Prime
- S-2
- Sabal
- Sabal Fructus
- S-adenosylmethionine
- Saizen
- Salagen
- Salazopyrin
- salbutamol
- Salflex
- Salgesic
- salicylates
- Salivart
- saliva substitutes
- Salix
- salmeterol
- Salmonine
- Salofalk
- salsalate
- salsify
- Salsitab
- Salutensin
- Salutensin-Demi
- samarium sm 153 lexidronam
- sampson root
- Sandimmune
- Sandostatin
- Sani-Supp
- Sans-Acne
- Sansert
- Santa Maria
- saquinavir
- Sarafem
- sargramostim
- Saw Palmetto Berry
- Scabene
- scopolamine
- Scot-Tussin
- Scot-Tussin Allergy DM
- Scot-tussin Expectorant
- SD-Deprenyl
- secobarbital
- Seconal
- Sectral
- Sedapap
- Sedapap-10
- Sedatuss
- selegiline
- Selestoject
- Semprex-D
- Sena-Gen
- Senexon
- sennosides
- Senokot
- Senokot-S
- SenokotXTRA
- Sensorcaine
- Septra
- Ser-Ap-Es
- Serax
- Serenoa repens
- Serentil
- Serevent
- Serophene
- Seroquel
- Serostim
- Sertan
- sertraline
- Serutan
- Serzone
- Seudotabs
- sevelamer
- Shogan
- Shohl's Solution modified
- short-acting corticosteroids
- Shovite
- Siblin
- sibutramine
- Silace
- Siladril
- Silafed Syrup
- Silaminic Cold Syrup
- Silapap
- sildenafil
- Sildimac
- Silphen
- Siltussin
- Silvadene
- silver sulfadiazine
- Silymarin
- simethicone
- Simron
- Simulect
- simvastatin
- Sinarest
- Sine-Aid
- Sinemet
- Sinequan
- Singulair
- Sinumist-SR Caplets
- Sinustop Pro
- Sinutab
- sirolimus
- Skelaxin
- Skelid
- Sleep-Eze 3
- Sleepwell 2-night
- slippery root
- Slo-Mag
- Slo-Niacin
- Slo-Phyllin GG
- Sloprin
- Slo-Salt
- Slow FE
- Slow-Salt-K
- smellage
- Snooze Fast
- socotrine
- Soda Mint
- sodium bicarbonate
- sodium calcium edetate
- sodium chloride (iv/oral)
- sodium citrate and citric acid
- sodium ferric gluconate complex
- sodium fluoride (oral)
- sodium iodide
- sodium oxybate
- sodium phosphate
- sodium polystyrene sulfonate
- sodium salicylate
- Solage
- Solaraze
- Solarcaine Aloe Extra Burn Relief
- Solazine
- Solfoton
- Solganol
- Solu-Cortef
- Solu-Flur
- Solu-Medrol
- Solurex
- Soma
- Soma Compound
- somatrem
- somatropin
- Somavert
- Sominex
- Somnol
- Sonata
- Sorbitrate
- Soriatane
- Sotacor
- sotalol
- Span-FF
- sparfloxacin
- Spasmoban
- Spectazole
- spectinomycin
- Spec-T Lozenge
- Spectracef
- spironolactone
- Sporanox
- Sprintec
- SPS
- squawroot
- SSKI
- Stadol
- Stadol NS
- Stagesic
- Starlix
- Statex
- Staticin
- stavudine
- Stelazine
- Stemetic
- Stemetil
- Sterapred
- Stieva-A
- Stimate
- Stool Softener
- Stop
- Storzolamide
- Strattera
- Streptase
- streptokinase
- streptomycin
- streptozocin
- Striant
- Strifon Forte DSC
- stringy bark tree
- strong iodine solution
- strontium-89 chloride
- Sublimaze
- Suboxone
- Subutex
- succimer
- succinylcholine
- sucralfate
- Sucrets
- Sudafed
- Sudafed 12 Hour
- Sudal
- Sudex
- Sular
- sulconazole
- Sulcrate
- sulfasalazine
- Sulfatrim
- Sulfatrim DS
- sulfinpyrazone
- sulfisoxazole
- Sulfizole
- sulindac
- Sultrin
- sumatriptan
- Sumycin
- Sunkist
- SuperChar Aqueous
- Supeudol
- Supprelin
- Surfak
- Survanta
- Sus-Phrine
- Sustaire
- Sustiva
- sweet cumin
- Syllact
- Symmetrel
- Symphitum officinale
- Symphitum radix
- Synacort
- Synagis
- Synalar
- Synamol
- Synarel
- Syn-Clonazepam
- Syn-Diltiazem
- Synemol
- Synercid
- Synflex
- Synflex DS
- Syn-Nadolol
- Syn-Pindolol
- Synthroid
- Syntocinon