Generic Drug Names with Tall Man Letters from FDA and ISMP


December 2010 - Vol. 7 No. 12

Table 1. FDA-Approved List of Generic Drug Names with Tall Man Letters

Drug Name with Tall Man Letters Confused with
acetaZOLAMIDE acetoHEXAMIDE
acetoHEXAMIDE acetaZOLAMIDE
buPROPion busPIRone
busPIRone buPROPion
chlorproMAZINE chlorproPAMIDE
chlorproPAMIDE chlorproMAZINE
clomiPHENE clomiPRAMINE
clomiPRAMINE clomiPHENE
cycloSERINE cycloSPORINE
cycloSPORINE cycloSERINE
DAUNOrubicin DOXOrubicin
dimenhyDRINATE diphenhydrAMINE
diphenhydrAMINE dimenhyDRINATE
DOBUTamine DOPamine
DOPamine DOBUTamine
DOXOrubicin DAUNOrubicin
glipiZIDE glyBURIDE
glyBURIDE glipiZIDE
hydrALAZINE hydrOXYzine
hydrOXYzine hydrALAZINE
medroxyPROGESTERone methylPREDNISolone
methylTESTOSTERone
methylPREDNISolone medroxyPROGESTERone
methylTESTOSTERone
methylTESTOSTERone medroxyPROGESTERone
methylPREDNISolone
niCARdipine NIFEdipine
NIFEdipine niCARdipine
prednisoLONE predniSONE
predniSONE prednisoLONE
sulfADIAZINE sulfiSOXAZOLE
sulfiSOXAZOLE sulfADIAZINE
TOLAZamide TOLBUTamide
TOLBUTamide TOLAZamide
vinBLAStine vinCRIStine
vinCRIStine vinBLAStine

 

Table 2. ISMP List of Additional Drug Name Pairs with Tall Man Letters

Drug Name with Tall Man Letters Confused with
ALPRAZolam LORazepam
aMILoride amLODIPine
amLODIPine aMILoride
ARIPiprazole RABEprazole
AVINza* INVanz*
azaCITIDine azaTHIOprine
azaTHIOprine azaCITIDine
carBAMazepine OXcarbazepine
CARBOplatin CISplatin
ceFAZolin cefoTEtan
cefOXitin
cefTAZidime
cefTRIAXone
cefoTEtan ceFAZolin
cefOXitin
cefTAZidime
cefTRIAXone
cefOXitin ceFAZolin
cefoTEtan
cefTAZidimecefTRI
AX
one
cefTAZidime ceFAZolin
cefoTEtan
cefOXitin
cefTRIAXone
cefTRIAXone ceFAZolin
cefoTEtan
cefOXitin
cefTAZidime
CeleBREX* CeleXA*
CeleXA* CeleBREX*
chlordiazePOXIDE chlorproMAZINE
chlorproMAZINE chlordiazePOXIDE
CISplatin CARBOplatin
clonazePAM cloNIDine
cloZAPine
LORazepam
cloNIDine clonazePAM
cloZAPine
KlonoPIN*
cloZAPine clonazePAM
cloNIDine
DACTINomycin DAPTOmycin
DAPTOmycin DACTINomycin
DOCEtaxel PACLitaxel
DOXOrubicin IDArubicin
DULoxetine FLUoxetine
ePHEDrine EPINEPHrine
EPINEPHrine ePHEDrine
fentaNYL SUFentanil
flavoxATE fluvoxaMINE
FLUoxetine DULoxetine
PARoxetine
fluPHENAZine fluvoxaMINE
fluvoxaMINE fluPHENAZine
flavoxATE
guaiFENesin guanFACINE
guanFACINE guaiFENesin
HumaLOG* HumuLIN*
HumuLIN* HumaLOG*
HYDROcodone oxyCODONE
HYDROmorphone morphine
IDArubicin DOXOrubicin
inFLIXimab riTUXimab
INVanz* AVINza*
ISOtretinoin tretinoin
KlonoPIN* cloNIDine
LaMICtal* LamISIL*
LamISIL* LaMICtal*
lamiVUDine lamoTRIgine
lamoTRIgine lamiVUDine
levETIRAcetam levOCARNitine
levOCARNitine levETIRAcetam
LORazepam ALPRAZolam
clonazePAM
metFORMIN metroNIDAZOLE
metroNIDAZOLE metFORMIN
NexAVAR* NexIUM*
NexIUM* NexAVAR*
niCARdipine niMODipine
NIFEdipine
NIFEdipine niMODipine
niCARdipine
niMODipine NIFEdipine
niCARdipine
NovoLIN* NovoLOG*
NovoLOG* NovoLIN*
OLANZapine QUEtiapine
OXcarbazepine carBAMazepine
oxyCODONE HYDROcodone
OxyCONTIN*
OxyCONTIN* oxyCODONE
PACLitaxel DOCEtaxel
PARoxetine FLUoxetine
PEMEtrexed PRALAtrexate
PENTobarbital PHENobarbital
PHENobarbital PENTobarbital
PRALAtrexate PEMEtrexed
PriLOSEC* PROzac*
PROzac* PriLOSEC*
QUEtiapine OLANZapine
quiNIDine quiNINE
quiNINE quiNIDine
RABEprazole ARIPiprazole
RisperDAL* rOPINIRole
risperiDONE rOPINIRole
riTUXimab inFLIXimab
romiDEPsin romiPLOStim
romiPLOStim romiDEPsin
rOPINIRole RisperDAL*
risperiDONE
SandIMMUNE* SandoSTATIN*
SandoSTATIN* SandIMMUNE*
SEROquel* SINEquan*
SINEquan* SEROquel*
sitaGLIPtin SUMAtriptan
Solu-CORTEF* Solu-MEDROL*
Solu-MEDROL* Solu-CORTEF*
SORAfenib SUNItnib
SUFentanil fentaNYL
sulfADIAZINE sulfaSALAzine
sulfaSALAzine sulfADIAZINE
SUMAtriptan sitaGLIPtin
ZOLMitriptan
SUNItnib SORAfenib
TEGretol* TRENtal*
tiaGABine tiZANidine
tiZANidine tiaGABine
traMADol traZODone
traZODone traMADol
TRENtal* TEGretol*
valACYclovir valGANciclovir
valGANciclovir valACYclovir
ZOLMitriptan SUMAtriptan
ZyPREXA* ZyrTEC*
ZyrTEC* ZyPREXA*

Highlighted are the new additions as of November 18, 2010.

* Brand names always start with an uppercase letter. Some brand names incorporate TALL MAN letters in initial characters and may not be readily recognized as brand names. An asterisk follows all brand names in Table 2.

© ISMP. ISMP Updates its List of Drug Name Pairs with TALL Man Letters. ISMP Medication Safety Alert! Nov 18, 2010;1.

Report actual and potential medication errors to the Medication Errors Reporting Program (MERP) via the Web at www.ismp.org or by calling 1-800-FAIL-SAF(E).

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