Dog - Control of Oestrus (Heat)

Why has my veterinary surgeon prescribed this medicine?

Several products are available for the prevention or postponement of oestrus (heat, seasons) in bitches.

Hormonal control of oestrus is not recommended before the first season, or in bitches with a history of vaginal discharge, false pregnancy, or irregular heat periods.

It is important that your pet should have a normal oestrus every 18 to 24 months. It is often difficult to predict when your pet will come into oestrus after the medication is stopped. Continual hormonal control of oestrus may cause side effects in your pet. If your pet is not intended for breeding, think about having your pet spayed (sterilised, neutered).

How does this medicine work?

Progestogens (a type of hormone) exert a negative feedback on the hypothalamic-pituitary axis in the brain, thereby suppressing the secretion of gonadotrophins (from the brain) and cyclical ovarian activity, which normally results in oestrus and ovulation.

How do I give this medication?

• Depending on the medication, your veterinary surgeon will administer this medicine by injection to your pet or the medication can be given by mouth.
• A course of treatment will be required.

How do I store this medicine?

• Tablets should be stored out of reach of children, in a cool, dry place at room temperature. Do not store tablets in the bathroom, near the kitchen sink or in damp places.

Potential side effects

• Tell your veterinary surgeon if your pet is diabetic.
• Your pet may experience irritation at the site of the injection and there may be a change of coat colour at the site of injection.
• Potential side effects with these types of medicines include mammary changes, uterine infection (pyometra), increased appetite, increased thirst, increased urination, personality changes (increased libido), and changes in hair colour. If these effects are seen, contact your veterinary surgeon.
• Your pet may have abnormal oestrus cycles or come into season earlier than expected after the medication is stopped.
• Other side effects may occur. If the pet experiences anything unusual, contact your veterinary surgeon.

Possible drug interactions

• Make sure to tell your veterinary surgeon what other medication you are giving to your pet.
• Contact your veterinary surgeon if your pet experiences any unusual reactions when different medications are given together.