- Syeda
- Sylatron
- Sylvant
- Symadine
- Symax
- Symbicort
- Symbyax
- Symdeko
- Symfi Lo
- Symjepi
- Symlin
- Symmetrel
- Sympazan
- Symproic
- SymTan
- SymTan A
- Symtuza
- Syn-Rx
- Syn-Rx DM
- Synagis
- Synalgos-DC
- Synapryn
- Synarel
- Syncol
- Syndros
- Synera
- Synjardy
- Synjardy XR
- Synotic
- Synovacin
- Synribo
- Synthroid
- Syntocinon
- Synvisc-One
- Syprine
- Syrosingopine And Diuretics
- Systane Nighttime
- Systane Overnight Therapy
- Sytobex