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Drug Portal Generic Name Stem showing Activity


The Drug names used in the NLM Drug portal are structured by committees to reflect the type of condition that the drug is used for. This is true of most official generic names such as those we label as [USAN] for United States Adopted Name. The table below show shows the various name stems used in this effort.

The table has columns for the Generic Name Stem, a Stem Definition, and an Example. The Name Stem has hyphens at either or both ends of its text to show that it is found at the beginning, end, or in the middle of a generic name.

For example, the Stem “-azepam” would be found at the end of a generic name, corresponds to the definition “Antianxiety agents (diazepam type)”, and Lorazepam as an example drug.

The stems calci- or -calci- are found at the beginning or middle of “Vitamin D analogues” such as calcipotriene and tacalcitol.

Generic Name Stem Stem Definition Examples
-abine (see -arabine, -citabine) decitabine
-ac Anti-inflammatory agents (acetic acid derivatives) bromfenac;  dexpemedolac
-acetam See -racetam
-actide Synthetic corticotropins seractide
-adol or -aldol- Analgesics (mixed opiate receptor agonists/ antagonists) tazadolene; spiradolene; levonantradol
-adox Antibacterials (quinoline dioxide derivatives) carbadox
-afenone Antiarrhythmics (propafenone derivatives) alprafenone; diprafenone
-afil PDE5 inhibitors tadalafil
-aj- Antiarrhythmics (ajmaline derivatives) lorajmine
-aldrate Antacid aluminum salts magaldrate
-algron Alpha1 - and alpha2 - adrenoreceptor agonists dabuzalgron
-alol Combined alpha and beta blockers labetalol; medroxalol
-amivir (see -vir)
-ampa Ionotropic non-NMDA glutamate receptors (AMPA and/or KA receptors)
     -ampanel Ionotropic non-NMDA glutamate receptors (AMPA and/or KA receptors) ; antagonists becampanel
     -ampator Ionotropic non-NMDA glutamate receptors (AMPA and/or KA receptors) ; modulators forampator
-andr- Androgens nandrolone
-anib Angiogenesis inhibitors semaxanib
-anserin Serotonin 5-HT2 receptor antagonists  altanserin; tropanserin; adatanserin
-antel Anthelmintics (undefined group)  carbantel
-antrone Antineoplastics; anthraquinone derivatives pixantrone
-apsel P-selectin antagonists torapsel
-arabine Antineoplastics (arabinofuranosyl derivatives) fazarabine; fludarabine 
aril-, -aril, -aril-  Antiviral (arildone derivatives) pleconaril; arildone; fosarilate
-arit Antirheumatics (lobenzarit type) lobenzarit; clobuzarit
-arol Anticoagulants (dicumarol type) dicumarol
-arone Antiarrhythmics amiodarone; dronedarone
-arot- Arotinoids etarotene; sumarotene; tazarotene
-arotene Arotinoid derivatives bexarotene; linarotene; tazarotene
arte- Antimalarials (artemisin derivatives) arteflene
-ase Enzymes alglucerase; dornase alfa
   subgroups:
     -dismase Enzymes ; superoxide dismutase activity  (exception: orgotein) sudismase
     -teplase Enzymes ; tissue-type plasminogen activators alteplase; duteplase; silteplase
     -uplase Enzymes ; urokinase-type plasminogen activators saruplase; nasaruplase; 
-ast Antiasthmatics/antiallergics (not acting primarily as antihistamines; leukotriene biosynthesis inhibitors)
   subgroups:
     -lukast Antiasthmatics/antiallergics ; leukotriene receptor antagonists cinalukast; pobilukast
     -milast Antiasthmatics/antiallergics  ; type IV phosphodiesterase inhibitors piclamilast
     -trodast Antiasthmatics/antiallergics  ; thromboxane A2 receptor antagonists seratrodast
     -zolast Antiasthmatics/antiallergics ; benzoxazole derivatives eclazolast; ontazolast
     -tegr- Antiasthmatics/antiallergics ; integrin antagonists valategrast
