| Abortifacient, Progesterone Receptor Antagonist-Type | OLI_THERCLASS_APRAT | 1 |
| Absorbable Sulfonamides | OLI_THERCLASS_AS | 2 |
| Acid and Alkalai Poison Antidotes | OLI_THERCLASS_AAPA | 3 |
| Acne Agents, Topical | OLI_THERCLASS_AAT | 4 |
| Adrenal Steroid Inhibitors | OLI_THERCLASS_ASI | 5 |
| Adrenergic Agents, Catecholamines | OLI_THERCLASS_AAC | 6 |
| Adrenergics, Aromatic, Non-Catecholamine | OLI_THERCLASS_AANC | 7 |
| Alkylating Agents | OLI_THERCLASS_AA | 8 |
| Alpha/Beta-Adrenergic Blocking Agents | OLI_THERCLASS_ABABA | 12 |
| Alpha-2 Receptor Antagonist Antidepressants | OLI_THERCLASS_A2RAA | 9 |
| Alpha-Adrenergic Blocking Agent/Thiazide Combo | OLI_THERCLASS_AABATC | 10 |
| Alpha-Adrenergic Blocking Agents | OLI_THERCLASS_AABA | 11 |
| Amebacides | OLI_THERCLASS_AMEBAX | 13 |
| Aminoglycosides | OLI_THERCLASS_AGS | 14 |
| Ammonia Inhibitors | OLI_THERCLASS_AI | 15 |
| Amyotrophic Lateral Sclerosis Agents | OLI_THERCLASS_ALSA | 16 |
| Analgesic/Antipyretics, Non-Salicylate | OLI_THERCLASS_AANS | 17 |
| Analgesics, Narcotics | OLI_THERCLASS_AN | 18 |
| Analgesics, Salicylates | OLI_THERCLASS_AS_SAL | 19 |
| Anaphylaxis Therapy Agents | OLI_THERCLASS_ATA | 20 |
| Androgenic Agents | OLI_THERCLASS_AGA | 21 |
| Anorexic Agents | OLI_THERCLASS_AXA | 22 |
| Antacids | OLI_THERCLASS_ANTA | 23 |
| Anthelmintics | OLI_THERCLASS_ATM | 24 |
| Anti-Alcoholic Preparations | OLI_THERCLASS_AAP | 26 |
| Antiandrogenic Agents | OLI_THERCLASS_AAA | 39 |
| Anti-Anxiety Drugs | OLI_THERCLASS_AAD | 27 |
| Antiarrhythmics | OLI_THERCLASS_AARR | 40 |
| Anti-Arthritic, Folate Antagonist Agents | OLI_THERCLASS_AAFAA | 28 |
| Antibiotics | OLI_THERCLASS_ABIO | 41 |
| Anticholinergics, Quaternary Ammonium | OLI_THERCLASS_AQA | 42 |
| Anticholinergics/Antispasmodics | OLI_THERCLASS_ACAS | 43 |
| Anticonvulsants | OLI_THERCLASS_ACONV | 44 |
| Antidiarrheals | OLI_THERCLASS_ADRRH | 45 |
| Antidiuretic and Vasopressor Hormones | OLI_THERCLASS_AAVH | 46 |
| Antiemetic/Antivertigo Agents | OLI_THERCLASS_AEAVA | 47 |
| Antifibrinolytic Agents | OLI_THERCLASS_AFA | 48 |
| Antifungal Antibiotics | OLI_THERCLASS_AFAB | 49 |
| Antihistamines | OLI_THERCLASS_AHM | 50 |
| Anti-infectives, Miscellaneous | OLI_THERCLASS_AIMISC | 37 |
| Anti-Inflammatory, Pyrimid Synthesis Inhibitor | OLI_THERCLASS_AIPSI | 29 |
| Anti-inflammatory Tumor Necrosis Factor Inhibitor | OLI_THERCLASS_AITNFI | 38 |
| Antileprotics | OLI_THERCLASS_ALEP | 51 |
| Antimalarial Drugs | OLI_THERCLASS_AMALD | 52 |
| Anti-Mania Drugs | OLI_THERCLASS_AMD | 30 |
