Review: could Effexor cause Syncope?


Syncope is found among people who take Effexor, especially for people who are female, 60+ old , have been taking the drug for < 1 month, also take medication Zometa, and have Depression . We study 42,429 people who have side effects while taking Effexor from FDA and social media. Among them, 711 have Syncope. Find out below who they are, when they have Syncope and more.

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Effexor has active ingredients of venlafaxine hydrochloride. It is often used in depression. (latest outcomes from Effexor 70,563 users)


Syncope (loss of consciousness with an inability to maintain postural tone) has been reported by people with high blood pressure, depression, multiple sclerosis, osteoporosis, primary pulmonary hypertension (latest reports from 69,934 Syncope patients).

On Nov, 12, 2016

42,429 people reported to have side effects when taking Effexor.
Among them, 711 people (1.68%) have Syncope

Number of reports submitted per year:

Could Effexor cause Syncope?

Time on Effexor when people have Syncope *:

  • < 1 month: 53.06 %
  • 1 - 6 months: 10.2 %
  • 6 - 12 months: 6.12 %
  • 1 - 2 years: 4.08 %
  • 2 - 5 years: 4.08 %
  • 5 - 10 years: 18.37 %
  • 10+ years: 2.04 %

Gender of people who have Syncope when taking Effexor *:

  • female: 69.05 %
  • male: 30.95 %

Age of people who have Syncope when taking Effexor *:

  • 0-1: 0.16 %
  • 2-9: 0.0 %
  • 10-19: 2.74 %
  • 20-29: 9.03 %
  • 30-39: 9.35 %
  • 40-49: 21.77 %
  • 50-59: 24.52 %
  • 60+: 32.42 %

Severity of Syncope **:

  • least: 33.33 %
  • moderate: 0.0 %
  • severe: 33.33 %
  • most severe: 33.33 %

How people recovered from Syncope **:

  • while on drug: 0.0 %
  • after off the drug: 0.0 %
  • not yet: 100 %

Top co-used drugs for these people *:

  • Zometa (161 people, 22.64%)
  • Lasix (123 people, 17.30%)
  • Ambien (113 people, 15.89%)
  • Xanax (109 people, 15.33%)
  • Coumadin (101 people, 14.21%)

Forecasts by (We will alert you to new symptoms or undetected conditions when you take Effexor, learn more)


* Approximation only. Some reports may have incomplete information.

** Reports from social media are used.

How to use the study: print a copy of the study and bring it to your health teams to ensure drug risks and benefits are fully discussed and understood.

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