-(a)tadine Tricyclic histaminic-H1 receptor antagonists,  loratadine derivatives desloratadine; rupatadine; somantadine
-astine Antihistaminics (histamine-H1 receptor antagonists) ebastine
-atadine Tricyclic antiasthmatics olopatadine; loratadine
-axine Antianxiety, antidepressant inhibitor of norepinephrine and dopamine re-uptake
      -(f)axine radafaxine
-azenil Benzodiazepine receptor agonists/antagonists bretazenil; flumazenil; 
-azepam Antianxiety agents (diazepam type) lorazepam
-azepide Cholecystokinin receptor antagonists devazepide
-azocine Narcotic antagonists/agonists (6,7-benzomorphan derivatives) quadazocine; ketazocine; 
-azoline Antihistamines/local vasoconstrictors (antazoline type) antazoline
-azosin Antihypertensives (prazosin type) doxazosin
-bactam Beta-lactamase inhibitors sulbactam
-bamate Tranquilizers/antiepileptics (propanediol and pentanediol groups) meprobamate; felbamate; 
-barb or -barb Barbituric acid derivatives  phenobarbital; secobarbital; eterobarb
-begron Beta 3 adrenoreceptor agonist talibegron
-bendazole Anthelmintics (tibendazole type) cambendazole
-berel Beta estrogen receptor agonist prinaberel
-bersat Anticonvulsants; antimigraine (benzoylamino-benzpyran derivatives) carabersat; tidembersat; 
bol- or -bol- Anabolic steroids bolandiol; mibolerone; 
-bufen Non-steroidal anti-inflammatory agents, fenbufen derivatives indobufen 
-bulin Antineoplastics (mitotic inhibitors; tubulin binders)  mivobulin
-butan Antiseptics (dapabutan type) dapabutan; lopobutan; 
-butazone Anti-inflammatory analgesics (phenylbutazone type) mofebutazone
-caine Local anesthetics dibucaine
calci- or -calci- Vitamin D analogues calcipotriene; tacalcitol; 
-camra Antivirals (intracellular adhesion molecules,  icam-1 derivatives) tremacamra
-camsule Camphorsulfonic acid derivatives used as UVA  sunscreens ecamsule
-casan Caspase (interleukin –1b) converting enzyme inhibitors pralnacasan
-caserin Serotonin receptor agonists, primarily 5-HT2 lorcaserin; vabicaserin; 
-castat (see -stat)
-carbef Antibiotics (carbacephem derivatives) loracarbef
-catib Cathespin inhibitors balicatib
-cavir (see -vir)
cef-  Cephalosporins cefazolin
-cept Receptor molecules, native or modified ( a preceding infix should designate the target) alvircept
   subgroups:
 -co- Receptor molecules, native or modified ;complement receptors mirococept
 -facept Receptor molecules, native or modified ;lymphocyte function-associated with antigen 3 (LFA) receptor alefacept
  -farcept Receptor molecules, native or modified ; interferon receptors pifarcept
  -lefacept Receptor molecules, native or modified ; lymphocyte function-associated antigen 3 alefacept
   
  -nercept Receptor molecules, native or modified ; tumor necrosis factor receptors lenercept
  -vircept Receptor molecules, native or modified ; antiviral receptors alvircept
-cet Receptors (small molecule)
subgroup:
   -calcet Receptors (small molecule) ; calcium tecalcet
-cetrapib Cholesterol ester transfer protein inhibitors torcetrapib
-cic Hepatoprotectives (timonacic type) limazocic
-ciclib Cyclin dependent kinase inhibitors seliciclib
-ciclovir (see vir-)
-cidib Cyclin dependent kinase inhibitor alvocidib
-cidin Natural antibiotics (undefined group) gramicidin
-ciguat Guanaline cyclase activator ataciguat; atriciguat
-cillin Penicillins ampicillin
-citabine Nucleoside antiviral or antineoplastic agents, cytarabine or azarabine derivatives gemcitabine; fiacitabine; zalcitabine
-clidine Muscarinic agonists (various indications) vedaclidine; talsaclidine; 
-clone Hypnotics/tranquilizers (zopiclone type) pagoclone
-cog Blood coagulation factors
   subgroups:
   -eptacog Blood coagulation factors ; blood coagulation factor VII eptacog alfa (activated)
