Evidence map›Paper›PMID 34676332›Full record

ArticleMedical cannabis and cannabinoids2019

Development of a Novel Nano-emulsion Formulation to Improve Intestinal Absorption of Cannabidiol.

Yukako Nakano, Masataka Tajima, Erika Sugiyama, Vilasinee Hirunpanich Sato, Hitoshi Sato

Open access · goldAbstract read
In one paragraph

Article in Medical cannabis and cannabinoids, 2019. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 42 papers.

0numbers the graph read from it
0cells of the map it votes in
42citing papers in PubMed
7.4field-weighted citation impact, top 2% of its field
1 · What the graph read from it

What it found

Each row is one number read from the abstract, on the scale the paper reported it, with its interval. Left of the dashed line favours the treatment, right favours the comparator. Under each row is the sentence it came from. New to these charts? A ten-minute tutorial.

The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.

2 · The registry

The trial behind it

Trials whose registry record cites this paper, or whose number appears in the abstract. A trial that started after this paper was published is citing it as background, not reporting it.

Neither the registry nor the abstract names a trial number. If this is a trial report, that itself is worth knowing.

3 · Its place in the literature

Who cites it

42 citing papers in PubMed, 102 citations in OpenAlex.

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  3. Subchronic Exposure to Low-Dose Cannabidiol (CBD) and ΔPathophysiology : the official journal of the International Society for Pathophysiology · 2026
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  9. Nanomaterials (Basel, Switzerland) · 2025
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4 · The record

Corrections and comments

PubMed lists nothing against this paper. Absence here is not a guarantee, only a check that was made.

5 · Who and what money

Authors and funding

5 authors at 2 institutions in 2 countries.

Yukako NakanoDepartment of Pharmacology, Toxicology and Therapeutics, Division of Pharmacokinetics and Pharmacodynamics, Showa University, Tokyo, Japan.
Masataka TajimaDepartment of Pharmacology, Toxicology and Therapeutics, Division of Pharmacokinetics and Pharmacodynamics, Showa University, Tokyo, Japan.
Erika SugiyamaDepartment of Pharmacology, Toxicology and Therapeutics, Division of Pharmacokinetics and Pharmacodynamics, Showa University, