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What is Sildenafil?

Category: Prescription Drugs

Most popular types: Viagra Revatio Penegra

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Sildenafil is a phosphodiesterase-5 enzyme inhibitor. It is used in the treatment of pulmonary arterial hypertension to improve exercise ability and delay clinical worsening. It is also used in the treatment of erectile dysfunction (ED).

See patients taking Sildenafil

Reported purpose & perceived effectiveness
Purpose Patients Evaluations Perceived Effectiveness
Erectile dysfunction 196 30
Sexual dysfunction 40 18
Idiopathic pulmonary arterial hypertension 34 2
Erectile dysfunction 13 3
Pulmonary hypertension 12 6
Raynaud's disease 5 3

Show all 35 reasons taken

  • Major
  • Moderate
  • Slight
  • None
  • Can't tell
See all 585 patients that have taken Sildenafil

Side effects

Side effects as an overall problem

Side effects as an overall problem
Severity Evaluations Percentage
Severe 3
Moderate 8
Mild 19
None 27

Commonly reported side effects and conditions associated with Sildenafil

Side effect Patients Percentage
Headaches 6
Flushing 3
Nasal congestion 2
Acid reflux 1
Back pain 1
Blurry vision 1

Show all 27 reported side effects

Why patients stopped taking Sildenafil

Multiple reasons could be selected

Reason Patients Percentage
Did not seem to work 17
Expense 16
Other 7
Side effects too severe 5
Doctor's advice 4
Change in health plan coverage 3
Course of treatment ended 3
Personal research 3
See all 47 patients who've stopped taking Sildenafil

Duration

Stopped taking Sildenafil

Duration Patients Percentage
Less than 1 month 5
1 - 6 months 6
6 months - 1 year 6
1 - 2 years 9
2 - 5 years 13
5 - 10 years 6
10 years or more 2
Adherence
Adherence Evaluations Percentage
Always 34
Usually 8
Sometimes 14
Never taken as prescribed 1
Burden
Burden Evaluations Percentage
Very hard to take 3
Somewhat hard to take 8
A little hard to take 12
Not at all hard to take 34
Cost per month
Cost per month Evaluations Percentage
$200+ 5
$100-199 0
$50-99 11
$25-49 13
< $25 7
Not specified 21

What people switch to and from

Patients started taking Sildenafil after stopping:

Treatment Patients Percentage
Tadalafil (Cialis) 3
Alprostadil (Muse) 1
Oxygen therapy 1

Patients stopped taking Sildenafil and switched to:

Treatment Patients Percentage
Tadalafil (Cialis) 15
Alprostadil (Muse) 2
Vardenafil (Levitra) 2
Macitentan (Opsumit) 1
Nifedipine (Nifedical XL) 1

Show all 6 treatments patients report switching to

Last updated:

3 patient evaluations for Sildenafil

Sort by: Most recent

Dec 16, 2014 (Started Sep 15, 2014)

  • Effectiveness
    Slight (for erectile dysfunction)
  • Side effects
    Moderate (low blood pressure)
  • Adherence
    Sometimes
  • Burden
    A little hard to take
Dosage: As needed
Cost: $50-99 monthly

Dec 4, 2014 (Started Sep 15, 2014)

  • Effectiveness
    Slight (for erectile dysfunction)
  • Side effects
    Mild (low blood pressure)
  • Adherence
    Usually
  • Burden
    Not at all hard to take
Dosage: As needed
Cost: $50-99 monthly
  • 0 helpful marks

Dec 15, 2013 (Started Apr 01, 2009)

  • Effectiveness
    Slight (for sexual dysfunction)
  • Side effects
    Mild (tension headache)
  • Adherence
    Always
  • Burden
    Not at all hard to take
Dosage: As needed
Cost: < $25 monthly
  • 0 helpful marks

Sep 26, 2008 (Started Mar 26, 2002)

  • Effectiveness
    Major (for sexual dysfunction)
  • Side effects
    None
  • Adherence
    Always
  • Burden
    Not at all hard to take
Dosage: As needed
Cost: $50-99 monthly
  • 1 helpful mark
Last updated:
Showing 3 of 3 patient evaluations for Sildenafil