Dr. Ralph Warsinsky wrote:
> since I´m new on the mailing list, could anyone please forward the
> article posted recently to me too.
June 9, 1999
New Drugs Blamed in 'Sleep Attacks'
By LAURAN NEERGAARD AP Medical Writer
WASHINGTON (AP) - Two new drugs for Parkinson's disease may suddenly put
patients to sleep, a dangerous narcolepsy-like side effect termed
``sleep attack'' that has caused at least eight people to have car
wrecks, doctors warned Wednesday.
The Food and Drug Administration is talking with the manufacturers about
whether the drugs need additional warning labels.
Dr. Steven Frucht of Columbia-Presbyterian Medical Center in New York,
who reported the eight cases in the journal Neurology, said Parkinson's
patients should not overreact to the warning and stop taking the drugs,
which can be very helpful at treating Parkinson's symptoms.
``You have to discuss this possibility frankly with patients before
starting this medication,'' advised Frucht, who still prescribes the
medicines. Patients, he added, should talk with their doctors whether
they feel sedated or ever have suffered a sleep attack.
Eight men taking the drug Mirapex, known chemically as pramipexole,
suffered sleep attacks while driving that resulted in accidents,
although none of the patients was injured, Frucht reports.
Four also experienced sleep attacks during business meetings and phone
calls.
Six stopped taking Mirapex and two others reduced the dose, and the
sleep attacks stopped.
But one former Mirapex patient then switched to a second Parkinson's
drug called Requip, known chemically as ropinirole, and suffered another
sleep attack while driving.
The effect appears rare: Over 100,000 Americans take these drugs, and
the FDA said it knew of no additional cases.
But ``unless you ask, many patients won't report this,'' Frucht said.
When the FDA approved Mirapex and Requip in 1997, it noted on the drugs'
labels that they occasionally cause somnolence, and thus driving is not
a good idea until the patient has taken the medicines long enough to
tell if they are susceptible.
But somnolence - that drowsy feeling that even over-the-counter drugs
like antihistamines often cause - is very different from a sleep attack,
said Frucht, describing the attacks as overwhelming and irresistible
sleepiness that comes on without warning.
How long a patient must take the drugs to see if they will be affected
is questionable, he added. Frucht noted that the eight patients who had
car wrecks had taken the medicines anywhere from one month to 14 months
before the sleep attack.
``A sleep attack is for all intents and purposes meaningless if you're
sitting in front of the TV,'' Frucht said. ``But they're driving on the
highway. The next thing they knew they'd hit the car next to them, or
the passenger screamed at them that they're going off the road.''
Frucht and colleagues at three Parkinson's centers alerted the drugs'
manufacturers - Pharmacia & UpJohn for Mirapex and SmithKline Beecham
for Requip - to the eight patients they treated.
Pharmacia & UpJohn said it is investigating whether patients just were
drowsy from the drugs and driving made it worse, or if they indeed
experienced the abrupt attack Frucht described. If so, the next question
is whether patients took additional medications that interacted to cause
the sleep attack.
Between 500,000 and 1.5 million Americans have Parkinson's, which causes
progressive muscle rigidity, tremors and difficulty moving as they
slowly lose a vital brain chemical called dopamine. Mirapex and Requip
work by mimicking dopamine.
Copyright © 1999 The Associated Press.
--
Judith Richards, London, Ontario, Canada
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