SwineMate (Altrenogest) Solution for Pigs, slide 1 of 1

SwineMate (Altrenogest) Solution for Pigs, 1000-mL bottle

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SwineMate is a solution used to synchronization estrus in sexually mature gilts that have had at least one estrous cycle to achieve prolonged gestation for 2-3 days, synchronized farrowing and postponement of post-weaning estrus. Provides predictable breeding timetable. Encourages standing heat 4-9 days after completing the treatment.


For synchronization of estrus in sexually mature gilts that have had at least one estrous cycle. Treatment with SwineMate results in estrus (standing heat) 4 to 9 days after completion of the 14-day treatment period.

Possible Side Effects

Underfeeding of SwineMate may lead to the occurrence of cystic follicles. A small percentage (less than 5%) of treated gilts may exhibit estrus (standing heat) during the 14-day treatment period. Gilts nearing estrus at the start of the 14-day treatment period may express estrus early in that period.

Drug & Food Interactions

Do not use in gilts having a previous or current history of uterine inflammation (i.e., acute, subacute or chronic endometritis).


Keep this and all medication out of the reach of children. Avoid skin contact. Wear vinyl, neoprene or nitrile protective gloves when handling this product. Do not use latex gloves. Pregnant women or women who suspect they are pregnant should not handle SwineMate (altrenogest) Solution. Women of childbearing age should exercise extreme caution when handling this product. Accidental absorption could lead to a disruption of the menstrual cycle or prolongation of pregnancy. Wash off accidental spillage on the skin immediately with soap and water.

  1. Prescribing Information

See all items by SwineMate

  • Item Number
  • Generic Name
  • For Use With
  • Restricted Availability
  • Common Brand Name(s)
    SwineMate, Chronomate
  • Administration Form
    Mix in Food
  • Product Form
  • Health Condition
    Estrus Induction
  • Drug Type

Active Ingredients: Altrenogest solution 0.22% (2.2 mg/mL).

Recommended Dosage

While wearing protective gloves, remove shipping cap and seal; replace with enclosed plastic dispensing cap. Remove cover from bottle dispensing tip and connect luer lock syringe (without needle). Draw out appropriate volume of SwineMate solution. (Note: Do not remove syringe while bottle is inverted as spillage may result.) Detach syringe and replace cover on bottle dispensing tip to prevent leakage. Administer 6.8 mL (15 mg altrenogest) per gilts once daily for 14 consecutive days. Treat gilts on an individual animal basis by top-dressing SwineMate on a portion of each gilt's daily feed allowance. To produce the desired synchronization of estrus in a group of gilts, treat all of the gilts daily for the same 14-day period. Excessive use of a syringe may cause the syringe to stick; therefore, replace syringe as necessary.

Storage Instructions

Store at or below room temperature, 77° F. Close tightly. Always wear gloves when handling this medication. When removing a dose, the liquid often drips down the side of the container and should be cleaned up safely. SwineMate is an oily drug, and lots of detergent and water may be required for clean-up.


How is SwineMate useful?

SwineMate is used in gilts to synchronize estrus for planned breeding.

What should I tell my veterinarian to see if this medication can be safely given?

Many things might affect how well this drug will work in your animal. Be sure to discuss the following with your veterinarian so together you can make the best treatment decisions.

  • Other drugs can interact with SwineMate, so be sure to tell your veterinarian and pharmacist what medications (including vitamins, supplements, or herbal therapies) you give your animal, including the amount and time you give each.

  • Tell your veterinarian about any conditions or diseases your animal may have now or has had in the past.

  • If your animal has been treated for the same disease or condition in the past, tell your veterinarian about the treatment and how well it did or didn't work.

  • If your animal is pregnant or nursing, talk to your veterinarian about the risks of using this drug.

  • Tell your veterinarian and pharmacist about any medication side effects (including allergic reactions, lack of appetite, diarrhea, itching, hair loss) your animal has developed in the past.

How long until I will know if this medication is working, and how long will the effects of this medication last?

SwineMate takes several doses before you will see any effect. The medication's full effects may not be evident until your animal has taken it consistently for several weeks. However, you may not see any improvement of clinical signs outwardly, so your veterinarian may need to run further tests to determine if the drug is working appropriately. The effects of this medication are moderate in duration, meaning they may last for a few days.

Can handling this medication be hazardous to me, my family, or other animals?

The manufacturer of SwineMate recommends that certain people must not handle this product:

  • Women who are pregnant or may become pregnant.
  • Anyone with blood clots or a history of blood clots.
  • Anyone with hardening of the arteries or a history of stroke.
  • Women with breast cancer or a history of breast cancer.
  • Women with estrogen dependent cancerous tumors.
  • Women who have had tumors that developed while taking estrogens or oral contraceptives.

If you, or others that may handle this product, fit any of these categories, discuss with your veterinarian whether this drug can be safely used or if other treatments may be better.

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