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

Summary:

Drug interactions are reported among people who take Effexor (venlafaxine hydrochloride) and Dalmane (flurazepam hydrochloride). Common drug interactions include cognitive disorder among females and drug withdrawal syndrome among males.

The phase IV clinical study analyzes what interactions people have when they take Effexor and Dalmane. It is created by eHealthMe based on reports of 82 people who take the same drugs from the FDA, and is updated regularly.

What is Effexor?

Effexor has active ingredients of venlafaxine hydrochloride. It is often used in depression. eHealthMe is studying from 99,493 Effexor users. Check the latest studies of Effexor.

What is Dalmane?

Dalmane has active ingredients of flurazepam hydrochloride. It is often used in insomnia. eHealthMe is studying from 1,269 Dalmane users. Check the latest studies of Dalmane.

On Jul, 19, 2026

82 people who take Effexor and Dalmane together, and have interactions are studied.

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

female:

Cognitive disorder (mental health disorders affects learning, memory, perception, and problem solving)
Connective tissue disorder (any disease that has the connective tissues of the body)
Gait disturbance
Staphylococcal infection (an infection with staphylococcus bacteria)
Alopecia (absence of hair from areas of the body)
Amnesia (deficit in memory caused by brain damage, disease, or psychological trauma)
Balance disorder
Bronchitis (inflammation of the mucous membrane in the bronchial tubes)
Confusional state
Deafness

male:

Drug withdrawal syndrome (interfere with normal social, occupational, or other functioning. are not due to another medical condition, drug use, or discontinuation)
Urinary tract infection
Pneumonia
Pseudomonas infection (pseudomonas infection is caused by a bacterium, pseudomonas aeruginosa)
Suicidal ideation
Weight decreased
Abdominal pain
Bronchitis (inflammation of the mucous membrane in the bronchial tubes)
Hypertension (high blood pressure)
Pyrexia (fever)

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

0-1:

n/a

2-9:

n/a

10-19:

Bone disorder
Bone infection
Infection
Jaw disorder (jaw disease)
Oral soft tissue disorder (oral soft tissue disease)

20-29:

Cholelithiasis (the presence or formation of gallstones in the gallbladder or bile ducts)
Crohn's disease (a condition that causes inflammation of the gastrointestinal tract)
Dehydration (dryness resulting from the removal of water)
Drug withdrawal syndrome (interfere with normal social, occupational, or other functioning. are not due to another medical condition, drug use, or discontinuation)
Hypocalcaemia (levels of calcium in blood serum are abnormally low)
Hypokalaemia (low potassium)
Oedema peripheral (superficial swelling)
Paraplegia (paralysis of the legs and lower body)
Pneumonia
Pseudomonas infection (pseudomonas infection is caused by a bacterium, pseudomonas aeruginosa)

30-39:

Drug withdrawal syndrome (interfere with normal social, occupational, or other functioning. are not due to another medical condition, drug use, or discontinuation)
Formication (a sensation that exactly resembles that of small insects crawling on (or under) the skin)
Choking (mechanical obstruction of the flow of air from the environment into the lungs)
Weight increased
Circulatory collapse
Eosinophil count decreased
Mean cell haemoglobin concentration increased (more concentration of haemoglobin in a given volume of packed red blood cells)
Mean platelet volume increased (more than normal average size of platelet cells in blood)
Mental disorder (a psychological term for a mental or behavioural pattern or anomaly that causes distress or disability)
Monocyte count decreased

40-49:

Amnesia (deficit in memory caused by brain damage, disease, or psychological trauma)
Autoimmune disorder (a condition in which the immune system attacks the body's normal substances and tissue)
Cognitive disorder (mental health disorders affects learning, memory, perception, and problem solving)
Connective tissue disorder (any disease that has the connective tissues of the body)
Pain
Alopecia (absence of hair from areas of the body)
Balance disorder
Chest pain
Confusional state
Deafness

50-59:

Hypertensive heart disease
Hypocalcaemia (levels of calcium in blood serum are abnormally low)
Ileus paralytic (obstruction of the intestine due to paralysis of the intestinal muscles)
Impaired healing
Increased appetite
Influenza like illness
Injury
International normalised ratio decreased
Intervertebral disc protrusion (spinal disc protrusion)
Irritability

60+:

Abdominal pain
Back pain
Fatigue (feeling of tiredness)
Nasopharyngitis (inflammation of the nasopharynx)
Neuroleptic malignant syndrome (a life-threatening neurological disorder most often caused by an adverse reaction to neuroleptic or antipsychotic agents)
Pain
Respiratory distress (difficulty in breathing)
Rigors (an episode of shaking or exaggerated shivering)
Somnolence (a state of near-sleep, a strong desire for sleep)
Throat irritation

What are the existing conditions these people have? *

Hepatitis C: 9 people, 10.98%
Sleep Disorder: 6 people, 7.32%
Bipolar Disorder (mood disorder): 6 people, 7.32%
Pain: 5 people, 6.10%
High Blood Pressure: 5 people, 6.10%

* Approximation only. Some reports may have incomplete information.

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