What is MDR1?   Its is a gene mutation that does not allow drugs to be cleared out of the brain as it would
          be in the case of a dog that does not carry this mutation.  This gene is involved with the blood-brain
          barrier.   Normally it functions in a protective way to remove drugs and toxins from the brain.
          Dogs without this protective gene may suffer from abnormal nuerological distress that can cause death
          and/or extended hospital treatment.

What are the symptoms? Excessive salivation, blindness, coma, respiratory distress,
         ataxia (the loss of muscle co-ordination) and death.

There is a DNA test available for this mutation.
        It is called the MDR1 Test, and can be done by taking a cheek swab from your dog, at home.
        The cost of this test is $60.00.  Your vet can also do this for you if you give him the information,
        or take the test kit in with you.  The test sample is sent to the university by regular mail.

All Collies do not carry this gene, and some test normal for this condition.

                              Click below to order a test kit & read more information.  The kit is free.
                            
WASHINGTON STATE UNIVERSTITY TEST KIT & ORDER INFORMATION

 As you see below this gene does not affect only Collies, and more breeds and more drugs will
probably be added to this list in the future, and we learn more and more.

Collies, as well as Shetland Sheepdogs, Australian Shepherds, German Shepehrds, Old English Sheepdogs
Border Collies and other breeds, as well as mixes may react to the drugs below.

Problem drugs:

                                      ACEPROMAZINE,  tranquilizer
                                      BUTORPHANOL,  pain reliever
                                      CYCLOSPORIN,  immunosuppressive drug
                                      DIGOXIN,  heart drug
                                      DOXORUBICIN,  cancer drug
                                      IVERMECTIN,  a wormer
                                      LOPERAMIDE - Imodim,  an over-the-counter anti-diarheal
                                      VINBLASTINE,  cancer drug
                                      VINCRISTINE,  cancer drug

Drugs that may be potential problem drugs:
 
                                      DOMPERIDONE
                                      ETOPOSIDE
                                      MITOXATRONE
                                      MORPHINE
                                      ONDANSETRON
                                      PACLITAXEL
                                      QUINIDINE
                                      RIFAMPICIN
You can also
help by reporting
any drug reaction
your dog has,
no matter what
breed, to the
university.

Researchers
suspect that
many other breeds
and many other
drugs will
be added to the
lists as more
research is done.
Drug Sensitivy in Collies
You may want to do on your Collie, whether a
showdog or not, because it will determine if your dog
is sensitive to certain commonly used drugs that are
causing mild to lethal reactions in many dogs today