Cyffuriau A i Y
- Cyffuriau adfywiolDiffiniad
- CwcioDiffiniad
- Cyffur LabordyDiffiniad
- Cyffuriau DawnsioDiffiniad
- CutDiffiniad
- CrankDiffiniad
- CPNDiffiniad
- CosalgesicDiffiniad
- Co-proxamolDiffiniad
- ComaDiffiniad
- CaethiwedDiffiniad
- Cold turkeyDiffiniad
- CokeheadDiffiniad
- Co-dydramolDiffiniad
- CluckingDiffiniad
- ChillumDiffiniad
- CapsiwlDiffiniad
- CapsDiffiniad
- Cyffur rhithbair (hallucinogen)Diffiniad
- Cyllyll PoethDiffiniad
- CitDiffiniad
- ChwarterDiffiniad
- Cyfalaf AdferiadDiffiniad
- CynefinoDiffiniad
- Cyffur cynnal (maintenance)Diffiniad
- Cyffur taweluDiffiniad
- ChwistrellDiffiniad
- Cnap (Puck)Diffiniad
- Cynnyrch dros y cownterDiffiniad
- Cyffuriau narcotigDiffiniad
- CCocên
- CachCanabis
- CaffeinCaffein
- CanabisCanabis
- Captain CodyCodeine
- Carbon TetrachlorideToddyddion
- CardboardLSD
- CatKhat
- Catha EdulisKhat
- CathinoneCathinone
- CathinoneCathinone
- Cathinone (Aminopropiophenone)Khat
- Cemegolion YmchwilNew Psychoactive Substances
- Cerigos ("pebbles")Cocên
- CerrigCocên
- CetaminCetamin
- ChalkCrystal Meth
- CharlieCocên
- ChatKhat
- Chicken PowderPMA
- Chicken YellowPMA
- China whiteHeroin
- Chlordiazepoxide (Librium)Benzodiazepinau
- ChloroformToddyddion
- CiggiesNicotin
- CocoCaffein
- CocoaCaffein
- CocênCocên
- Cocên ( Powdr cocen)Cocên
- CodeineCodeine
- CodyCodeine
- CoffiCaffein
- ColaCaffein
- CracCocên
- CrankAmphetamines
- Creigiau ("rock")Cocên
- CrystalCrystal Meth
- Crystal MethCrystal Meth
- Crystal methCrystal Meth
- CwrwAlcohol
- CyclizineCyclizine
- Cyclizine HydrochlorideCyclizine
- Cyclizine LactateCyclizine
- CyclotexaneToddyddion
- Cyffuriau CynllunwyrNew Psychoactive Substances
- CywarchCanabis
- Côc (Coc)Cocên