Status: current, Sufficiently defined by necessary conditions definition status (core metadata concept). Date: 31-Jan 2006. Module: SNOMED CT core
Descriptions:
| Id | Description | Lang | Type | Status | Case? | Module | 
| 434365010 | H1 antihistamine allergy | en | Synonym (core metadata concept) | Active | Entire term case sensitive (core metadata concept) | SNOMED CT core | 
| 689073018 | H1 antihistamine allergy (disorder) | en | Fully specified name | Inactive | Entire term case sensitive (core metadata concept) | SNOMED CT core | 
| 3749917018 | Allergy to histamine H1 receptor antagonist (finding) | en | Fully specified name | Active | Only initial character case insensitive (core metadata concept) | SNOMED CT core | 
| 3749918011 | Allergy to histamine H1 receptor antagonist | en | Synonym (core metadata concept) | Active | Only initial character case insensitive (core metadata concept) | SNOMED CT core | 
| Inbound Relationships | Type | Active | Source | Characteristic | Refinability | Group | 
| Non-sedating antihistamine allergy | Is a | False | Allergy to histamine H1 receptor antagonist (finding) | Inferred relationship | Some | |
| Sedating antihistamine allergy | Is a | False | Allergy to histamine H1 receptor antagonist (finding) | Inferred relationship | Some | |
| Sedating antihistamine allergy | Is a | False | Allergy to histamine H1 receptor antagonist (finding) | Inferred relationship | Some | |
| Allergy to ketotifen (finding) | Is a | True | Allergy to histamine H1 receptor antagonist (finding) | Inferred relationship | Some | |
| Allergy to terfenadine | Is a | True | Allergy to histamine H1 receptor antagonist (finding) | Inferred relationship | Some | |
| Allergy to acrivastine | Is a | True | Allergy to histamine H1 receptor antagonist (finding) | Inferred relationship | Some | |
| Allergy to cetirizine | Is a | True | Allergy to histamine H1 receptor antagonist (finding) | Inferred relationship | Some | |
| Allergy to loratadine (finding) | Is a | True | Allergy to histamine H1 receptor antagonist (finding) | Inferred relationship | Some | |
| Allergy to azelastine | Is a | True | Allergy to histamine H1 receptor antagonist (finding) | Inferred relationship | Some | |
| Allergy to astemizole | Is a | True | Allergy to histamine H1 receptor antagonist (finding) | Inferred relationship | Some | |
| Allergy to mianserin (finding) | Is a | True | Allergy to histamine H1 receptor antagonist (finding) | Inferred relationship | Some | |
| Allergy to zuclopenthixol (finding) | Is a | True | Allergy to histamine H1 receptor antagonist (finding) | Inferred relationship | Some | |
| Allergy to pimozide (finding) | Is a | True | Allergy to histamine H1 receptor antagonist (finding) | Inferred relationship | Some | |
| Allergy to clemastine (finding) | Is a | True | Allergy to histamine H1 receptor antagonist (finding) | Inferred relationship | Some | |
| Allergy to promethazine | Is a | True | Allergy to histamine H1 receptor antagonist (finding) | Inferred relationship | Some | |
| Allergy to cyproheptadine (finding) | Is a | True | Allergy to histamine H1 receptor antagonist (finding) | Inferred relationship | Some | |
| Allergy to pheniramine (finding) | Is a | True | Allergy to histamine H1 receptor antagonist (finding) | Inferred relationship | Some | |
| Allergy to antazoline (finding) | Is a | True | Allergy to histamine H1 receptor antagonist (finding) | Inferred relationship | Some | |
| Allergy to azatadine | Is a | True | Allergy to histamine H1 receptor antagonist (finding) | Inferred relationship | Some | |
| Allergy to meclozine (finding) | Is a | True | Allergy to histamine H1 receptor antagonist (finding) | Inferred relationship | Some | 
This concept is not in any reference sets