Amoxicillin SP (Canada)

Company: Bio Agri Mix

DIN 02447584

For Swine and Chickens

AMOXICILLIN SOLUBLE POWDER (Mfr. Std.)

FOR VETERINARY USE ONLY

Description

AMOXICILLIN SP is a soluble powder containing 800 mg/g amoxicillin trihydrate (equivalent to 697 mg amoxicillin). AMOXICILLIN SP will not block nipple drinkers or water lines. The maximum solubility of AMOXICILLIN SP is 3 g/litre, although solubility may be increased by use of water conditioner powder.

Amoxicillin SP Indications

AMOXICILLIN SP is indicated for the treatment of infections caused by bacteria susceptible to amoxicillin, including:

Chickens: Colibacillosis, peritonitis caused by non-β-lactamase-producing E. coli

Salmonellosis caused by non-β-lactamase-producing Salmonella enterica subsp. enterica

Respiratory tract infections caused by non-β-lactamase-producing E. coli

Swine: Respiratory infections caused by Actinobacillus pleuropneumoniae

Arthritis and meningitis caused by S. suis

Secondary infections due to ear and tail-biting

Dosage and Administration

It is recommended to administer AMOXICILLIN SP once daily via the drinking water, using either a tank or water proportioner. It is advisable to restrict drinking water for approximately 2 hours (less in hot weather) prior to medication. Each 15 ml measure (provided in the packaging) will contain approximately 10 grams of AMOXICILLIN SP.

Chickens: The recommended dosage is 10-20 mg AMOXICILLIN SP, to provide 8-16 mg amoxicillin trihydrate, per kg body weight per day, for a period of 3-5 consecutive days. The higher dosage is advised when treating severe infections. To calculate the amount of AMOXICILLIN SP required per day, the following formula may be used:

Tank Method: Ensure there is no access to unmedicated water while medicated water is being offered. Any unused medicated water should be discarded immediately after the treatment period. Make a stock solution, by scattering the calculated amount of AMOXICILLIN SP onto the surface of 5-10 litres of water and stir until completely dissolved. Dilute this stock solution by stirring into a tank of water sufficient to provide the volume of medicated drinking water that will be consumed in approximately two hours. The normal water supply should be resumed after this time.

Water Proportioner Method: To calculate the amount of AMOXICILLIN SP required to medicate the total daily drinking water intake, the following is a guide:

Birds 0-4 weeks of age: 6 - 12 g AMOXICILLIN SP/100 litres of water

Birds older than 4 weeks: 10 - 20 g AMOXICILLIN SP/100 litres of water

Make a stock solution, by scattering the calculated amount of AMOXICILLIN SP onto the surface of 5 - 10 litres of water and stir until completely dissolved. Dilute this stock solution by using a water proportioner calibrated to deliver medicated drinking water containing the appropriate concentration of AMOXICILLIN SP, sufficient to provide the volume of medicated drinking water that will be consumed in approximately two hours. The normal water supply should be resumed after this time.

Pigs: The recommended dosage is 20 mg AMOXICILLIN SP, to provide 16 mg amoxicillin trihydrate, per kg body weight per day, equivalent to 1 g AMOXICILLIN SP per 50 kg body weight per day, administered via the drinking water for a period of 3 - 5 consecutive days.

Tank Method: Ensure there is no access to unmedicated water while medicated water is being offered. Any unused medicated water should be discarded immediately after the treatment period.

Make a stock solution, by scattering the calculated amount of AMOXICILLIN SP onto the surface of 5 - 10 litres of water and stir. Dilute this stock solution by stirring into a tank of water sufficient to provide the volume of medicated drinking water that will be consumed in approximately two hours. The normal water supply should be resumed after this time.

