Acebutolol (S)
Acetylcarnitine (P)
N-Acetylcysteine (P)
N-Acetylneuraminic acid (P)
Acyclovir (P;U)
Acylcarnitines (P;U)
Allopurinol (P)
Amanitin (P)
Ambroxol (P)
Amiloride (P;U)
Amino acids (P)
Aminobutyric acid (S)
Amitriptylin and its N-oxide (P)
Amobarbital (P)
Amoxicillin (P)
Amphetamine (P)
Amphotericin B (R)
Ampicillin (P)
Anabolic steroids (B)
Antiasthmatic drugs (P;S)
Azelaic Acid (P)
Bacitracin (P)
Bendroflumethiazide (P)
Benzbromarone (P)
Benzodiazepines (various) (P;U)
Benzoic acid (S;P)
Benzyl alcohol (P)
Betahistine and 2-pyridylacetic acid (U;P)
Bezafibrate (P;U)
Budesonide (S;P)
Budipine and metabolites (P)
Busulfan (P)
Butizide (P)
Butorphanol and metabolites (P)
Caffeine (P)
Caffeinemetabolites (AFMU;17U;1X;1U)(U)
Canrenone (P)
Captopril (P)
Carbamazepine and carbamazepine-10;11-epoxide (P; W)
Carnitine (P; U; T)
Carrageen; Carvedilol (P)
Carvone (P; U)
Ceftizoxime (P; T)
Ceftriaxone (P; CSF)
Ceramides (P)
Cetylpyridiniumchloride (Saliva)
Chlormadinone acetate (P)
Chlorphentermine (P)
Chlortetracycline and 4-epi-chlortetracycline (F)
Chlorthalidone (B)
Ciclesonide and metabolite M1 (P; S; T)
Cimetidine (P) ;Cinnarizine (P)
Clarithromycin and 14-OH-clarithromycin (P; T)
Clavulanic acid (P)
Clenbuterol (U)
E- and Z-Clomiphene (P)
Clomipramine (P)
Clonidine (P)
Codeine (P)
Deanol (dimethylaminoethanol) (P; U)
Deoxycholate (R)
Desalkylflurazepam (P)
Desmosin (U)
Desmethylselegeline (P)
Dextromethorphan (P; U)
Dextrorphan and 3-hydroxymorphinan (P; U; CSF)
Diethylaminoethanol (P; U)
Diazepam (P)
Diclofenac (P; T; Syn; D)
Dihydralazine (P)
Dimetindene and metabolites (U)
Diphenhydramine (P)
Dipyridamole (P)
Doxorubicine (P)
Doxycycline (P)
Dronabinole (P)
Duramycin (P; U; T)
Enoxacin (P)
Erythromycin (P)
Escine (P)
Esomeprazole (P)
Estradiol (P)