Moxidectin

Indications

ProHeart 12 is indicated for use in dogs 12 months of age and older for the prevention of heartworm disease caused by Dirofilaria immitis for 12 months. ProHeart 12 is indicated for the treatment of existing larval and adult hookworm ( Ancylostoma caninum and Uncinaria stenocephala ) infections.

Dosage and Administration

Always provide Client Information Sheet and review with owners before administering ProHeart 12. The owner should be advised to observe their dog for adverse drug events including those described on the sheet. The Client Information Sheet is attached to this package insert and available online at http://www.proheart12.com for reprinting to provide to the owner. Frequency of Treatment: ProHeart 12 prevents the development of heartworm disease caused by D. immitis for 12 months. For dogs not previously on heartworm preventive or having lapsed beyond 12 months of a prior ProHeart 12 dose, the product should be given within 1 month of exposure to mosquitoes. Follow-up treatments may be given every 12 months, if the dog continues to be healthy and without weight loss, to provide continuous year-round protection. When replacing a monthly heartworm preventive product, ProHeart 12 should be given within one month of the last dose of the former medication to avoid a gap in protection. ProHeart 12 eliminates the larval and adult stages of A. caninum and U. stenocephala present at the time of treatment. Re-infection with A. caninum and U. stenocephala may occur sooner than 12 months. Dose: The recommended subcutaneous dose is 0.05 mL of the constituted suspension/kg body weight (0.023 mL/lb). This amount of suspension will provide 0.5 mg moxidectin/kg body weight (0.23 mg/lb). To ensure accurate dosing, calculate each dose based on the dog’s weight at the time of treatment. The following table provides a guide for weight specific dose volumes. Table 1: Dosage Guide Dog Weight Dose Volume* mL/Dog Pounds (lb) Kilograms (kg) 11 lb 5 kg 0.25 22 lb 10 kg 0.50 33 lb 15 kg 0.75 44 lb 20 kg 1.00 55 lb 25 kg 1.25 66 lb 30 kg 1.50 77 lb 35 kg 1.75 88 lb 40 kg 2.00 99 lb 45 kg 2.25 110 lb 50 kg 2.50 121 lb 55 kg 2.75 132 lb 60 kg 3.00 *All dogs should be dosed at 0.05 mL suspension/kg body weight (0.023 mL /lb). Injection Technique: ProHeart 12 must be prepared at least 30 minutes prior to the first use by adding the sterile vehicle to the microspheres. (See CONSTITUTION PROCEDURES for initial mixing instructions.) Swirl the constituted product vial gently before every use to uniformly re-suspend the microspheres. Withdraw 0.05 mL of suspension/kg body weight (0.023 mL/lb) into an appropriately sized syringe fitted with an 18G or 20G hypodermic needle. Dose promptly after drawing into dosing syringe. If administration is delayed, gently roll the dosing syringe prior to injection to maintain a uniform suspension and accurate dosing. Using aseptic technique, inject the product subcutaneously in the left or right side of the dorsum of the neck cranial to the scapula. No more than 3 mL should be administered in a single site. The location(s) of each injection (left or right side) should be noted so that prior injection sites can be identified and the next injection can be administered on the opposite side. RISK MINIMIZATION ACTION PLAN The ProHeart 12 and ProHeart 6 Risk Minimization Action Plan (RiskMAP) provides educational materials to the veterinarian, veterinary staff, and the dog owner explaining the risks and proper use of ProHeart 12 and ProHeart 6. ProHeart 12 and ProHeart 6 are the same formulation, but ProHeart 12 is three times the concentration of ProHeart 6. ProHeart 12 and ProHeart 6 are for use in dogs only and are available through a restricted distribution program to veterinarians that have completed the RiskMAP training and certification module. The ProHeart 12 and ProHeart 6 web-based training and certification module is available at http://www.proheart12.com. This website has important information on the safe and effective use of ProHeart 12 and ProHeart 6 for veterinarians. Only veterinarians and veterinary technicians/assistants that have completed the training and are certified can administer ProHeart 12 and ProHeart 6. Veterinarians are expected to report all adverse events that occur in animals or humans to the manufacturer. Important safety information is included below:

Contraindications

ProHeart 12 is contraindicated in animals previously found to be hypersensitive to this drug or ProHeart 6. HUMAN WARNINGS Not for human use. Keep this and all drugs out of the reach of children. If contact with your skin occurs, wash thoroughly with water. May be irritating to the eyes. If product accidentally gets into your eyes, flush eyes thoroughly with water. In case of accidental ingestion, or if skin or eye irritation occurs, contact a Poison Control Center or physician for treatment advice and show the package insert to the physician. Take care to avoid accidental self-injection. In case of accidental self-injection, seek medical advice and show the package insert or the label to the physician. The Safety Data Sheet (SDS) contains more detailed occupational safety information.

