Anawin
Anawin Uses, Dosage, Side Effects, Food Interaction and all others data.
Anawin is a long acting local anaesthetic of the amide type. It is the S-enantiomer of bupivacaine. It blocks nerve conduction in sensory and motor nerves mainly by interacting with voltage sensitive sodium channels on the cell membrane. It also interferes with impulse transmission and conduction in other tissues. Anawin is given as the hydrochloride for infiltration anaesthesia and regional nerve blocks including epidural block. It is contraindicated in obstetric paracervical block and IV regional anaesthesia (Bier's block). The 0.75% solution is also contraindicated for epidural blocks in obstetrics.
Anawin, a local anesthetic agent, is indicated for the production of local or regional anesthesia or analgesia for surgery, for oral surgery procedures, for diagnostic and therapeutic procedures, and for obstetrical procedures.
Trade Name | Anawin |
Availability | Discontinued |
Generic | Levobupivacaine |
Levobupivacaine Other Names | (S)-bupivacaine, Levobupivacaína, Levobupivacaine |
Type | Injection |
Formula | C18H28N2O |
Weight | Average: 288.4277 Monoisotopic: 288.220163528 |
Protein binding | >97% |
Groups | Approved, Investigational |
Therapeutic Class | Regional anesthesia |
Manufacturer | Neon Laboratories |
Available Country | India |
Last Updated: | September 19, 2023 at 7:00 am |
Uses
For the production of local or regional anesthesia for surgery and obstetrics, and for post-operative pain management
Anawin is also used to associated treatment for these conditions: Pain, Local anesthesia therapy, Lumbar epidural anesthesia therapy
How Anawin works
Local anesthetics such as Anawin block the generation and the conduction of nerve impulses, presumably by increasing the threshold for electrical excitation in the nerve, by slowing the propagation of the nerve impulse, and by reducing the rate of rise of the action potential. In general, the progression of anesthesia is related to the diameter, myelination and conduction velocity of affected nerve fibers. Specifically, the drug binds to the intracellular portion of sodium channels and blocks sodium influx into nerve cells, which prevents depolarization.
Dosage
Anawin dosage
Acute pain: Pain relief during labour: 15-50 mg (6-20 ml) of a 0.25% solution, to be given as a bolus dose; alternatively, dose may be given via continuous infusion at 5-12.5 mg (4-10 ml) per hr using 0.125% solution or 5-12.5 mg (8-20 ml) per hr using 0.0625% solution.
Postoperative pain: 10-25 mg (4-10 ml) per hr of a 0.25% solution, 12.5-18.75 mg (10-15 ml) per hr of a 0.125% solution or 12.5-18.75 mg (20-30 ml) per hr of a 0.0625% solution; dose may be given as an epidural infusion. Max: 150 mg/dose; 400 mg/day.
Peripheral nerve block: 2.5-150 mg or 1-2 mg/kg (0.4 ml/kg) of a 0.25 or 0.5% solution. Not to exceed 40 ml. Max: 150 mg/dose; 400 mg/day.
Surgical anaesthesia: Epidural block: 50-100 mg (10-20 ml) of a 0.5% solution or 75-150 mg (10-20 ml) of a 0.75% solution. Caesarean section: 75-150 mg (15-30 ml) of a 0.5% solution. Spinal block: 15 mg (3 ml) of a 0.5% solution. Max: 150 mg/dose; 400 mg/day.
Infiltration anaesthesia:
- Adult: Up to 150 mg (60 ml) of a 0.25% solution. For peribulbar block in ophth procedures: 37.5-112.5 mg (5-15 ml) of a 0.75% solution. Max: 150 mg/dose; 400 mg/day.
- Child: For ilioinguinal or iliohypogastric blocks in children <12 yr: 0.625-2.5 mg/kg (0.25-0.5 ml/kg) of a 0.25 or 0.5% solution.
When needed, dilutions should be made with normal saline.Not to be used in IV regional anesth (Bier's block) and paracervical block in obstetrics. Do not use 0.75% solution for epidural block in obstetrics. Hypovolaemia, complete heart block.
Side Effects
CNS effects such as restlessness, anxiety, dizziness, confusion, respiratory depression and convulsions. Neuromuscular and skeletal weakness, blurred vision, pupillary constriction, tinnitus. Hypotension, bradycardia and CV collapse which may lead to cardiac arrest. Rarely, hypersensitivity reactions.
Toxicity
LD50: 5.1mg/kg in rabbit, intravenous; 18mg/kg in rabbit, oral; 207mg/kg in rabbit, parenteral; 63mg/kg in rat, subcutaneous (Archives Internationales de Pharmacodynamie et de Therapie. Vol. 200, Pg. 359, 1972.) Anawin appears to cause less myocardial depression than both bupivacaine and ropivacaine, despite being in higher concentrations.
Precaution
Epilepsy, respiratory impairment, impaired cardiac conduction, bradycardia, severe shock, acute porphyria, myasthenia gravis, renal or hepatic impairment. Pregnancy, lactation. Reduce dose in elderly or debilitated patients. Resuscitative equipment should be available. Do not use solutions containing adrenaline for anesth in appendages. Do not use solutions containing preservatives for caudal or epidural block.
Interaction
Plasma levels may be reduced when used with enzyme-inducing drugs such as rifampicin. Substrates for or inhibitors of CYP3A4 and CYP1A2 may affect the plasma levels of levobupivacaine.
Food Interaction
No interactions found.Volume of Distribution
66.91 ±18.23 L [after intravenous administration of 40 mg in healthy volunteers]
Elimination Route
The plasma concentration of levobupivacaine following therapeutic administration depends on dose and also on route of administration, because absorption from the site of administration is affected by the vascularity of the tissue. Peak levels in blood were reached approximately 30 minutes after epidural administration, and doses up to 150 mg resulted in mean Cmax levels of up to 1.2 µg/mL.
Half Life
3.3 hours
Clearance
39.06 ±13.29 L/h [after intravenous administration of 40 mg in healthy volunteers]
Elimination Route
Following intravenous administration, recovery of the radiolabelled dose of levobupivacaine was essentially quantitative with a mean total of about 95% being recovered in urine and feces in 48 hours. Of this 95%, about 71% was in urine while 24% was in feces.
Pregnancy & Breastfeeding use
Pregnancy Category B. Either animal-reproduction studies have not demonstrated a foetal risk but there are no controlled studies in pregnant women or animal-reproduction studies have shown an adverse effect (other than a decrease in fertility) that was not confirmed in controlled studies in women in the 1st trimester (and there is no evidence of a risk in later trimesters).
Contraindication
Not to be used in IV regional anesth (Bier's block) and paracervical block in obstetrics. Do not use 0.75% solution for epidural block in obstetrics. Hypovolaemia, complete heart block.
Storage Condition
To be used immediately after opening. After dilution in normal saline: Chemical and physical in-use stability at 20-22°C for 7 days.
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