   -nonacog Blood coagulation factors ; blood coagulation factor IX nonacog alfa
   -octocog Blood coagulation factors ; blood coagulation factor VIII moroctocog alfa; octocog alfa
-cogin Blood coagulation cascade inhibitor tifacogin
-conazole Systemic antifungals (miconazole type) fluconazole; oxiconazole; 
-cort- Cortisone derivatives hydrocortisone
-coxib Cyclooxygenase-2 inhibitors celecoxib; parecoxib; valdecoxib
-cridar (see -dar)
‑crinat Diuretics (ethacrynic acid derivatives) brocrinat
-crine Acridine derivatives amsacrine; quinacrine
‑cromil Antiallergics (cromoglicic acid derivatives) nedocromil
-curium (also -curonium) Neuromuscular blocking agents (quaternary ammonium compounds) atracurium; alcuronium; pipecuronium
‑cycline Antibiotics (tetracycline derivatives) minocycline
-dan Positive inotropic agents (pimobendan type) prinoxodan; indolidan
-dapsone Antimycobacterials (diaminodiphenylsulfone derivatives) acedapsone
-dar Multidrug resistance inhibitors
   subgroups:
    -cridar Multidrug resistance inhibitors ;acridine carboxamide derivatives elacridar
    -icodar Multidrug resistance inhibitors ;pipecolic acid derivatives biricodar
    -quidar Multidrug resistance inhibitors ; quinoline derivatives lamiquidar; zozuquidar; 
    -spodar Multidrug resistance inhibitors ; ciclosporin D derivatives valspodar
-denoson Adenosine A receptor agonists tecadenoson,; binodenoson; 
-dermin (see -ermin)
dil-, -dil‑ or ‑dil Vasodilators (undefined group) fostedil
‑dipine Phenylpyridine vasodilators (nifedipine type) darodipine; felodipine; 
-dismase (see -ase)
-distim (see -stim)
-ditan Antimigraine (5-HT1 receptor agonists) alniditan
-dopa Dopamine receptor agonists levodopa
-dore Dopamine D2D3 receptor modulators aplindore fumarate
-dotin Synthetic analogs of the dolastatin series tasidotin HCl
-dralazine Antihypertensives (hydrazine‑phthalazines) hydralazine; endralazine; 
-dronate Calcium metabolism regulators etidronate; tiludronate; 
-dutant (see -tant)
-ectedin Ecteinascodin derivatives monectedin
-ectin Antiparasitics (ivermectin type) doramectin; moxidectin; 
-elestat (see -stat)
-elvakin (see -kin)
-emcinal Erythromycin derivatives lacking antibiotic activity mitemcinal
-entan Endothelin receptor antagonists bosentan
-eptacog (see -cog)
-eptakin (see -kin)
-erg- Ergot alkaloid derivatives pergolide
-eridine Analgesics (meperidine type) anileridine
-ermin Growth factors
   subgroups:
    -bermin Growth factors ; vascular endothelial growth factors telbermin
    -dermin               Growth factors ; epidermal growth factors murodermin
    -fermin                Growth factors ; fibroblast growth factors ersofermin
    -nermin               Growth factors ; tumor necrosis factors sonermin; tasonermin; 
    -plermin              Growth factors ; platelet derived growth factors becaplermin 
    -sermin Growth factors ; insulin-like growth factors mecasermin
    -termin Growth factors ;  transforming growth factors  cetermin
          -otermin    growth factors ; bone morphogenetic proteins dibotermin alfa
estr- or -estr- Estrogens estrone; fenestrel
-estrant Estrogen antagonists fulvestrant
-etanide Diuretics (piretanide type) bumetanide
-exakin (see -kin)
-ezolid Oxazolidinone antibacterials eperezolid; linezolid; 
-farnib Farnesyl transferase inhibitor tipifarnib
-fenamate "fenamic acid" ester or salt derivatives etofenamate
-fenamic acid Anti-inflammatory agents (anthranilic acid derivatives) flufenamic acid
-fenin Diagnostic aids ((phenylcarbamoyl)methyl iminodiacetic acid derivatives) arclofenin
-fenine Analgesics (fenamic acid subgroup) floctafenine
-fentanil Narcotic analgesics (fentanyl derivatives) alfentanil; mirfentanil; brifentanil