Warnings

Anaphylactic and anaphylactoid reactions may occur in some dogs following administration of ProHeart 12 alone or with vaccines. In some cases, these reactions have resulted in death following administration of moxidectin microspheres (see POST-APPROVAL EXPERIENCE ). Anaphylactic and anaphylactoid reactions should be treated immediately with the same measures used to treat hypersensitivity reactions to vaccines and other injectable products. Always provide Client Information Sheet and review with owners before administering ProHeart 12. The owner should be advised to observe their dog for adverse drug events including those described on the sheet. Do not administer ProHeart 12 to dogs who are sick, debilitated, underweight or who have a history of weight loss.

Precautions

Prior to administration of ProHeart 12, the health of the patient should be assessed by a thorough medical history, physical examination and diagnostic testing as indicated (see WARNINGS ). Caution should be used when administering ProHeart 12 in dogs with pre-existing allergic disease, including food allergy, atopy, and flea allergy dermatitis. (see WARNINGS ). Caution should be used when administering ProHeart 12 concurrently with vaccinations. Adverse reactions, including anaphylaxis, have been reported following the concomitant use of moxidectin microspheres and vaccinations (see WARNINGS and POST-APPROVAL EXPERIENCE ). ProHeart 12 should not be used more frequently than every 12 months. The effectiveness of ProHeart 12 has not been evaluated in dogs less than 12 months of age. Prior to administration of ProHeart 12, dogs should be tested for existing heartworm infections. Infected dogs should be treated with an adulticide to remove adult heartworms. ProHeart 12 is not effective against adult D. immitis . Caution should be used when administering ProHeart 12 to heartworm positive dogs (see ADVERSE REACTIONS ).