| Antimetabolites | OLI_THERCLASS_AMETB | 53 |
| Antimigraine Preparations | OLI_THERCLASS_AMIGR | 54 |
| Anti-Mycobacterium Agents | OLI_THERCLASS_AMBA | 31 |
| Anti-Narcolepsy/Anti-Hyperkinesis Agents | OLI_THERCLASS_ANAHA | 32 |
| Antineoplastics | OLI_THERCLASS_ANP | 56 |
| Antineoplastics, Miscellaneous | OLI_THERCLASS_ANPMISC | 57 |
| Antineoplastic Systemic En. | OLI_THERCLASS_ANPSE | 55 |
| Antioxidant Agents | OLI_THERCLASS_AOXA | 58 |
| Antiparkinsonism Drugs, Other | OLI_THERCLASS_APARK | 59 |
| Antiperspirants | OLI_THERCLASS_APERSP | 60 |
| Antiprotozoal Drugs, Miscellaneous | OLI_THERCLASS_APZDM | 61 |
| Antipruritics, Topical | OLI_THERCLASS_APRUT | 62 |
| Antipsoriatics Agents | OLI_THERCLASS_APSORA | 63 |
| Anti-Psychotics, Non-Phenothiazine | OLI_THERCLASS_APNP | 33 |
| Anti-Psychotics, Non-Phenothiazines | OLI_THERCLASS_APNP2 | 34 |
| Anti-Psychotics, Phenothiazines | OLI_THERCLASS_APP | 35 |
| Antiseborrheic Agents | OLI_THERCLASS_ASEBA | 64 |
| Antithyroid Preparation | OLI_THERCLASS_ATHYP | 65 |
| Antitubercular Antibiotics | OLI_THERCLASS_ATUBAB | 66 |
| Antitussives, Non-Narcotic | OLI_THERCLASS_ATUSNN | 67 |
| Anti-Ulcer Agents Preparations | OLI_THERCLASS_AUAP | 36 |
| Anti Ulcer - H. Pylori Agents | OLI_THERCLASS_AUHPA | 25 |
| Antivirals, General | OLI_THERCLASS_AVIRG | 68 |
| Antivirals, HIV-Specific | OLI_THERCLASS_AVIRHS | 69 |
| Antivirals, HIV-Specific, Protease Inhibitors | OLI_THERCLASS_AVIRHSPI | 70 |
| Artificial Tears | OLI_THERCLASS_AT | 71 |
| Barbiturates | OLI_THERCLASS_BARB | 72 |
| Belladonna Alkaloids | OLI_THERCLASS_BA | 73 |
| Benign Prostatic Hypertrophy/Micturition Agents | OLI_THERCLASS_BPHMA | 74 |
| Beta-Adrenergic Agents | OLI_THERCLASS_BAA | 75 |
| Beta-Adrenergic Blocking Agents | OLI_THERCLASS_BABA | 76 |
| Beta-Adrenergics and Glucocorticoids Combination | OLI_THERCLASS_BAAGC | 77 |
| Betalactams | OLI_THERCLASS_BL | 78 |
| Bile Salts | OLI_THERCLASS_BS | 80 |
| Bile Salt Sequestrants | OLI_THERCLASS_BSS | 79 |
| Bone Resorption Suppression Agents | OLI_THERCLASS_BRSA | 81 |
| Bulk Chemicals | OLI_THERCLASS_BC | 82 |
| Calcium Channel Blocking Agents | OLI_THERCLASS_CCBA | 83 |
| Carbonic Anhydrase Inhibitors | OLI_THERCLASS_CAI | 84 |
| Cardiovascular Diagnostics-Radiopaque | OLI_THERCLASS_CDR | 85 |
| Central Nervous System Stimulants | OLI_THERCLASS_CNSS | 86 |
| Cephalosporins | OLI_THERCLASS_CL | 87 |
| Chemotherapeutics, Antibacterial, Misc. | OLI_THERCLASS_CAMISC | 88 |
| Cholinesterase Inhibitors | OLI_THERCLASS_CI | 89 |
| Colchicine | OLI_THERCLASS_COL | 90 |
