- X-Hist
- X-Hist DM
- X-Seb
- X-Seb Plus
- X-Seb T Pearl
- X-Viate
- Xadago
- Xalatan
- Xaliproden
- Xalkori
- Xamoterol
- Xanax
- Xanax XR
- Xantinol Nicotinate
- Xaracoll
- Xarelto
- Xartemis XR
- Xatmep
- Xatral
- Xcopri
- Xebcort
- Xedec
- Xeglyze
- Xeljanz
- Xeloda
- Xelpros
- Xenaderm
- Xenazine
- Xenical
- Xenleta
- Xenon
- xenon (127Xe) gas
- xenon (133Xe) gas
- Xenysalate
- Xeomin
- Xepi
- Xerac AC
- Xerava
- Xerese
- Xermelo
- Xgeva
- Xhance
- Xiaflex
- Xibornol
- Xibrom
- Xifaxan
- Xigduo XR
- Xigris
- Xiidra
- Xilonix
- Ximelagatran
- Ximino
- Xipamide
- XiraHist
- XiraHist DM
- Xiral
- XiraTuss
- Xl-dol
- Xodol
- Xofigo
- Xofluza
- Xolair
- Xolegel
- Xolex
- Xolido
- Xolox
- Xopenex
- Xopenex HFA
- Xopenex HFA
- Xospata
- Xoten-C
- Xpect
- Xpect Hc
- Xpect-AT
- Xpect-PE
- Xpovio
- XS No Aspirin PR
- XS Pain Reliever
- Xtampza ER
- Xtandi
- Xtoro
- Xtra-Lax
- Xultophy
- Xuriden
- Xylishield
- Xylocaine
- Xylocaine with Epinephrine
- Xylocard
- Xylometazoline
- Xylometazoline, Combinations
- Xyntha
- Xyosted
- Xyralid
- Xyrem
- Xywav
- Xyzal