Product InformationRegistration Status: Active
DBL PROMETHAZINE HYDROCHLORIDE INJECTION BP 50mg/2ml is approved to be sold in Singapore with effective from 1989-03-05. It is marketed by HOSPIRA SINGAPORE PTE LTD, with the registration number of SIN02707P.
This product contains Promethazine 50mg in the form of INJECTION. It is approved for INTRAVENOUS, INTRAMUSCULAR use.
This product is manufactured by HOSPIRA AUSTRALIA PTY LTD in GERMANY, andHameln Pharmaceuticals GmbH in AUSTRALIA.
It is a Prescription Only Medicine that can only be obtained from a doctor or a dentist, or a pharmacist with a prescription from a Singapore-registered doctor or dentist.
A phenothiazine derivative with histamine H1-blocking, antimuscarinic, and sedative properties. It is used as an antiallergic, in pruritus, for motion sickness and sedation, and also in animals. [PubChem]
For the treatment of allergic disorders, and nausea/vomiting.
Mechanism of Action
Like other H1-antagonists, promethazine competes with free histamine for binding at H1-receptor sites in the GI tract, uterus, large blood vessels, and bronchial muscle. The relief of nausea appears to be related to central anticholinergic actions and may implicate activity on the medullary chemoreceptor trigger zone.
- On average, 88% of a promethazine dose is absorbed after oral administration; however, the absolute bioavailability is only 25% because of first-pass clearance.
Symptoms of overdose include mild depression of the central nervous system and cardiovascular system to profound hypotension, respiratory depression, unconsciousness, and sudden death. Other reported reactions include hyperreflexia, hypertonia, ataxia, athetosis, and extensor-plantar reflexes (Babinski reflex). LD50=55mg/kg (I.V. in mice)
(2-dimethylamino-2-methyl)ethyl-N-dibenzoparathiazine | 10-(2-Dimethylaminopropyl)phenothiazine | 10-[2-(dimethylamino)Propyl]phenothiazine | N-(2'-dimethylamino-2'-Methyl)ethylphenothiazine | N,N,alpha-Trimethyl-10H-phenothiazine-10-ethanamine | N,N,α-trimethyl-10H-phenothiazine-10-ethanamine | Proazamine | Prometazina | Promethazine | Promethazinum | Promethazine |
Source of information: Drugbank (External Link). Last updated on: 3rd July 18. *Trade Name used in the content below may not be the same as the HSA-registered product.