What is PK Merz?

Category: Prescription Drugs


Generic name: Amantadine

PK-Merz® is a brand name for the drug amantadine, an antiviral medication. It is used to treat and prevent certain strains of influenza A. It is also used to treat Parkinson's Disease and "Parkinson-like" symptoms such as stiffness and shaking that may be that may be caused by certain drugs.

Reported purpose & perceived effectiveness
Purpose Patients Evaluations Perceived Effectiveness
Parkinson's Disease 6 2
Improve mobility 3 0
Numbness in fingers 1 1
Walking problems 1 0

  • Major
  • Moderate
  • Slight
  • None
  • Can't tell

Side effects

Side effects as an overall problem

Side effects as an overall problem
Severity Evaluations
Severe 0
Moderate 0
Mild 0
None 3

Commonly reported side effects and conditions associated with PK Merz

Side effect Patients


Based on patients currently taking PK Merz

Dosage Patients
200 mg daily 1

Why patients stopped taking PK Merz

Multiple reasons could be selected

Reason Patients
Did not seem to work 2
Change in health plan coverage 1
Other 1
See all 3 patients who’ve stopped taking PK Merz


Currently taking PK Merz

Duration Patients
5 - 10 years 1

Stopped taking PK Merz

Duration Patients
6 months - 1 year 2
1 - 2 years 1
Adherence Evaluations
Always 1
Usually 2
Sometimes 0
Never taken as prescribed 0
Burden Evaluations
Very hard to take 0
Somewhat hard to take 0
A little hard to take 0
Not at all hard to take 3
Cost per month
Cost per month Evaluations
$200+ 0
$100-199 0
$50-99 0
$25-49 0
< $25 2
Not specified 1

What people switch to and from

Patients stopped taking PK Merz and switched to:

Treatment Patients
Amantadine (Symmetrel) 1
Last updated:
There are no evaluations for PK Merz.