Equine Altrenogest (Rx)
TRADE NAMES:Altresyn (altrenogest) Solution 0.22%
This drug is a synthetic hormone that is used in mares to manage their estrus cycle. It is available as an oral solution.
WHAT IS THIS DRUG?
- A synthetic progesterone hormone
- Given by mouth
REASONS FOR PRESCRIBING:
- Used to establish a normal estrus cycle during the summer breeding season
- Used to control the start of the estrus cycle allowing for predictability and scheduled breedings
- Used to maintain pregnancy in certain mares that are progesterone deficient
Altrenogest should be given according to your veterinarian’s instructions. Read and follow the prescription label carefully.
Give the exact amount prescribed and only as often as directed.
Give this medication for as long as your veterinarian directs. Do not skip doses or stop giving the medication without consulting your veterinarian.
Baseline blood work may be recommended to assess your mare’s general health before starting this medication.
This medication is given orally, either directly on the base of the tongue or mixed into the mare’s daily grain ration.
Ideally, give this medication at the same time(s) daily.
WHAT IF A DOSE IS MISSED?
If a dose is missed, give it as soon as you can. If it is time already for the next dose, skip the missed dose and go back to the normal schedule. Do not give two doses at the same time.
STORAGE AND WARNINGS:
Altrenogest should be stored in a childproof container in a cool, dry place at room temperature away from heat and direct sunlight.
This medication can be easily absorbed through skin, impermeable gloves are recommended.
In case of accidental skin exposure, wash immediately with soap and water.
In case of accidental eye exposure, flush immediately and seek medical attention.
Call your physician immediately if you accidentally ingest this product.
Keep this and all medication out of reach of children and pets.
Altrenogest should not be handled by pregnant women or women trying to become pregnant.
Altrenogest should not be handled by individuals with clotting disorders, cardiovascular or liver disease, certain cancers or undiagnosed vaginal bleeding.
Women of child-bearing age should use extreme caution when handling this medication due to effects on the menstrual cycle.
POTENTIAL SIDE EFFECTS:
- Adverse reactions are uncommon at the recommended doses
- This medication may cause mild changes in blood levels of calcium, potassium and liver enzymes
- This medication may exacerbate uterine infections in mares with pre-existing uterine inflammation
- All medication has the potential to cause an immediate allergic or anaphylactic reaction. Affected animals may have a swelling, hives, changes in respiration, and display signs of agitation. This can be a severe and life threatening reaction, immediate veterinary care may be required.
- Notify your veterinarian immediately if your horse experiences any adverse reactions to this medication
CAN THIS DRUG BE GIVEN WITH OTHER DRUGS?
- Avoid concurrent use with rifampin
- Drugs other than those listed may also interact with Altrenogest
- Do not give new food or medications without first talking to your veterinarian
- If your horse experiences any unusual reactions when taking multiple medications, contact your veterinarian
Contact your veterinarian immediately if your horse receives more than the prescribed amount.
WHAT ELSE SHOULD I KNOW?
Notify your veterinarian if your horse’s condition does not improve or worsens despite this treatment.
This product should not be used in horses intended for human consumption.
Check with the appropriate regulatory body regarding the use in competition horses.
As with all prescribed medication, Altrenogest should only be given to the horse for which it was prescribed.
It should be given only for the condition for which it was prescribed.
This is just a summary of information about Altrenogest. If you have any questions or concerns about this product or for the condition it was prescribed, please contact your veterinarian.