DRUGGLE

by Mike Selinker

Solution: TRICYCLE

Each Druggle grid is played like Boggle with proper drug names, with each letter usable only once in each clue answer. Answers may have more than one placement, but always leave the same set of unused letters, which are shown here in lowercase.

EYPRm
ZTHAE
NILRX
DEMOA
oXANd

ENZYTE
THALOMID
XANAX
ZITHROMAX
ZYPREXA

iMfEN
UETOV
yRTHR
OINIA
COCED

CENTRUM
DARVON
NICORETTE
ORTHO EVRA
RHINOCORT

tRwLE
OEANI
CXITB
EZRMH
oDAOv

AMBIEN
DEXATRIM
DRIXORAL
EXCEDRIN
THORAZINE

PRBRI
VNOCT
AoTOY
wSINX
CeOEl

BOTOX
NASONEX
NORVASC
OXYCONTIN
PROCRIT

AIDsC
MPCAE
AEPSZ
TIROR
oCLfP

CIPRO
DIMETAPP
PEPCID AC
PRILOSEC
PROPECIA
PROZAC

iYQUD
TNIAM
AEDLG
TIMOn
vSNER

DEMEROL
IMODIUM AD
MONISTAT
MIDOL
NYQUIL
ROGAINE

eYTOn
VAGRt
LIINA
UCSDE
MoOMR

CIALIS
NICODERM
VAGISIL
VALIUM
VIAGRA
VICODIN
VYTORIN

FFUBL
ERINA
ITSMI
RAOrS
oCLIN

BUFFERIN
CLARITIN
LAMISIL AT
MOTRIN
RETIN-A
RITALIN
UNISOM

LCUMf
NIAOR
CTFLC
EANOb
MSAZo

ANACIN
CONTAC
FLONASE
METAMUCIL
ZANTAC
ZOCOR
ZOLOFT

oUIND
MXETS
AARBI
OLEVA
bXECT

ALEVE
CELEBREX
EXLAX
LEVITRA
MAALOX
NEXIUM
TAVIST D

iNEDO
EXAVC
XPILR
eOIPE
RfTSl

ADVIL
CRESTOR
LIPITOR
PAXIL
PERCODAN
PLAVIX
SILVADENE
VIOXX

UORIa
NPEON
SBLYT
OEAsR
LNTDk

BAYER
BENADRYL
NEOSPORIN
NORPLANT
NUPRIN
NYTOL
TYLENOL

Reading the unused letters grid by grid spells:
MODIFY TWO VOWELS OF INVENTOR OF BOOBIE FLASK.

On g4tv.com (mentioned in the header), the show "Invent This!" has a story about the Boobie Flask, a method of smuggling alcohol in one's brassiere. The inventor's name is TRACY COE, and modifying two vowels in her name makes the answer TRICYCLE.