-fentrine Phosphodiesterase inhibitor pumafentrine
-fermin (see -ermin)
-fetamin(e) Amfetamine derivatives                                                    levmetamfetamine
-fiban Fibrinogen receptor antagonists  (glycoprotein IIb/IIIa receptor antagonists) lamifiban; tirofiban; 
-fibatide  (see -tide)
-fibrate Antihyperlipidemics (clofibrate type)  bezafibrate
-filcon Hydrophilic contact lens materials alphafilcon A; xylofilcon A; mipafilcon A
-fingol Sphingosine derivatives cedefingol; safingol
-flapon 5-lipoxygenase-activating protein (FLAP) inhibitors quiflapon
-flurane General inhalation anesthetics  (halogenated alkane derivatives) enflurane
-fo- Phosphoro-derivatives adefovir
-focon Hydrophobic contact lens materials trifocon A; pasifocon B; satafocon A
-formin Hypoglycemics (phenformin type) buformin
-fradil Calcium channel blockers acting as vasodilators mibefradil
-fulven Antineoplastic, acylfulven derivatives viridofulven
-fungin Antifungal antibiotics (undefined group) kalafungin
-fylline Theophylline derivatives enprofylline; bamifylline; cipamfylline
-gab- Gabamimetics fengabine
gado- Gadolinium derivatives (principally for diagnostic use) gadodiamide; gadoteridol; gadobenate
-gapil Neuronal apoptosis inhibitors; GAPDH omigapil
-ganan Antimicrobial, bactericidal permeability increasing polypeptide iseganan; pexiganan; 
-gatran Thrombin inhibitors (argatroban type) efegatran
-gest- Progestins megestrol
-giline MAO inhibitors, type B selegiline
-gillin Antibiotics (Aspergillus strains) mitogillin
gli- Antihyperglycemics gliflumide
-gliptin Antihyperglycemics ; dipeptidyl aminopeptidase-IV inhibitors vildagliptin
-glitazar Antihyperglycemics ; PPAR agonists (not thiazolidene derivatives) farglitizar
-glitazone Antihyperglycemics ; PPST agonists (thiazolidene derivatives) ciglitazone; rosiglitazone
-glumide CCK antagonists, antiulcer, anxiolytic agent amiglumide; itriglumide; 
-golix GnRH receptor antagonists (nonpeptide) rupugolix
-gosivir (see -vir)
-gramostim (see -stim)
-grastim (see -stim)
-grel- or -grel Platelet aggregation inhibitors (undefined group) itazigrel; dimetagrel; furegrelate
guan- Antihypertensives (guanidine derivatives) guanoctine
-ibat Ileal bile acid transport inhibitor barixibat
-icam Anti-inflammatory agents (isoxicam type) enolicam; tenoxicam; 
-icodar (see -dar)
-ifen(e) Antiestrogens of the clomifene and tamoxifen groups nitromifene; raloxifene; droloxifene
-ilide Class III antiarrhythmic agents ibutilide; risotilide; dofetilide
-imepodib Inosine monophosphate dehydrogenase inhibitors merimepodib
-imex Immunostimulants forfenimex; roquinimex; ubenimex
-imibe- Antihyperlipidaemics, acyl CoA: cholesterol acyltransferase (ACAT) inhibitors eldacimibe; avasimibe; pactimibe
-imod Immunomodulators ivarimod; pidotimod; 
subgroup:
-mapimod Immunomodulators ; mitogen-activated protein (MAP) kinase inhibitors dormapimod
-imus Immunosuppressives tacrolimus; napirimus; gusperimus; sirolimus
io- Iodine-containing contrast media iodamide
-irudin Anticoagulants (hirudin type) desirudin
-isant Histamine H3 receptor antagonists cipralisant
-isomide Antiarrhythmics (disopyramide derivatives) bidisomide
-ium (also -onium) Quaternary ammonium derivatives clidinium; disiquonium; polixetonium; 
-ixafor CXCR4 antagonists plerixifor
‑kacin Antibiotics obtained from Streptomyces kanamyceticus (related to kanamycin) amikacin
-kalant Potassium channel antagonists almokalant; terikalant
-kalim Potassium channel agonists cromakalim; aprikalim; 
-kalner Opener of large conductance calcium-activated (maxi-k) K+ channels flindokalner
-kef- Enkephalin agonists (various indications) metkephamide; casokefamide; 