Water Proportioner Method: To calculate the amount of AMOXICILLIN SP required to medicate the total daily drinking water intake, the following is a guide:

Pigs younger than 4 months: 20 g AMOXICILLIN SP/100 litres of water

Pigs older than 4 months: 30 g AMOXICILLIN SP/100 litres of water

Make a stock solution, by scattering the calculated amount of AMOXICILLIN SP onto the surface of 5 - 10 litres of water and stir until completely dissolved. Dilute this stock solution by using a water proportioner calibrated to deliver medicated drinking water containing the appropriate concentration of AMOXICILLIN SP, sufficient to provide the volume of medicated drinking water that will be consumed in approximately two hours. The normal water supply should be resumed after this time.

Contraindications

Amoxicillin exerts its bactericidal action by inhibition of bacterial cell wall synthesis during multiplication. It is therefore, in principle, not compatible with bacteriostatic antibiotics, for example tetracyclines which inhibit multiplication. Synergism may occur with other β-lactam antibiotics and aminoglycosides.

CAUTIONS:

1. Use of the product should be based on susceptibility testing because of reported resistance (up to 50%) in E. coli and Salmonella spp. from chickens. Inappropriate use of the product may increase the prevalence of bacteria resistant to amoxicillin and may decrease its effectiveness.

2. AMOXICILLIN SP is not effective against β-lactamase producing organisms. AMOXICILLIN SP should not be administered to animals sensitive to penicillins.

3. As with other penicillin-containing preparations, this product should not be given orally or parenterally to small herbivores such as guinea pigs, hamsters and rabbits.

4. Prolonged exposure (> 1 hour) of amoxicillin solutions to galvanized steel watering troughs, bowls or buckets will inactivate this drug. Studies have shown that this may be accelerated in the presence of hard water, temperatures above 25°C, and higher amoxicillin dose levels.

Warnings

1. Treated chickens must not be slaughtered for use in food for at least two (2) days following the latest treatment with this drug.

2. Treated pigs must not be slaughtered for use in food for at least three (3) days following the latest treatment with this drug.

3. Do not use in laying birds.

4. Persons who are allergic to penicillins and cephalosporins should avoid direct contact with the product.

5. To limit the development of antimicrobial resistance, the choice of this drug as the most appropriate treatment should be confirmed by clinical experience supported, where possible, by pathogen culture and drug susceptibility testing.

6. Keep out of reach of children.

Pharmacology

Amoxicillin is rapidly absorbed after oral administration. It demonstrates a low capacity for protein-binding and is widely distributed in various tissues after absorption. Amoxicillin is primarily excreted via the kidneys into the urine and circulated via the liver into the bile.

Amoxicillin, like all beta-lactam antibiotics, prevents the bacterial cell wall from forming by interfering with the final stage of peptidoglycan synthesis. Amoxicillin inhibits the activity of the transpeptidase and other peptidoglycan-active enzymes which catalyze the cross-linkage of the glycopeptide polymer units. This leads to rupture of the cytoplasmic membrane through the weakened section and formation of a spheroplast. The drug exerts its bactericidal action only in growing cells, that is, cells undergoing cell wall synthesis.

SUSCEPTIBILITY OF POULTRY AND SWINE TARGET PATHOGENS TO AMOXICILLIN

¹ MIC = minimal inhibitory concentration; MIC₅₀ and MIC₉₀ are drug concentrations which inhibit 50% and 90% of the isolates, respectively.

² MIC₅₀ was calculated by including the susceptible population only. The resistance breakpoint R of amoxicillin against Enterobacteriaceae is R ≥ 32 µg/mL (CLSI document M 31-A2). According to the resistance breakpoint the MIC₅₀ of 4 µg/mL represents the value for 49 susceptible isolates out of 104 broiler E. coli isolates tested (equals 47% susceptible population).

Storage

Store below 30°C in a dry place.

Any unused medicated water should be discarded immediately after use.

PACKAGING:

AMOXICILLIN SP is available in containers of 250 g,1 kg, 5 kg or 14 kg.

Manufactured and Distributed by: Bio Agri Mix LP, PO Box 399, Mitchell, ON N0K 1N0

CONTAINS ANTIMICROBIAL

USE RESPONSIBLY

9645-02, JUL/18

CPN: 1161043.3