Effexor xr and Questran drug interactions - a phase IV clinical study of FDA data

Summary:

Drug interactions are reported among people who take Effexor xr (venlafaxine hydrochloride) and Questran (cholestyramine). Common drug interactions include rash among females and depressed level of consciousness among males.

The phase IV clinical study analyzes what interactions people have when they take Effexor xr and Questran. It is created by eHealthMe based on reports of 26 people who take the same drugs from the FDA, and is updated regularly.

What is Effexor xr?

Effexor xr has active ingredients of venlafaxine hydrochloride. It is often used in depression. eHealthMe is studying from 35,233 Effexor xr users. Check the latest studies of Effexor xr.

What is Questran?

Questran has active ingredients of cholestyramine. It is often used in diarrhea. eHealthMe is studying from 4,490 Questran users. Check the latest studies of Questran.

On Jul, 24, 2026

26 people who take Effexor xr and Questran together, and have interactions are studied.

Effexor xr and Questran drug interactions.

What are the common drug interactions of Effexor Xr and Questran, by gender? *:

female:

Rash
Pneumonia
Cardiac arrest
Contusion (a type of hematoma of tissue in which capillaries)
Drug dependence
Hepatic fibrosis (scarring process that represents the liver's response to injury)
Pain
Pyrexia (fever)
Coronary artery atherosclerosis (life-threatening blockages in the arteries of your heart)
Hepatic steatosis (fatty liver disease)

male:

Depressed level of consciousness
Abdominal discomfort
Pruritus (severe itching of the skin)
Vomiting
Abnormal behaviour
Asthenia (weakness)
Fall
Fatigue (feeling of tiredness)
Gastroenteritis (inflammation of stomach and intestine)
Hyponatraemia (abnormally low level of sodium in the blood; associated with dehydration)

What are the common drug interactions of Effexor Xr and Questran, by age (0-1 to 60+)? *:

0-1:

n/a

2-9:

n/a

10-19:

n/a

20-29:

Suicidal ideation
Migraine (headache)
Sexual dysfunction (difficulty experienced by an individual or a couple during any stage of a normal sexual activity)

30-39:

n/a

40-49:

n/a

50-59:

Cardiac arrest
Contusion (a type of hematoma of tissue in which capillaries)
Drug dependence
Hepatic fibrosis (scarring process that represents the liver's response to injury)
Pain
Pneumonia
Pyrexia (fever)
Rash
Coronary artery atherosclerosis (life-threatening blockages in the arteries of your heart)
Hepatic steatosis (fatty liver disease)

60+:

Blood pressure increased
Cataract (clouding of the lens inside the eye)
Disease progression
Dysarthria (speech disorder)
Fall
Gastroenteritis (inflammation of stomach and intestine)
Gastrointestinal disorder (functional problems of gastrointestinal tract)
Haemoglobin decreased
Haemorrhoids (a swollen vein or group of veins in the region of the anus)
Hemiparesis (weakness on one side of the body)

What are the existing conditions these people have? *

Narcolepsy (brain's inability to regulate sleep-wake cycles normally): 5 people, 19.23%
Multiple Myeloma (cancer of the plasma cells): 4 people, 15.38%
Cataplexy (loss of muscle tone accompanied by full conscious awareness): 4 people, 15.38%
Pain: 2 people, 7.69%

* Approximation only. Some reports may have incomplete information.

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