-kin Interleukin type substances
   subgroups:
   -decakin Interleukin type substances ; interleukin-10 analogues and derivatives ilodecakin
   -dodekin Interleukin type substances ; interleukin-12 analogues and derivatives edodekin alfa
   -elvekin Interleukin type substances ; interleukin 11 analogues and derivatives oprelvekin
   -eptakin Interleukin type substances ; interleukin 7 analogues and derivatives
   -exakin Interleukin type substances ; interleukin 6 analogues and derivatives atexakin alfa
   -leukin Interleukin type substances ; interleukin 2 analogues and derivatives  teceleukin; aldesleukin
   -nakin Interleukin 1 analogues and derivatives
         subgroups:
       -onakin Interleukin 1 analogues and derivatives ; interleukin 1-a analogues and derivatives pitonakin
       -benakin Interleukin 1 analogues and derivatives ; iinterleukin 1-b analogues and derivatives mobenakin
    -nonakin Interleukin 1 analogues and derivatives ; iinterleukin 9 analogues and derivatives
    -octakin Interleukin 1 analogues and derivatives ; iinterleukin 8 analogues and derivatives emoctakin
    -penkin Interleukin 1 analogues and derivatives ; iinterleukin 5 analogues and derivatives
     -trakin Interleukin 1 analogues and derivatives ; iinterleukin 4 analogues and derivatives binetrakin
-kinra Interleukin receptor antagonists
   subgroups:
   -nakinra Interleukin receptor antagonists ; interleukin 1 (IL-1) receptor antagonists anakinra
-kiren Renin inhibitors ditekiren; terlakiren; zankiren
-lazad Lipid peroxidation inhibitors tirilazad
-leptin Leptin derivatives metreleptin
‑leukin (see -kin)
-lipim Lipoprotein lipase activators ibrolipim
-locib Antineoplastics that inhibit the formation of 5-LO, LTB4, LTC4, and thromboxane B2 (TxB2); and  Activate PPARg nuclear receptors etalocib
-lubant Leukotriene receptor antagonists (treatment of inflammatory skin disorders) ticolubant
-lukast (see -ast)
-lutamide Antiandrogens bicalutamide; flutamide; 
-lutril Neutral endopeptidase inhibitors possessing additional endothelin converting enzyme  inhibitory activity daglutril 
-mab Monoclonal antibodies imciromab; abciximab; capromab; dacliximab; detumomab; enlimomab
     -axo- Monoclonal antibodies ; rat-murine hybrid antibodies
     -les- Monoclonal antibodies ; infix for inflammatory/infectious lesions
     -toxa- Monoclonal antibodies ; toxin as a target urtoxazumab
-mantadine or -mantine Antivirals/antiparkinsonians (adamantane derivatives)  rimantadine; dopamantine
-mastat (see -stat)
-meline Cholinergic agonists (arecoline derivatives used in treatment of Alzheimer's disease) xanomeline
-melteon Selective melatonin receptor agonist ramelteon
-mer Polymers cadexomer; carbetimer
-mesine Sigma receptor ligands igmesine; panamesine
-mestane Antineoplastics (aromatase inhibitors) plomestane
-metacin Anti‑inflammatory agents (indomethacin type)  zidometacin
-micin Antibiotics (Micromonospora strains) maduramicin; gentamicin
-monam Monobactam antibiotics gloximonam; oximonam; tigemonam
-morelin (see -relin)
-moren Non-peptidic growth hormone secretagogues ibutamoren
-mostim  (see -stim)
-motine Antivirals (quinoline derivatives) famotine
-moxin Monoamine oxidase inhibitors (hydrazine derivatives) benmoxin; domoxin; 
-mulin Antibacterials, pleuromulin derivatives retapamulin
-multin Mucosal tolerance inductors ismomultin
-mustine Antineoplastics (chloroethylamine  derivatives)  carmustine
-mycin Antibiotics (Streptomyces strains) lincomycin
nab- or ‑nab‑ Cannabinol derivatives nabazenil; dronabinol
-nakalant Mixed sodium/potassium channel blockers vernakalant
-nakin  (see -kin)
nal- Narcotic agonists/antagonists (normorphine type)  nalmefene
-navir (see vir-)
-nercept