Adverse Reactions

A well-controlled field study was conducted, including a total of 593 dogs (297 received two doses of ProHeart 12, 12 months apart and 296 received a monthly oral heartworm preventive as active control) ranging in age from 1 to 14 years. Over the 605-day study period, all observations of potential adverse reactions were recorded. Table 2: Number of Dogs* with Adverse Reactions Reported During the ProHeart 12 Field Study Adverse Reaction ProHeart® 12 n=297 (%) Active Control n=296 (%) Vomiting 75 (25.3) 78 (26.4) Lethargy 46 (15.5) 34 (11.5) Diarrhea (with and without blood) 43 (14.5) 46 (15.5) Anorexia 41 (13.8) 31 (10.5) Seizures 10 (3.4) 7 (2.4) Hepatopathy 8 (2.7) 3 (1.0) Hypersalivation 7 (2.4) 3 (1.0) Anaphylactoid/Hypersensitivity Reactions 6 (2.0) 4 (1.4) *Some dogs may have experienced more than one adverse reaction or more than one occurrence of the same adverse reaction during the study. Two ProHeart 12 (moxidectin) - treated dogs experienced anaphylactoid/hypersensitivity-related clinical signs within the first 24 hours following the initial treatment. Both dogs responded to symptomatic treatment. One dog experienced hives and facial swelling that resolved in 24 hours. The second dog experienced redness and swelling of the face and paws, followed by vomiting, polydipsia, and elevated heart rate and was treated symptomatically. Signs resolved within 4 days. One dog was pre-treated before the second injection of ProHeart 12, and neither dog had a reaction to the second dose 12 months later. One active control-treated dog experienced anaphylactoid/hypersensitivity-related clinical signs within the first 24 hours. The dog was withdrawn from the study prior to the second monthly dose. Mild injection site reactions occurred in six ProHeart 12-treated dogs and were observed from one to seven days post dosing and included warmth, swelling and pruritus. One of these cases included mild pruritus at the injection site that resolved spontaneously within 24 hours of administration. In a laboratory effectiveness study, dogs with 4- and 6-month-old heartworm infections administered moxidectin microspheres at a dose of 0.17 mg/kg experienced vomiting, lethargy and bloody diarrhea. These signs were more severe in the dogs with 4-month-old heartworm infections, including one dog that was recumbent and required supportive care, than in the dogs with older (6-month-old) infections. Post-Approval Experience (2018): The following adverse events are based on post-approval adverse drug experience reporting for ProHeart 6. ProHeart 12 and ProHeart 6 are the same formulation, but ProHeart 12 is three times the concentration of ProHeart 6. Not all adverse reactions are reported to FDA/CVM. It is not always possible to reliably estimate the adverse event frequency or establish a causal relationship to product exposure using these data. The following adverse events are listed in decreasing order of frequency by body system. Immune: anaphylaxis and/or anaphylactoid reactions, urticaria, head/facial edema, pruritus, pale mucous membranes, collapse, cardiovascular shock, erythema, immune-mediated hemolytic anemia, immune-mediated thrombocytopenia (signs reflected in other system categories could be related to allergic reactions, i.e. gastrointestinal, dermatologic, and hematologic) Gastrointestinal : vomiting (with or without blood), diarrhea with or without blood, hypersalivation General : depression, lethargy, anorexia, fever, weight loss, weakness Dermatological : injection site pruritus/swelling, erythema multiforme Neurological : seizures, ataxia, trembling, hind limb paresis Hematological : leukocytosis, anemia, thrombocytopenia Respiratory : dyspnea, tachypnea, coughing Hepatic : elevated liver enzymes, hypoproteinemia, hyperbilirubinemia, hepatopathy Urinary : elevated BUN, elevated creatinine, hematuria, polydipsia, polyuria Cardiopulmonary signs such as coughing and dyspnea may occur in heartworm positive dogs. In some cases, death has been reported as an outcome of the adverse events listed above. Foreign market experience with ProHeart 12 includes similar voluntarily reported adverse events, including death, following administration of ProHeart 12. For a copy of the Safety Data Sheet (SDS) or to report suspected adverse reactions, contact Zoetis at 1-888-963-8471. For additional information about adverse drug experience reporting for animal drugs, contact FDA at 1-888-FDA-VETS or http://www.fda.gov/AnimalVeterinary/SafetyHealth. Client Information Sheet ProHeart 12 (moxidectin) Review this information with your veterinarian each time your dog receives ProHeart 12. When your veterinarian prescribes medicine for your dog, it’s sometimes hard to remember all the information discussed during the visit. This sheet is provided as a summary, but if you have any additional questions you should speak with your veterinarian. What is ProHeart 12? ProHeart 12 is a medication that prevents heartworm disease in dogs 12 months of age and older. Your veterinarian gives it to your dog via an injection and it protects your dog from developing heartworm disease for 12 full months. ProHeart 12 also treats common hookworm infections your dog may have at the time of injection. What should I discuss with my veterinarian before using ProHeart 12? • General health – ProHeart 12 should only be given to healthy dogs. • Changes in behavior or health, including weight loss. • Allergies – Past or present, uncontrolled allergies, including food, flea or skin allergies. • Past problems with or reactions to vaccines or medications . • Current medications, supplements or special diets, including those you can get without a prescription. What is heartworm disease and how can my dog get it? Heartworm disease is a serious, potentially fatal illness where worms grow in a dog’s heart and lungs. Mosquitoes spread heartworm disease when they bite a dog. A single bite from an infected mosquito can put your dog at risk for developing heartworm disease. What are hookworms and how could my dog get them? Hookworms are common parasites that can live in a dog’s intestines. Your dog can get hookworms by eating hookworm larvae (young hookworms) that may be in the dirt or they can get hookworms through skin contact. What possible ProHeart 12 side effects could happen to my dog? It is important to contact your veterinarian if you observe any signs of illness in your dog. Severe reactions require emergency treatment by your veterinarian. Watch your dog for the following possible signs of illness : • Allergic reactions - Allergic symptoms such as swelling of the face, itching, hives and/or inflamed skin. Allergic reactions may occur when ProHeart 12 is given alone or with vaccines. Some allergic reactions can be severe, such as difficulty breathing or collapse. • Vomiting and/or diarrhea - Either with or without blood. • Seizures • Change in your dog's appetite or activity level Most reactions occur within the first 24 hours of receiving ProHeart 12; severe allergic reactions may occur in the first two hours. IF YOU NOTICE ANY SIGNS OF ILLNESS, OR ANYTHING OUT OF THE ORDINARY AFTER YOUR DOG RECEIVES PROHEART 12, CONTACT YOUR VETERINARIAN IMMEDIATELY. In some cases, these events may be serious and may cause death. If you have any questions about ProHeart 12, talk to your veterinarian. [Veterinarian: Please place contact information below] Practice Name: Vet Name: Phone: To obtain additional information, visit ProHeart12.com or call 1-888-963-8471. Approved by FDA under NADA # 141-519 zoetis Distributed by: Zoetis Inc. Kalamazoo, MI 49007 All trademarks are the property of Zoetis Services LLC or a related company or a licensor unless otherwise noted. © 2019 Zoetis Services LLC. All rights reserved. PHT-00XXX Client Information Sheet

