| Lo - Lz | Nummer |
| Lobelanidin | 14 |
| Lobelanin | |
| Lobelia inflata L. | |
| Lobelidion Hydrochlorid | |
| Lobelie | |
| Lobelin | 8 |
| α-Lobelin-hydrochlorid | |
| Lobelinsulfat | 14 / 8 |
| Lofentanil | 14 |
| Lofepramin | xxx |
| Loganin | 14 |
| Lolium temulentum | |
| Lonazolac | xxx |
| Lonicera caprifolium | 14 |
| Lonicera nigra | |
| Lonicera periclymenum | |
| Lonicera xylosteum | |
| Lophophora williamsii | |
| Lophotoxin | 16 |
| Loprazolam | 17 |
| Lorazepam | 17 / # (19b) |
| Lorbeerbaum | 18 |
| Lorcainid | xxx |
| Lormetazepam | 17 |
| Lost-Lewisit-Gemisch | xxx |
| Lösungsmittel-naphtha | 19a |
| Lovastatin | xxx |
| Löwenblatt | 16 |
| Löwenzahn | 16 / stark 18 |
| L S D | 14 / # 240 Info |
| Lufenuron | 16 / 18 |
| Luft | xxx |
| Luft, flüssige(O2) | 16 |
| β- / γ- Lumicolchicin | 14 / 3 |
| Luminol | 16 |
| Lungenreizstoffe | xxx |
| Lupenon | 16 |
| α- / β- Lupeol | 14 |
| Lupeolacetat | |
| Lupine, Vielblättrige | |
| Lupinidin | |
| Lupinin | |
| Lupinin-hydrochlorid | |
| Lupinin-polyphyllus | |
| Lutein | 18 |
| 2,4-Lutidin | 14 / 19 |
| Lutidinsäure | 16 |
| Lycium barbarum | 14 |
| Lycopen | 18 |
| Lycopersicin | 14 |
| Lycopin | 18 |
| Lycopodium clavatum | 14 |
| Lycoremin | 16 / 18 |
| Lycorin | 14 |
| Lyophyllum connatum | 16 |
| Lysergid | 14 / # 240 Info |
| Lysergsäure-di-ethylamid | |
| DL-Lysin | 18 |
| L-Lysin | |
| L-Lysin-hydrochlorid | |
| Lysozym | 16 |
| Lytta vesicatoria Fabricius | 14 |