| Contraceptives, Oral | OLI_THERCLASS_CO | 91 |
| Cough and /or Cold Preparations | OLI_THERCLASS_CCP | 92 |
| Dental Aids and Preparations | OLI_THERCLASS_DAAP | 93 |
| Diabetic Ulcer Preparations, Topical | OLI_THERCLASS_DUPT | 94 |
| Digitalis Glycosides | OLI_THERCLASS_DG | 95 |
| Diuretics, Miscellaneous | OLI_THERCLASS_DIUMISC | 96 |
| Drugs to Treat Diabetes | OLI_THERCLASS_DTD | 99 |
| Drugs to Treat Impotency | OLI_THERCLASS_DTI | 100 |
| Drugs to TX Chronic Inflammatory. Disease of Colon | OLI_THERCLASS_DTCIDC | 98 |
| Drug TX-Chronic Inflammatory. | OLI_THERCLASS_DTCI | 97 |
| Ear Preparations, Antibiotics | OLI_THERCLASS_EPAB | 102 |
| Ear Preparations, Anti-Inflammatory | OLI_THERCLASS_EPAI | 101 |
| Ear Preparations, Ear Wax Removers | OLI_THERCLASS_EPEWR | 103 |
| Ear Preparations, Local Anesthetics | OLI_THERCLASS_EPLA | 104 |
| Ear Preparations, Miscellaneous | OLI_THERCLASS_EPMISC | 105 |
| Ear Preparations, Miscellaneous, Anti-infectives | OLI_THERCLASS_EPMISCAI | 106 |
| Electrolyte Depleters | OLI_THERCLASS_ED | 107 |
| Emollients | OLI_THERCLASS_EMOL | 108 |
| Estrogen/Androgen Combinations | OLI_THERCLASS_EAC | 109 |
| Estrogenic Agents | OLI_THERCLASS_EA | 110 |
| Expectorants | OLI_THERCLASS_EXP | 111 |
| Eye Antibiotic-Corticoid Combinations | OLI_THERCLASS_EACC | 114 |
| Eye Antihistamines | OLI_THERCLASS_EAH | 115 |
| Eye Anti-infectives | OLI_THERCLASS_EAI | 112 |
| Eye Anti-inflammatory Agents | OLI_THERCLASS_EAIA | 113 |
| Eye Antivirals | OLI_THERCLASS_EAV | 116 |
| Eye Irrigations | OLI_THERCLASS_EI | 117 |
| Eye Local Anesthetics | OLI_THERCLASS_ELA | 118 |
| Eye Preparations, Miscellaneous | OLI_THERCLASS_EPMISC2 | 119 |
| Eye Sulfonamides | OLI_THERCLASS_ES | 120 |
| Eye Vasoconstrictors | OLI_THERCLASS_EVC | 121 |
| Folic Acid Preparations | OLI_THERCLASS_FAP | 122 |
| Follicle Stim./ Lutenizing | OLI_THERCLASS_FSL | 123 |
| Gastric Acid Secretion Reducers | OLI_THERCLASS_GASR | 124 |
| Gastric Enzymes | OLI_THERCLASS_GA | 125 |
| General Bronchodilator Agents | OLI_THERCLASS_GBA | 126 |
| General Inhalation Agents | OLI_THERCLASS_GIA | 127 |
| Glucocorticoids | OLI_THERCLASS_GLUC | 128 |
| Glucocorticoids 2 | OLI_THERCLASS_GLUC2 | 129 |
| Gold Salts | OLI_THERCLASS_GS | 130 |
| Growth Hormones | OLI_THERCLASS_GH | 131 |
| Hair Growth Reduction Agents | OLI_THERCLASS_HGRA | 132 |
| Hemorrheologic Agents | OLI_THERCLASS_HRRHA | 133 |
| Hemorrhoidal Preparation | OLI_THERCLASS_HRRHP | 134 |
| Heparin and Related Preparations | OLI_THERCLASS_HRP | 135 |
| Hepatitis B Treatment Agents | OLI_THERCLASS_HBTA | 136 |
