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).

Reported purpose & perceived effectiveness
Purpose Patients Evaluations Perceived Effectiveness
Erectile dysfunction 47 27
Sexual dysfunction 31 16
Erectile dysfunction 11 2
Pulmonary hypertension 11 4
Idiopathic pulmonary arterial hypertension 9 0
Impotence 3 0

Show all 33 reasons taken


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

Side effects

Side effects as an overall problem

Side effects as an overall problem
Severity Evaluations
Severe 3
Moderate 7
Mild 21
None 18

Commonly reported side effects and conditions associated with Sildenafil

Side effect Patients
Headaches 7
Flushing 4
Nasal congestion 2
Acid reflux 1
Back pain 1
Blurry vision 1

Show all 28 reported side effects

Dosages

Based on patients currently taking Sildenafil

Dosage Patients
100mg as needed 5
50mg as needed 5
25mg as needed 4
20 mg three times daily 2
25 mg three times daily 2
100 mg daily 1
40 mg three times daily 1
25 mg five times daily 1
60 mg three times daily 1
20mg as needed 1

Why patients stopped taking Sildenafil

Multiple reasons could be selected

Reason Patients
Did not seem to work 14
Expense 12
Other 6
Doctor's advice 4
Change in health plan coverage 3
Course of treatment ended 3
Side effects too severe 3
Personal research 2
See all 40 patients who've stopped taking Sildenafil

Duration

Currently taking Sildenafil

Duration Patients
1 - 6 months 1
6 months - 1 year 1
1 - 2 years 5
2 - 5 years 3
5 - 10 years 9
10 years or more 4

Stopped taking Sildenafil

Duration Patients
Less than 1 month 5
1 - 6 months 3
6 months - 1 year 5
1 - 2 years 9
2 - 5 years 12
5 - 10 years 5
10 years or more 1
Adherence
Adherence Evaluations
Always 29
Usually 7
Sometimes 13
Never taken as prescribed 0
Burden
Burden Evaluations
Very hard to take 3
Somewhat hard to take 7
A little hard to take 11
Not at all hard to take 28
Cost per month
Cost per month Evaluations
$200+ 2
$100-199 0
$50-99 14
$25-49 11
< $25 7
Not specified 15

What people switch to and from

Patients started taking Sildenafil after stopping:

Treatment Patients
Alprostadil (Edex) 1
Oxygen therapy (Homozon Oxygen Therapy) 1
Tadalafil (Cialis) 1

Patients stopped taking Sildenafil and switched to:

Treatment Patients
Tadalafil (Cialis) 6
Vardenafil (Levitra) 2
Last updated:

3 patient evaluations for Sildenafil

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