- X-Prep
- X-Seb T Plus
- X-Viate
- Xadago
- Xalatan
- Xaliproden
- Xalix
- Xalkori
- Xalkori oral
- Xaluprine
- Xanax
- Xanax Oral
- Xanax XR
- Xanax XR Oral
- XaQuil XR
- Xarelto
- Xartemis XR
- Xatmep
- Xatral
- Xclair topical
- Xelitral
- Xeljanz
- Xeljanz oral
- Xeljanz XR
- Xeloda
- Xelpros
- Xenaderm
- Xenaflamm
- Xenazine
- Xenical
- Xenon (133Xe) gas
- Xenon Xe 133 Gas
- Xenysalate
- Xeomin
- Xepi Cream
- Xerava
- Xerese
- Xermelo
- Xgeva
- Xhance
- Xiaflex
- Xibrom
- Xifaxan
- Xigduo XR
- Xigris
- Xiidra
- Xilapak
- Ximino
- Ximino Capsules
- Xiral
- Xiratuss oral
- XLys- XTrp Analog oral
- XLYS-TRY Maxamaid oral
- Xodol
- Xofigo
- Xolair
- Xolegel
- Xolegel Duo topical
- Xolido
- Xopenex
- Xopenex HFA
- Xopenex Inhalation Solution Concentrate
- Xopenex Pediatric
- Xryliderm
- Xrylix
- Xtampza ER
- Xtandi
- Xtoro
- Xtramins
- Xulane
- Xulane transdermal
- Xultophy
- Xultophy 100 / 3.6
- Xultophy Injection
- Xuriden
- Xydra EF oral
- Xylitol Oral Solution
- Xylocaine
- Xylocaine (Lidocaine Liquid and Solution)
- Xylocaine and Epinephrine
- Xylocaine Dental
- Xylocaine IM For Cardiac intramuscular
- Xylocaine MPF With Epinephrine
- Xylocaine Topical
- Xylocaine Topical Solution
- Xylocaine Viscous
- Xylocaine With Epinephrine
- Xylocaine-MPF
- Xylocard
- Xylon
- Xylon 10
- Xyntha
- Xyntha recombinant
- Xyrem
- Xyzal
- Xyzal (Levocetirizine Tablets)