Levonorgestrel (125 mg)

Levorphanol Tartrate CII (500 mg)

Levothyroxine (500 mg)

Levothyroxine Sodium (50 mg)

Levothyroxine for Peak Identification (15 mg) (levothyroxine sodium spiked with liothyronine, triiodothyroacetic acid, tetraiodothyroacetic acid)

Lidocaine (250 mg)

Lidocaine Hydrochloride (150 mg)

Lidocaine Related Compound H (50 mg) (2-Chloro-N-(2,6-dimethylphenyl)acetamide)

Lincomycin Hydrochloride (200 mg)

Lindane (200 mg)