Mellaril and Fentanyl drug interactions - a phase IV clinical study of FDA data

Summary:

Drug interactions are reported among people who take Mellaril (thioridazine hydrochloride) and Fentanyl (fentanyl citrate). Common drug interactions include drug hypersensitivity among females and anxiety among males.

The phase IV clinical study analyzes what interactions people have when they take Mellaril and Fentanyl. It is created by eHealthMe based on reports of 12 people who take the same drugs from the FDA, and is updated regularly.

What is Mellaril?

Mellaril has active ingredients of thioridazine hydrochloride. eHealthMe is studying from 1,516 Mellaril users. Check the latest studies of Mellaril.

What is Fentanyl?

Fentanyl has active ingredients of fentanyl citrate. It is often used in pain. eHealthMe is studying from 73,301 Fentanyl users. Check the latest studies of Fentanyl.

On Jul, 12, 2026

12 people who take Mellaril and Fentanyl together, and have interactions are studied.

Mellaril and Fentanyl drug interactions.

What are the common drug interactions of Mellaril and Fentanyl, by gender? *:

female:

Drug hypersensitivity
Anaphylactic reaction (serious allergic reaction)
Blood creatinine decreased
Blood urea decreased
Bronchospasm (spasm of bronchial smooth muscle producing narrowing of the bronchi)
Flushing (the warm, red condition of human skin)
Hypotension (abnormally low blood pressure)
Oliguria (not enough urine)
Rash generalised (rash on most of body parts)
Tachycardia (a heart rate that exceeds the range of 100 beats/min)

male:

Anxiety
Chest pain
Arthralgia (joint pain)
Blood oestrogen increased
Bone disorder
Constipation
Death
Decreased interest
Depression
Emotional distress

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

0-1:

n/a

2-9:

n/a

10-19:

Anaphylactic reaction (serious allergic reaction)
Blood creatinine decreased
Blood urea decreased
Bronchospasm (spasm of bronchial smooth muscle producing narrowing of the bronchi)
Flushing (the warm, red condition of human skin)
Hypotension (abnormally low blood pressure)
Oliguria (not enough urine)
Rash generalised (rash on most of body parts)
Tachycardia (a heart rate that exceeds the range of 100 beats/min)

20-29:

n/a

30-39:

n/a

40-49:

n/a

50-59:

Anxiety
Emotional distress
Gastrooesophageal reflux disease (stomach contents (food or liquid) leak backwards from the stomach into the oesophagus)
General physical health deterioration (weak health status)
Gingival disorder (gum disease)
Hallucination, visual (seeing things that aren't there)
Hypoaesthesia (reduced sense of touch or sensation)
Impaired healing
Jaw disorder (jaw disease)
Metastases to bone (cancer spreads to bone)

60+:

Drug hypersensitivity

What are the existing conditions these people have? *

Stress And Anxiety: 6 people, 50.00%
Panic Disorder: 6 people, 50.00%
Gastric Ulcer (stomach ulcer): 6 people, 50.00%
Nausea (feeling of having an urge to vomit): 5 people, 41.67%
Prostate Cancer: 3 people, 25.00%
Metastases To Bone (cancer spreads to bone): 3 people, 25.00%
Insomnia (sleeplessness): 2 people, 16.67%

* Approximation only. Some reports may have incomplete information.

Do you take Mellaril and Fentanyl?

- Personalize this study to your gender, age, symptoms and drugs
- Predict drug outcomes for up to one year with AI
- Get an AI agent to monitor your drugs continuously