| Stereochemistry | ABSOLUTE |
| Molecular Formula | C29H41NO4 |
| Molecular Weight | 467.6401 |
| Optical Activity | ( - ) |
| Defined Stereocenters | 7 / 7 |
| E/Z Centers | 0 |
| Charge | 0 |
SHOW SMILES / InChI
SMILES
CO[C@]12CC[C@@]3(C[C@@H]1[C@](C)(O)C(C)(C)C)[C@H]4CC5=C6C(O[C@@H]2[C@@]36CCN4CC7CC7)=C(O)C=C5
InChI
InChIKey=RMRJXGBAOAMLHD-IHFGGWKQSA-N
InChI=1S/C29H41NO4/c1-25(2,3)26(4,32)20-15-27-10-11-29(20,33-5)24-28(27)12-13-30(16-17-6-7-17)21(27)14-18-8-9-19(31)23(34-24)22(18)28/h8-9,17,20-21,24,31-32H,6-7,10-16H2,1-5H3/t20-,21-,24-,26+,27-,28+,29-/m1/s1
| Molecular Formula | C29H41NO4 |
| Molecular Weight | 467.6401 |
| Charge | 0 |
| Count |
MOL RATIO
1 MOL RATIO (average) |
| Stereochemistry | ABSOLUTE |
| Additional Stereochemistry | No |
| Defined Stereocenters | 7 / 7 |
| E/Z Centers | 0 |
| Optical Activity | UNSPECIFIED |
Buprenorphine is an opioid analgesic, used to treat opioid addiction, moderate acute pain, and moderate chronic pain. Buprenorphine is a partial agonist at the mµ-opioid receptor and an antagonist at the kappa-opioid receptor. One unusual property of buprenorphine observed in vitro studies is its very slow rate of dissociation from its receptor. This could account for its longer duration of action than morphine, the unpredictability of its reversal by opioid antagonists, and its low level of manifest physical dependence. The principal action of the therapeutic value of buprenorphine is analgesia and is thought to be due to buprenorphine binding with high affinity to opioid receptors on neurons in the brain and spinal cord. Buprenorphine produces respiratory depression by direct action on brain stem respiratory centers. The respiratory depression involves a reduction in the responsiveness of the brain stem respiratory centers to both increases in carbon dioxide tension and electrical stimulation. Buprenorphine causes a reduction in motility associated with an increase in smooth muscle tone in the antrum of the stomach and duodenum. Digestion of food in the small intestine is delayed and propulsive contractions are decreased. Buprenorphine produces peripheral vasodilation, which may result in orthostatic hypotension or syncope. Manifestations of histamine release and/or peripheral vasodilation may include pruritus, flushing, red eyes, sweating, and/or orthostatic hypotension.
CNS Activity
Originator
Approval Year
Doses
AEs
Sourcing
Sample Use Guides
The initial starting dose is 1 mL buprenorphine hydrochloride injection (0.3 mg buprenorphine) given by deep intramuscular or slow (over at least 2 minutes) intravenous injection at up to 6-hour intervals, as needed.
Repeat once (up to 0.3 mg) if required, 30 to 60 minutes after initial dosage, giving consideration to previous dose pharmacokinetics, and thereafter only as needed. In high-risk patients (e.g., elderly, debilitated, presence of respiratory disease, etc.) and/or in patients where other CNS depressants are present, such as in the immediate postoperative period, the dose should be limited to the minimum required.
Buprenorphine hydrochloride has been used in pediatric patients 2 to 12 years of age at doses between 2 to 6 micrograms/kg of body weight given every 4 to 6 hours. There is insufficient experience to recommend a dose in infants below the age of two years, single doses greater than 6 micrograms/kg of body weight, or the use of a repeat or second dose at 30 to 60 minutes (such as is used in adults).
Route of Administration:
Other
Functional activity of μ receptors in intact cells was determined by measuring receptor-induced membrane potential change, which can be directly read by Molecular Devices Membrane Potential Assay Kit (Blue Dye) using the FlexStation 3® microplate reader. CHO cells transfected with human μ-opioid receptors were seeded in a 96-well plate (30 000 cells per well) 1 day prior to the experiments. For agonist assays, after brief washing, the cells were loaded with 225 μL of HBSS assay buffer (HBSS with 20 mM of HEPES, pH 7.4), containing the blue dye, and incubated at 37°C. After 30 min, 25 μL of the Buprenorphine were automatically dispensed into the wells by the FlexStation and receptor stimulation-mediated membrane potential change is recorded every 3 s for 60 s by reading 550–565 nm fluorescence excited at 530 nm wavelength.
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