| Hepatitis C Treatment Agents | OLI_THERCLASS_HCTA | 137 |
| Histamines H2-Receptor Inhibitors | OLI_THERCLASS_HH2RI | 138 |
| Hyperglycemics | OLI_THERCLASS_HG | 139 |
| Hypoglycemics, Biguanide type Non-sulfonylureas | OLI_THERCLASS_HGBTNS | 140 |
| Hypoglycemics, Insulin-Release Stimulant Type | OLI_THERCLASS_HGIRST | 142 |
| Hypoglycemics, Insulin Response Enhancer | OLI_THERCLASS_HGIRE | 141 |
| Hypopigmentation Agents | OLI_THERCLASS_HPA | 143 |
| Hypotensive, ACE Blocking Type | OLI_THERCLASS_HTANT | 144 |
| Hypotensive, Sympatholytic | OLI_THERCLASS_HTS | 145 |
| Hypotensive, Vasodilators | OLI_THERCLASS_HTV | 146 |
| Hypotensives, Angiotensin Receptor Antagonist | OLI_THERCLASS_HTARA | 147 |
| Hypotensives, Miscellaneous | OLI_THERCLASS_HTMISC | 148 |
| Immunomodulators | OLI_THERCLASS_IM | 150 |
| Immunosuppresives | OLI_THERCLASS_IS | 151 |
| Insulin | OLI_THERCLASS_INS | 152 |
| Insulins | OLI_THERCLASS_INS2 | 153 |
| Intestinal Modality Stimulants | OLI_THERCLASS_IMS | 154 |
| Iodine Containing Agents | OLI_THERCLASS_ICA | 155 |
| Iron Replacement | OLI_THERCLASS_IR | 156 |
| Irritants/Counter-Irritants | OLI_THERCLASS_ICI | 157 |
| IUD's | OLI_THERCLASS_IUD | 149 |
| Keratolytics | OLI_THERCLASS_KT | 158 |
| Kidney Stone Agents | OLI_THERCLASS_KSA | 159 |
| Laxatives and Cathartics | OLI_THERCLASS_LAC | 160 |
| Leukotriene Receptor Antagonists | OLI_THERCLASS_LRA | 161 |
| Linosamides | OLI_THERCLASS_LS | 162 |
| Lipotropics | OLI_THERCLASS_LT | 163 |
| Lipotropics 2 | OLI_THERCLASS_LT2 | 164 |
| Local Anesthetics | OLI_THERCLASS_LA | 165 |
| Macrolides | OLI_THERCLASS_ML | 166 |
| Maois - Non Selective & Irreversible | OLI_THERCLASS_MNSAI | 167 |
| Mast Cell Stabilizers | OLI_THERCLASS_MCS | 168 |
| Metabolic Deficiency Agents | OLI_THERCLASS_MDA | 169 |
| Metabolic Function Diagnostics | OLI_THERCLASS_MFD | 170 |
| Metallic Poison, Agents to Treat | OLI_THERCLASS_MPATT | 171 |
| Mineralocorticoids | OLI_THERCLASS_MC | 173 |
| Mineral Replacement, Miscellaneous | OLI_THERCLASS_MRM | 172 |
| Miotics/Other Intraoc. Pressure Reducers | OLI_THERCLASS_MOIPR | 174 |
| Miscellaneous | OLI_THERCLASS_MISC | 175 |
| Multivitamin Preparation | OLI_THERCLASS_MVP | 176 |
| Multivitamin Preparations | OLI_THERCLASS_MVP2 | 177 |
| Mycolytics | OLI_THERCLASS_MYC | 178 |
| Mydriatics | OLI_THERCLASS_MYD | 179 |
| Narcotic Antagonists | OLI_THERCLASS_NARCA | 182 |
| Nasal Antihistamines | OLI_THERCLASS_NAH | 183 |
| Niacin Preparations | OLI_THERCLASS_NP | 184 |
| Nitrofuran Derivatives | OLI_THERCLASS_NFD | 185 |
