Vistaril and Tryptophan drug interactions - a phase IV clinical study of FDA data

Summary:

Drug interactions are reported among people who take Vistaril (hydroxyzine hydrochloride) and Tryptophan (l - tryptophan). Common drug interactions include cataract among females and decreased appetite among males.

The phase IV clinical study analyzes what interactions people have when they take Vistaril and Tryptophan. 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 Vistaril?

Vistaril has active ingredients of hydroxyzine hydrochloride. It is often used in stress and anxiety. eHealthMe is studying from 9,565 Vistaril users. Check the latest studies of Vistaril.

What is Tryptophan?

Tryptophan has active ingredients of l - tryptophan. eHealthMe is studying from 700 Tryptophan users. Check the latest studies of Tryptophan.

eHealthMe: drug outcomes in the real world

eHealthMe runs one of the largest post-marketing drug safety studies in the world. We study millions of patients and 5,000 more each day. Our data-driven phase IV clinical trials have been referenced on 800+ peer-reviewed medical publications including The Lancet, Mayo Clinic Proceedings, and Nature. Tools to study our phase IV findings are available to the public, anonymous and free >>>.

On Aug, 28, 2026

12 people who take Vistaril and Tryptophan together, and have interactions are studied.

Vistaril and Tryptophan drug interactions.

What are the common drug interactions of Vistaril and Tryptophan, by gender? *:

female:

Cataract (clouding of the lens inside the eye)
Blood pressure increased
Drug ineffective
Dyspepsia (indigestion)
Headache (pain in head)
Osteomyelitis (infection of bone)
Pharyngitis streptococcal (inflammation of the pharynx caused by infection from. streptococcus)
Withdrawal syndrome (a discontinuation syndrome is a set of symptoms occurred due to discontinuation of substance)
Constipation
Dyspnoea (difficult or laboured respiration)

male:

Decreased appetite
Ear infection
Staphylococcal infection (an infection with staphylococcus bacteria)
Ear infection fungal
Infusion site bruising
Infusion site swelling
Injection site vesicles (fluid- or air-filled cavity or sac at injection site)
Sinusitis (inflammation of sinus)
Sinusitis bacterial (bacterial infection of sinus)
Weight decreased

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

0-1:

n/a

2-9:

n/a

10-19:

n/a

20-29:

Decreased appetite
Ear infection
Ear infection fungal
Infusion site bruising
Infusion site swelling
Injection site vesicles (fluid- or air-filled cavity or sac at injection site)
Sinusitis (inflammation of sinus)
Sinusitis bacterial (bacterial infection of sinus)
Weight decreased
White blood cell count decreased

30-39:

n/a

40-49:

n/a

50-59:

Irritability
Quality of life decreased
Impaired work ability

60+:

Blood pressure increased
Cataract (clouding of the lens inside the eye)
Drug ineffective
Dyspepsia (indigestion)
Headache (pain in head)
Pharyngitis streptococcal (inflammation of the pharynx caused by infection from. streptococcus)
Withdrawal syndrome (a discontinuation syndrome is a set of symptoms occurred due to discontinuation of substance)
Constipation
Iodine allergy

What are the existing conditions these people have? *

Narcolepsy (brain's inability to regulate sleep-wake cycles normally): 6 people, 50.00%
Fibromyalgia (a long-term condition which causes pain all over the body): 3 people, 25.00%
Immune System Disorder: 2 people, 16.67%
Sleep Disorder: 1 person, 8.33%

* Approximation only. Some reports may have incomplete information.

Do you take Vistaril and Tryptophan?

- 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