This Alzheimer’S Drug Lead To Serious Side Effects That May Surprise You

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New warnings have been added to the prescribing information for the Alzheimer’s drug Aricept (donepezil) advising of the risk of two rare but potentially serious conditions: muscle breakdown (rhabdomyolysis) and a neurological disorder called neuroleptic malignant syndrome (NMS).

Donepezil is a prescription Alzheimer’S Drug  used to treat the symptoms of mild, moderate and severe dementia related to Alzheimer’s disease. It is available under the brand names Aricept and Aricept RDT (Rapidly Disintegrating Tablet), as well as generic equivalents.

Rhabdomyolysis Alzheimer’S Drug is a rare condition involving the breakdown of muscle tissue. Rhabdomyolysis can cause serious and sometimes fatal abnormal heart rhythms, kidney damage and kidney failure, but is generally treatable if recognized promptly. NMS is a very rare life-threatening disorder characterized by a chemical imbalance that affects the nervous, muscular and cardiovascular systems. The muscular effects of NMS can sometimes lead to rhabdomyolysis.

The prescribing information (product monograph) for Aricept and Aricept RDT has been updated with this important safety information. Manufacturers of generic donepezil products will also update their product information. In addition, Health Canada has published a Summary Safety Review with more information on its review.

What you should do:

  • If symptoms of rhabdomyolysis or NMS are noticed, donepezil should be stopped immediately and a doctor or a pharmacist should be contacted right away. Symptoms of rhabdomyolysis include a combination of fever, muscle or joint pain, weakness, nausea, and dark (tea-like) urine. Symptoms of NMS include high fever, muscle stiffness or rigidity, mental changes including delirium and agitation, and irregular heartbeat and pulse.

Additional information for health professionals:

  • efore prescribing donepezil, Alzheimer’S Drug health professionals should assess patients for risk factors for rhabdomyolysis such as: muscular disorders, uncontrolled hypothyroidism, liver or kidney damage, or if the patient is taking other medications known to cause rhabdomyolysis, Alzheimer’S Drug including: statins (used to lower cholesterol), antipsychotics, and certain types of antidepressants known as SSRIs and SNRIs (selective serotonin reuptake inhibitors and serotonin norepinephrine reuptake inhibitors).
  • Donepezil therapy should be stopped if blood tests show high levels of the chemical creatine phosphokinase (CPK), and/or if NMS and/or rhabdomyolysis is diagnosed.

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