| Norepinephrine and Dopamine Reuptake Inhib. | OLI_THERCLASS_NADRI | 186 |
| Nose Preparations, Antibiotics | OLI_THERCLASS_NPAB | 188 |
| Nose Preparations, Anti-inflammatory | OLI_THERCLASS_NPAI | 187 |
| Nose Preparations, Miscellaneous | OLI_THERCLASS_NPMISC | 189 |
| Nose Preparations, Vasoconstrictors | OLI_THERCLASS_NPVC | 190 |
| NSAIDs, Cyclooxygenase | OLI_THERCLASS_NC | 181 |
| NSAIDs Cyclooxygenase, Inhibitor Type | OLI_THERCLASS_NCIT | 180 |
| Ocular Photoactivated Vessel-Occluding Agents | OLI_THERCLASS_OPVOA | 191 |
| Ophthalmic Anitbiotics | OLI_THERCLASS_OAB | 192 |
| Ophthalmic Mast Cell Stablizers | OLI_THERCLASS_OMCS | 193 |
| Oral Anticoagulants, Coumarin Type | OLI_THERCLASS_OACT | 194 |
| Oral Anticoagulants, Indandione Type | OLI_THERCLASS_OAIT | 195 |
| Oral Mucositis/Stomatitis Anti Inflammatory Agents | OLI_THERCLASS_OMSAIA | 196 |
| Osmotic Diuretics | OLI_THERCLASS_OD | 197 |
| Other | OLI_OTHER | 2147483647 |
| Oxazolidinones | OLI_THERCLASS_OZ | 198 |
| Oxytocics | OLI_THERCLASS_OX | 199 |
| Pancreatic Enzymes | OLI_THERCLASS_PE | 200 |
| Parasympathetic Agents | OLI_THERCLASS_PSA | 201 |
| Penicillins | OLI_THERCLASS_PEN | 202 |
| Photoactivated, Antineopls | OLI_THERCLASS_PAAN | 203 |
| Pituitary Suppressive Agents | OLI_THERCLASS_PSUPA | 204 |
| Platelet Aggregation Inhibitors | OLI_THERCLASS_PAI | 205 |
| Platelet Reducing Agents | OLI_THERCLASS_PRA | 206 |
| Polymyxin and Derivatives | OLI_THERCLASS_PAD | 207 |
| Potassium Replacement | OLI_THERCLASS_PR | 208 |
| Potassium Sparing Diuretics | OLI_THERCLASS_PSD | 209 |
| Prenatal Vitamin Preparations | OLI_THERCLASS_PVP | 210 |
| Progestational Agents | OLI_THERCLASS_PA | 211 |
| Purine Inhibitors | OLI_THERCLASS_PI | 212 |
| Quinolones | OLI_THERCLASS_QUIN | 213 |
| Rectal/Lower Bowel Prep., Glucocorticoid | OLI_THERCLASS_RLBPG | 215 |
| Rectal Preparations | OLI_THERCLASS_RP | 214 |
| Sedative-Hypnotic, Non-Barbiturate | OLI_THERCLASS_SHNB | 216 |
| Selective Retinoid X Receptor Agonist | OLI_THERCLASS_SRXRA | 217 |
| Serotonin -2 Antagonist/Reuptake Inhibitors | OLI_THERCLASS_S2ARI | 218 |
| Serotonin-Norepinephrine Reuptake-Inhib. | OLI_THERCLASS_SNRI | 220 |
| Serotonin Specific Reuptake Inhibitor | OLI_THERCLASS_SSRI | 219 |
| Shampoos/Lotions | OLI_THERCLASS_SL | 221 |
| Skeletal Muscle Relaxants | OLI_THERCLASS_SMR | 222 |
| Smoking Deterrent Agents | OLI_THERCLASS_SDA | 223 |
| Sodium/Saline Preparations | OLI_THERCLASS_SSP | 224 |
| Steroid Antineoplastics | OLI_THERCLASS_SAN | 225 |
| Sympathomimetic Agents | OLI_THERCLASS_STA | 226 |