Description

ProHeart 12 (moxidectin) for extended-release injectable suspension consists of two separate vials: one vial contains 10% moxidectin sterile microspheres; and the second vial contains a specifically formulated sterile vehicle for constitution with the microspheres. A clear or translucent appearance of the vehicle is normal. Each mL of constituted drug product contains 10 mg moxidectin, 9% glyceryl tristearate, 2.25% hydroxypropyl methylcellulose, 0.81% sodium chloride, 0.16% methylparaben, 0.02% propylparaben and 0.004% butylated hydroxytoluene. Hydrochloric acid is used to adjust pH. The constituted product may appear as a hazy to milky suspension.

Information for Owners

Always provide Client Information Sheet and review with owners before administering ProHeart 12. Owners should be advised of the potential for adverse reactions, including anaphylaxis, and be informed of the clinical signs associated with drug toxicity (see WARNINGS, ADVERSE REACTIONS and POST-APPROVAL EXPERIENCE sections.) Owners should be advised to contact their veterinarian immediately if signs of toxicity are observed. The vast majority of patients with drug related adverse reactions have recovered when the signs are recognized and veterinary care, if appropriate, is initiated.

Storage

Store the unconstituted product at or below 25°C (77°F). Do not expose to light for extended periods of time. After constitution, the product is stable for 8 weeks stored under refrigeration at 2° to 8°C (36° to 46°F).

Other labels for this ingredient

These labels are also stored for the same active ingredient. They are not identical to the one reprinted above, and each is listed by product and set id rather than merged with it.

• ProHeart ® 6 (moxidectin) For Extended-Release Injectable Suspension for Dogs, Zoetis Inc.. Set id ec3ba375-9519-4a3d-afe3-eda451bb3488.
• Tauramox™ (moxidectin) Injectable Solution for Beef and Nonlactating Dairy Cattle, Norbrook Laboratories Limited. Set id 36feb63e-c146-45ea-b814-45022ae66d15.
• , Elanco US Inc.. Set id 933980d5-8495-4ff3-b543-349b5994626f.
• , Elanco US Inc.. Set id aa2d9a4d-a442-4d1c-a7bd-17b09d8ab718.
• Moxidectin ORAL SHEEP DRENCH ™ (moxidectin), Durvet, Inc.. Set id 99b06ea8-8c54-43f9-b0ca-9e17f75397fb.
• , Bimeda, Inc.. Set id 8eefc52a-6f0f-486f-8a27-94e457a42a06.
• , MWI/VetOne. Set id 15403e7f-e129-4e16-8805-2066c11489e5.
• , Durvet. Set id 9331559a-6ca2-4c41-bc61-5c529492003a.

FDA adverse event reports

The FDA Center for Veterinary Medicine publishes the adverse event reports it receives through openFDA. The counts below are the reports naming moxidectin as an active ingredient for each species this label names, as returned on 2026-09-16, coded by the VeDDRA reaction term the reporter chose. Reactions are counted per report, so one report can appear under several terms.

These are counts, not rates. Reporting is voluntary, the number of animals treated is not known, and a widely used product accumulates reports for that reason alone. A report records that an event followed a dose; it does not establish that the product caused it. The counts say nothing about how one product compares with another.