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A Phase I Dose Escalation and Food Effect Study of Isotretinoin

A Phase I Study of Isotretinoin Capsules in Japanese Healthy Adult Male Subjects. (Dose Escalation and Food Effect Studies)

Status
Active, not recruiting
Phases
Phase 1
Study type
Interventional
Source
JPRN
Registry ID
JPRN-jRCT2071220075
Enrollment
36
Registered
2022-11-25
Start date
2022-11-28
Completion date
Unknown
Last updated
2026-06-29

For informational purposes only — not medical advice. Sourced from public registries and may not reflect the latest updates. Terms

Conditions

Severe acne vulgaris

Interventions

[Part 1 (dose escalation)] Single oral administration of Isotretinoin capsule (16mg, 32mg, or 64mg) under fasted conditions as below. Group A : Isotretinoin capsule 16mg 1 capsule or placebo 1 capsule

Sponsors

Toida Tsuneyuki
Lead Sponsor

Eligibility

Sex/Gender
Male

Inclusion criteria

Inclusion criteria: -Japanese healthy male adults aged 18 to 44 years or younger -Body weight: 55 kg or greater and less than75 kg -Body mass index (BMI): 18.5 kg/m2 or greater and less than 25 kg/m2 -Agreed to implement the contraceptive method described in protocol until 1 month after informed consent is obtained and administration of the investigational product (for part 2, administration in period 2)

Exclusion criteria

Exclusion criteria: -History of allergy or hypersensitivity to isotretinoin, other retinoids or vitamin A, or a history of drug hypersensitivity or intolerance determined by the investigator to be potentially compromising subject or study safety. -Significant history (person or family) or current medical history of chronic infection, organ damage or organ dysfunction, particularly cardiovascular disorder (hypertension, etc.), asthma, diabetes mellitus, bone loss (osteoporosis) or bone fragility, anorexia nervosa, liver disorder, or renal disorder. -Judged by the investigator to have a history of clinically significant gastrointestinal disease, inflammatory bowel disease, or current disease, or a history of malabsorption within the past year. -Concurrent, history, or family history of a psychiatric disorder (depression, psychosis, suicidal ideation, etc.). -Current history of medical conditions requiring regular treatment with prescription drugs.

Design outcomes

Primary

MeasureTime frame
[Part 1 (dose escalation)] Pharmacokinetics:Plasma levels of unchanged isotretinoin and three major metabolites and pharmacokinetic parameters of unchanged isotretinoin and major metabolites Safety :Adverse events, laboratory values, vital signs, and 12-lead ECG [Part 2 (food effect)] Pharmacokinetics:Plasma levels of unchanged isotretinoin and three major metabolites after and after fasting, and pharmacokinetic parameters of unchanged isotretinoin and major metabolites Safety :Adverse events, laboratory values, vital signs, and 12-lead ECG

Contacts

Public ContactTomoe Yamanaka

Sun Pharma Japan Ltd.

JPS.clinicaltrial@sunpharma.com+81-3-5719-6663

Outcome results

None listed

Source: JPRN (via WHO ICTRP) · Data processed: Jul 3, 2026