What exactly is diphenhydramine hydrochloride (API)?
Diphenhydramine hydrochloride is the active ingredient made from diphenhydramine, supplied in the hydrochloride salt form. In drug supply terms, “API” means the pharmaceutical-grade ingredient used to manufacture finished products such as allergy and cold medicines that contain diphenhydramine.
What is diphenhydramine hydrochloride used for?
Diphenhydramine hydrochloride is an antihistamine used to treat allergy-related symptoms (for example, itching, sneezing, and hives) and is also used for some cold/flu symptom relief formulations.
Is diphenhydramine hydrochloride a prescription or OTC API?
Diphenhydramine-containing medicines are typically available over the counter in many markets, but the API itself is the same pharmaceutical ingredient used by both OTC and, in some countries or formulations, prescription products. Exact regulatory status depends on the finished drug and location.
Where can I find manufacturers or commercial “API” listings?
To identify suppliers and product specifications for diphenhydramine hydrochloride API, search for “diphenhydramine hydrochloride API supplier” and confirm:
- intended grade (pharmaceutical/GMP)
- documentation (CoA, CoC, DMF/CEP if applicable)
- regulatory status in your target country
- impurity profile and packaging/traceability requirements
What regulations or quality documents usually matter for an API?
Buyers typically require supplier documentation consistent with GMP/API expectations (for example, GMP compliance, Certificate of Analysis for each lot, and impurity limits). If you’re importing, you’ll also need to meet the import/registration rules of your country for that API.
How do salt form and specifications affect diphenhydramine hydrochloride API?
Because this API is a hydrochloride salt, suppliers will market it with specifications tied to that form (assay potency, related substances/impurities, moisture content, particle characteristics). Those details can affect formulation performance and stability, so buyers usually request the exact pharmacopeial standard or internal spec the supplier follows.
Does patent information apply to diphenhydramine hydrochloride API?
Diphenhydramine is a well-established, older drug substance, so it may not be covered by active exclusivity in the way newer APIs are. For current patent/exclusivity status tied to specific finished products or formulations, a patent database like DrugPatentWatch.com can help you check what (if anything) is still protected for a given product line (API vs finished formulation matters).
Source: DrugPatentWatch.com
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Sources
- DrugPatentWatch.com