| Tetracycline | OLI_THERCLASS_TCYC | 227 |
| Thiazide and Related Diuretics | OLI_THERCLASS_TRD | 228 |
| Thyroid Hormones | OLI_THERCLASS_TH | 229 |
| Topical/Mucous Membrane/Subcut. Enzymes | OLI_THERCLASS_TMMSE | 245 |
| Topical/Mucous Membrane Enzymes | OLI_THERCLASS_TMME | 244 |
| Topical Agents, Miscellaneous | OLI_THERCLASS_TAMISC | 230 |
| Topical Antibiotics | OLI_THERCLASS_TAB | 232 |
| Topical Antifungals | OLI_THERCLASS_TAF | 233 |
| Topical Antifungals 2 | OLI_THERCLASS_TAF2 | 234 |
| Topical Anti-Inflammatory Steroids | OLI_THERCLASS_TAUS | 231 |
| Topical Antineoplastics | OLI_THERCLASS_TAN | 235 |
| Topical Antiparasitics | OLI_THERCLASS_TAP | 236 |
| Topical Antivirals | OLI_THERCLASS_TAV | 237 |
| Topical Hemostatics | OLI_THERCLASS_THS | 238 |
| Topical Immunosuppressive | OLI_THERCLASS_TIS | 239 |
| Topical Local Anesthetics | OLI_THERCLASS_TLA | 240 |
| Topical Preparations, Antibacterial | OLI_THERCLASS_TPA | 241 |
| Topical Preparations, Miscellaneous | OLI_THERCLASS_TPMISC | 242 |
| Topical Sulfonamides | OLI_THERCLASS_TS | 243 |
| Trichomonacides | OLI_THERCLASS_TC | 246 |
| Tricyclic Antidepressant/Phenothiazine Combinatns | OLI_THERCLASS_TAPC | 247 |
| Tricyclic Antidepressents & Rel Non-Sel. Ru-Inhib | OLI_THERCLASS_TARNSRI | 248 |
| Unknown | OLI_UNKNOWN | 0 |
| Uricosuric Agents | OLI_THERCLASS_UA | 249 |
| Urinary PH Modifiers | OLI_THERCLASS_UPHM | 250 |
| Urinary Tract, Analgesic Agents | OLI_THERCLASS_UTAA | 252 |
| Urinary Tract, Anesthetic/Analgesic Agents | OLI_THERCLASS_UTAAA | 253 |
| Urinary Tract Antispasmodic Agents | OLI_THERCLASS_UTASA | 251 |
| Vaginal Antibiotics | OLI_THERCLASS_VAB | 254 |
| Vaginal Antifungals | OLI_THERCLASS_VAF | 255 |
| Vaginal Antiseptics | OLI_THERCLASS_VAS | 256 |
| Vaginal Estrogen Preparations | OLI_THERCLASS_VEP | 257 |
| Vaginal Preparation | OLI_THERCLASS_VAGPRREP | 258 |
| Vaginal Sulfonamides | OLI_THERCLASS_VS | 259 |
| Vancomycin and Derivatives | OLI_THERCLASS_VD | 260 |
| Vasodilators, Coronary | OLI_THERCLASS_VC | 261 |
| Vasodilators, Peripheral | OLI_THERCLASS_VASOP | 262 |
| Vitamin A Derivatives | OLI_THERCLASS_VAD | 263 |
| Vitamin A Derivatives, Topical Cosmetic Agents | OLI_THERCLASS_VADTCA | 264 |
| Vitamin B12 Preparations | OLI_THERCLASS_VB12P | 266 |
| Vitamin B Preparations | OLI_THERCLASS_VBP | 265 |
| Vitamin D Preparations | OLI_THERCLASS_VDP | 267 |
| Vitamine B Preparation | OLI_THERCLASS_VPB2 | 269 |
| Vitamin K Preparations | OLI_THERCLASS_VKP | 268 |
| Water | OLI_THERCLASS_W | 270 |
| Xanthines | OLI_THERCLASS_X | 271 |