic acid,Urea

Argininemia

disease

Involved compounds

Oxogluric acid,Adenosine phosphate,ATP,Calcium,Pyrophosphoric acid,Alanine,Arginine,Aspartic acid,Citrulline,Glutamic acid,L-Glutamine,Ornithine,Maleic acid,NADH,Pyridoxal phosphate,Pyruvic acid,Urea

Nitric Oxide Signaling Pathway

signaling

Involved compounds

Calcium,Flavin adenine dinucleotide,Arginine,Citrulline,Mesoheme,Nitric Oxide,Flavin mononucleotide,Sapropterin

Affected organisms(1)

Humans and other mammals

Salt forms(1)

Citrulline malate(DBSALT003047)

Experimental properties(4)

Protein Data Bank entries(64)

Commercial products(2)

Chemical identifiers

CAS, UNII, InChI Key and database cross-references

Show

Linked compound data from DrugBank Open Data (CC BY-NC 4.0)

Citrulline

DB00155

CAS number

372-75-8

UNII (FDA)

29VT07BGDA

InChI Key (molecular fingerprint)

RHGKLRLOHDJJDR-BYPYZUCNSA-N

Additional database identifiers

ChEBI

16349

PubChem Compound

9750

PubChem Substance

46506583

KEGG Compound

C00327

KEGG Drug

D07706

ChemSpider

9367

BindingDB

92903

PharmGKB

PA164747225

PDB

CIR

IUPHAR

722

Guide to Pharmacology

722

Wikipedia

Citrulline

ChEMBL

CHEMBL444814

ZINC

ZINC000001532614

RxCUI

2567

HUGO Gene Nomenclature Committee (HGNC)

HGNC:7876

GenAtlas

NOS3

GeneCards

NOS3

GenBank Gene Database

M93718

GenBank Protein Database

189212

Guide to Pharmacology

1249

UniProtKB

P29474

UniProt Accession

NOS3_HUMAN

HUGO Gene Nomenclature Committee (HGNC)

HGNC:758

GenAtlas

ASS1

GeneCards

ASS1

GenBank Gene Database

X01630

GenBank Protein Database

28872

UniProtKB

P00966

UniProt Accession

ASSY_HUMAN

HUGO Gene Nomenclature Committee (HGNC)

HGNC:2716

GenAtlas

DDAH2

GeneCards

DDAH2

GenBank Gene Database

AF070667

GenBank Protein Database

4454710

UniProtKB

O95865

UniProt Accession

DDAH2_HUMAN

HUGO Gene Nomenclature Committee (HGNC)

HGNC:2715

GenAtlas

DDAH1

GeneCards

DDAH1

GenBank Gene Database

AB001915

GenBank Protein Database

4160666

Guide to Pharmacology

1247

UniProtKB

O94760

UniProt Accession

DDAH1_HUMAN

HUGO Gene Nomenclature Committee (HGNC)

HGNC:8512

GenAtlas

OTC

GeneCards

OTC

GenBank Gene Database

K02100

GenBank Protein Database

189407

UniProtKB

P00480

UniProt Accession

OTC_HUMAN

HUGO Gene Nomenclature Committee (HGNC)

HGNC:7872

GenAtlas

NOS1

GeneCards

NOS1

GenBank Gene Database

U17327

GenBank Protein Database

642526

Guide to Pharmacology

1251

UniProtKB

P29475

UniProt Accession

NOS1_HUMAN

HUGO Gene Nomenclature Committee (HGNC)

HGNC:7873

GenAtlas

NOS2A

GeneCards

NOS2

GenBank Gene Database

L09210

GenBank Protein Database

292242

Guide to Pharmacology

1250

UniProtKB

P35228

UniProt Accession

NOS2_HUMAN

HUGO Gene Nomenclature Committee (HGNC)

HGNC:18368

GenAtlas

PADI4

GeneCards

PADI4

GenBank Gene Database

AB017919

GenBank Protein Database

5913971

Guide to Pharmacology

2877

UniProtKB

Q9UM07

UniProt Accession

PADI4_HUMAN

HUGO Gene Nomenclature Committee (HGNC)

HGNC:20449

GenAtlas

PADI6

GeneCards

PADI6

GenBank Gene Database

AY422079

GenBank Protein Database

40068449

UniProtKB

Q6TGC4

UniProt Accession

PADI6_HUMAN

HUGO Gene Nomenclature Committee (HGNC)

HGNC:18367

GenAtlas

PADI1

GeneCards

PADI1

GenBank Gene Database

AB033768

GenBank Protein Database

6116899

Guide to Pharmacology

2894

UniProtKB

Q9ULC6

UniProt Accession

PADI1_HUMAN

HUGO Gene Nomenclature Committee (HGNC)

HGNC:18337

GenAtlas

PADI3

GeneCards

PADI3

GenBank Gene Database

AB026831

GenBank Protein Database

6172379

UniProtKB

Q9ULW8

UniProt Accession

PADI3_HUMAN

HUGO Gene Nomenclature Committee (HGNC)

HGNC:18341

GenAtlas

PADI2

GeneCards

PADI2

GenBank Gene Database

AB030176

GenBank Protein Database

5572747

UniProtKB

Q9Y2J8

UniProt Accession

PADI2_HUMAN

HUGO Gene Nomenclature Committee (HGNC)

HGNC:10970

GenAtlas

hROAT1

GeneCards

SLC22A6

GenBank Gene Database

AF057039

GenBank Protein Database

3831566

Guide to Pharmacology

1025

UniProtKB

Q4U2R8

UniProt Accession

S22A6_HUMAN

International reference pricing

1 formulations

Reference pricing from DrugBank. Prices are indicative and may not reflect current UK costs.

L-citrulline powder

$1.01/g

Source: DrugBank. Used under CC BY-NC 4.0 academic licence for non-commercial purposes.

DrugBank citations

If you use DrugBank data in your research, please cite the following publications:

Knox C., Wilson M., Klinger C.M., et al

DrugBank 6.

0: the DrugBank Knowledgebase for 2024

Nucleic Acids Res. 2024 Jan 552(D1):D1265-D1275

PMID: 37953279

Wishart D.S., Feunang Y.D., Guo A.C., et al

DrugBank 5.

0: a major update to the DrugBank database for 2018

Nucleic Acids Res. 2017 Nov 846(D1):D1074-D1082

PMID: 29126136

Show earlier publications

Law V., Knox C., Djoumbou Y., et al

DrugBank 4.

0: shedding new light on drug metabolism

Nucleic Acids Res. 2014 Jan 142(1):D1091-7

PMID: 24203711

Knox C., Law V., Jewison T., et al

DrugBank 3.

0: a comprehensive resource for 'omics' research on drugs

Nucleic Acids Res. 2011 Jan39(Database issue):D1035-41

PMID: 21059682

Wishart D.S., Knox C., Guo A.C., et al

DrugBank: a knowledgebase for drugs, drug actions and drug targets.

Nucleic Acids Research

2008 Jan36(Database issue):D901-6

PMID: 18048412

Wishart D.S., Knox C., Guo A.C., et al

DrugBank: a comprehensive resource for in silico drug discovery and exploration.

Nucleic Acids Research

2006 Jan 134(Database issue):D668-72

PMID: 16381955

Source: go.drugbank.comCC BY-NC 4.0

Updated 30 days ago(4 Mar 2026)

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Citrulline 500mg/5ml oral solution

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Citrulline

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Citrulline 500mg/5ml oral solution

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Citrulline

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