Effexor and Weakness - from FDA reports

Weakness 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 Xanax, and have Pain. This study is created by eHealthMe based on reports of 74,228 people who have side effects when taking Effexor from FDA, and is updated regularly.

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On Oct, 13, 2018

74,228 people reported to have side effects when taking Effexor.
Among them, 3,723 people (5.02%) have Weakness

Number of reports submitted per year:

Could Effexor cause Weakness?

Time on Effexor when people have Weakness *:

Gender of people who have Weakness when taking Effexor *:

  • female: 74.02 %
  • male: 25.98 %

Age of people who have Weakness when taking Effexor *:

Top conditions involved for these people *:

  1. Pain: 279 people, 7.49%
  2. Multiple Sclerosis (a nervous system disease that affects your brain and spinal cord. it damages the myelin sheath): 195 people, 5.24%
  3. High Blood Pressure: 174 people, 4.67%
  4. Osteoporosis (bones weak and more likely to break): 161 people, 4.32%
  5. High Blood Cholesterol: 130 people, 3.49%

Click here to view more results or personalize the results to your gender and age

Top co-used drugs for these people *:

  1. Xanax: 389 people, 10.45%
  2. Ambien: 387 people, 10.39%
  3. Zometa: 378 people, 10.15%
  4. Neurontin: 376 people, 10.10%
  5. Synthroid: 340 people, 9.13%

Click here to view more results or personalize the results to your gender and age

Top other side effects for these people *:

  1. Fatigue (feeling of tiredness): 1,299 people, 34.89%
  2. Nausea (feeling of having an urge to vomit): 915 people, 24.58%
  3. Dizziness: 825 people, 22.16%
  4. Pain: 824 people, 22.13%
  5. Headache (pain in head): 806 people, 21.65%

Click here to view more results or personalize the results to your gender and age

* Approximation only. Some reports may have incomplete information.

FDA reports used in this study

Do you have Weakness while taking Effexor?

You are not alone:

Related studies


Effexor has active ingredients of venlafaxine hydrochloride. It is often used in depression. (latest outcomes from Effexor 80,229 users)


Weakness has been reported by people with multiple sclerosis, high blood pressure, high blood cholesterol, rheumatoid arthritis, osteoporosis (latest reports from 349,895 Weakness patients).

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What would happen?

Predict new side effects and undetected conditions when you take Effexor and have Weakness

Recent updates

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NOTE: The study is based on active ingredients and brand name. Other drugs that have the same active ingredients (e.g. generic drugs) are NOT considered.

WARNING: Please DO NOT STOP MEDICATIONS without first consulting a physician since doing so could be hazardous to your health.

DISCLAIMER: All material available on eHealthMe.com is for informational purposes only, and is not a substitute for medical advice, diagnosis, or treatment provided by a qualified healthcare provider. All information is observation-only, and has not been supported by scientific studies or clinical trials unless otherwise stated. Different individuals may respond to medication in different ways. Every effort has been made to ensure that all information is accurate, up-to-date, and complete, but no guarantee is made to that effect. The use of the eHealthMe site and its content is at your own risk.

You may report adverse side effects to the FDA at http://www.fda.gov/medwatch/ or 1-800-FDA-1088 (1-800-332-1088).

If you use this eHealthMe study on publication, please acknowledge it with a citation: study title, URL, accessed date.

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