| ATC | R06AA | Aminoalkyl ethers | ATC1-4 | | diphenhydramine |
| ATC | N02BE | Anilides | ATC1-4 | | acetaminophen |
| ATC | D04AA | Antihistamines for topical use | ATC1-4 | | diphenhydramine |
| ATC | R05DA | Opium alkaloids and derivatives | ATC1-4 | | dextromethorphan |
| FDASPL | N0000175587 | Histamine-1 Receptor Antagonist | EPC | has_epc | diphenhydramine |
| FDASPL | N0000182149 | Sigma-1 Agonist | EPC | has_epc | dextromethorphan |
| FDASPL | N0000181821 | Uncompetitive N-methyl-D-aspartate Receptor Antagonist | EPC | has_epc | dextromethorphan |
| FDASPL | N0000000190 | Histamine H1 Receptor Antagonists | MOA | has_moa | diphenhydramine |
| FDASPL | N0000182147 | Sigma-1 Receptor Agonists | MOA | has_moa | dextromethorphan |
| FDASPL | N0000181819 | Uncompetitive NMDA Receptor Antagonists | MOA | has_moa | dextromethorphan |
| MEDRT | D000082 | Acetaminophen | CHEM | has_ingredient | acetaminophen |
| MEDRT | D003915 | Dextromethorphan | CHEM | has_ingredient | dextromethorphan |
| MEDRT | D003915 | Dextromethorphan | CHEM | has_ingredient | dextromethorphan hydrobromide |
| MEDRT | D004155 | Diphenhydramine | CHEM | has_ingredient | diphenhydramine hydrochloride |
| MEDRT | D004155 | Diphenhydramine | CHEM | has_ingredient | diphenhydramine |
| MEDRT | D001008 | Anxiety Disorders | DISEASE | may_treat | diphenhydramine hydrochloride |
| MEDRT | D001008 | Anxiety Disorders | DISEASE | may_treat | diphenhydramine |
| MEDRT | D003371 | Cough | DISEASE | may_treat | dextromethorphan |
| MEDRT | D003371 | Cough | DISEASE | may_prevent | dextromethorphan |
| MEDRT | D003371 | Cough | DISEASE | may_treat | dextromethorphan hydrobromide |
| MEDRT | D003371 | Cough | DISEASE | may_prevent | dextromethorphan hydrobromide |
| MEDRT | D004342 | Drug Hypersensitivity | DISEASE | ci_with | diphenhydramine hydrochloride |
| MEDRT | D004342 | Drug Hypersensitivity | DISEASE | ci_with | diphenhydramine |
| MEDRT | D004342 | Drug Hypersensitivity | DISEASE | ci_with | acetaminophen |
| MEDRT | D004342 | Drug Hypersensitivity | DISEASE | ci_with | dextromethorphan |
| MEDRT | D004342 | Drug Hypersensitivity | DISEASE | ci_with | dextromethorphan hydrobromide |
| MEDRT | D005334 | Fever | DISEASE | may_prevent | acetaminophen |
| MEDRT | D005334 | Fever | DISEASE | may_treat | acetaminophen |
| MEDRT | D005955 | Glucosephosphate Dehydrogenase Deficiency | DISEASE | ci_with | acetaminophen |
| MEDRT | D007231 | Infant, Newborn | DISEASE | ci_with | diphenhydramine hydrochloride |
| MEDRT | D007231 | Infant, Newborn | DISEASE | ci_with | diphenhydramine |
| MEDRT | D007234 | Infant, Premature | DISEASE | ci_with | diphenhydramine hydrochloride |
| MEDRT | D007234 | Infant, Premature | DISEASE | ci_with | diphenhydramine |
| MEDRT | D007774 | Lactation | DISEASE | ci_with | diphenhydramine |
| MEDRT | D007774 | Lactation | DISEASE | ci_with | diphenhydramine hydrochloride |
| MEDRT | D008107 | Liver Diseases | DISEASE | ci_with | acetaminophen |
| MEDRT | D009041 | Motion Sickness | DISEASE | may_treat | diphenhydramine |
