| Levosalbutamol Predicted Metabolism Pathway |  | Metabolic | Mesoheme / Levosalbutamol |
| Lidocaine (Antiarrhythmic) Action Pathway |  | Drug Action | NADH / ATP / Lidocaine / Potassium cation / Calcium / Mesoheme / Formaldehyde |
| Lidocaine (Local Anaesthetic) Action Pathway |  | Drug Action | NADH / ATP / Lidocaine / Norepinephrine / Dopamine / Potassium cation / Calcium / Mesoheme / Formaldehyde |
| Lidocaine (Local Anaesthetic) Metabolism Pathway |  | Drug Metabolism | NADH / Lidocaine / Mesoheme / Formaldehyde |
| Lidocaine NMDA Anesthetic Action Pathway |  | Drug Action | Lidocaine / Potassium cation / Calcium |
| Lidocaine Sodium Channel Cardiac Muscle Relaxation Action Pathway |  | Drug Action | Lidocaine / Potassium cation / Calcium / Cyclic adenosine monophosphate |
| Light green SF yellowish Drug Metabolism |  | Metabolic | Light green SF yellowish |
| Lincomycin Action Pathway |  | Drug Action | Lincomycin |
| Lindane Drug Metabolism |  | Metabolic | Lindane |
| Linezolid Action Pathway |  | Drug Action | Linezolid |
| Linezolid Predicted Metabolism Pathway |  | Metabolic | Linezolid / Mesoheme |
| Liotrix Drug Metabolism |  | Metabolic | Liotrix |
| Lisdexamfetamine Dopamine Reuptake Inhibitor Action Pathway |  | Drug Action | Pyridoxal phosphate / Tyrosine / ATP / Dopamine / Levodopa / Lisdexamfetamine / Calcium / Magnesium cation / Iron / Cyclic adenosine monophosphate |
| Lisinopril ACE Inhibitor |  | Drug Action | Glutamic acid / Lisinopril / Zinc |
| Lisinopril Action Pathway |  | Drug Action | Lisinopril / Potassium cation / Zinc |
| Lisuride Dopamine Agonist Action Pathway |  | Drug Action | Pyridoxal phosphate / Tyrosine / Sapropterin / Lisuride / Dopamine / Levodopa / Calcium / Iron |
| Lisuride Drug Metabolism |  | Metabolic | Lisuride |
| Lithium carbonate Drug Metabolism |  | Metabolic | Lithium carbonate |
| Lithium citrate Drug Metabolism |  | Metabolic | Lithium citrate |
| Lofentanil Opioid Agonist Action Pathway |  | Drug Action | ATP / Calcium / Magnesium cation / Cyclic adenosine monophosphate / gamma-Aminobutyric acid / Pyrophosphoric acid / Sar9, Met (O2)11-Substance P / Lofentanil |
| Lofexidine Predicted Metabolism Pathway |  | Metabolic | Mesoheme / Lofexidine |
| Lomitapide Predicted Metabolism Pathway |  | Metabolic | Mesoheme / Lomitapide |
| Lomustine Action Pathway |  | Drug Action | Lomustine / Guanine |
| Long Chain Acyl-CoA Dehydrogenase Deficiency (LCAD) |  | Disease | Adenosine phosphate / NADH / ATP / Levocarnitine / Magnesium cation / Flavin adenine dinucleotide / Palmitic Acid / Pyrophosphoric acid |
| Long Chain Acyl-CoA Dehydrogenase Deficiency (LCAD) (Fatty Acid Metabolism) |  | Disease | Adenosine phosphate / NADH / ATP / Levocarnitine / Magnesium cation / Flavin adenine dinucleotide / Palmitic Acid / Pyrophosphoric acid |