| MEDRT | D009041 | Motion Sickness | DISEASE | may_treat | diphenhydramine hydrochloride |
| MEDRT | D009325 | Nausea | DISEASE | may_treat | diphenhydramine |
| MEDRT | D009325 | Nausea | DISEASE | may_treat | diphenhydramine hydrochloride |
| MEDRT | D010146 | Pain | DISEASE | may_treat | acetaminophen |
| MEDRT | D010146 | Pain | DISEASE | may_prevent | acetaminophen |
| MEDRT | D012221 | Rhinitis, Allergic, Perennial | DISEASE | may_treat | diphenhydramine hydrochloride |
| MEDRT | D012221 | Rhinitis, Allergic, Perennial | DISEASE | may_treat | diphenhydramine |
| MEDRT | D007319 | Sleep Initiation and Maintenance Disorders | DISEASE | may_treat | diphenhydramine |
| MEDRT | D007319 | Sleep Initiation and Maintenance Disorders | DISEASE | may_treat | diphenhydramine hydrochloride |
| MEDRT | D012912 | Sneezing | DISEASE | may_treat | diphenhydramine |
| MEDRT | D012912 | Sneezing | DISEASE | may_treat | diphenhydramine hydrochloride |
| MEDRT | D013224 | Status Asthmaticus | DISEASE | ci_with | diphenhydramine |
| MEDRT | D013224 | Status Asthmaticus | DISEASE | ci_with | diphenhydramine hydrochloride |
| MEDRT | D014581 | Urticaria | DISEASE | may_treat | diphenhydramine hydrochloride |
| MEDRT | D014581 | Urticaria | DISEASE | may_treat | diphenhydramine |
| MEDRT | N0000000190 | Histamine H1 Receptor Antagonists | MOA | has_moa | diphenhydramine hydrochloride |
| MEDRT | N0000000190 | Histamine H1 Receptor Antagonists | MOA | has_moa | diphenhydramine |
| MEDRT | N0000000184 | Monoamine Oxidase Inhibitors | MOA | ci_moa | dextromethorphan |
| MEDRT | N0000000184 | Monoamine Oxidase Inhibitors | MOA | ci_moa | dextromethorphan hydrobromide |
| MEDRT | N0000000108 | Prostaglandin Receptor Antagonists | MOA | has_moa | acetaminophen |
| MEDRT | N0000000109 | Serotonin Uptake Inhibitors | MOA | has_moa | dextromethorphan hydrobromide |
| MEDRT | N0000000109 | Serotonin Uptake Inhibitors | MOA | has_moa | dextromethorphan |
| MEDRT | N0000182147 | Sigma-1 Receptor Agonists | MOA | has_moa | dextromethorphan hydrobromide |
| MEDRT | N0000182147 | Sigma-1 Receptor Agonists | MOA | has_moa | dextromethorphan |
| MEDRT | N0000181819 | Uncompetitive NMDA Receptor Antagonists | MOA | has_moa | dextromethorphan hydrobromide |
| MEDRT | N0000181819 | Uncompetitive NMDA Receptor Antagonists | MOA | has_moa | dextromethorphan |
| MEDRT | N0000175724 | Central Nervous System Activity Alteration | PE | has_pe | acetaminophen |
| MEDRT | N0000008701 | Decreased Medullary Respiratory Drive | PE | has_pe | dextromethorphan |
| MEDRT | N0000008701 | Decreased Medullary Respiratory Drive | PE | has_pe | dextromethorphan hydrobromide |
| MEDRT | N0000008836 | Decreased Prostaglandin Production | PE | has_pe | acetaminophen |
| MEDRT | N0000009072 | Hypothalamic Endocrine Activity Alteration | PE | has_pe | acetaminophen |
| MEDRT | N0000175725 | Peripheral Nervous System Activity Alteration | PE | has_pe | acetaminophen |
| MEDRT | N0000000026 | Hepatic Metabolism | PK | has_pk | acetaminophen |
| MEDRT | N0000000042 | Renal Excretion | PK | has_pk | acetaminophen |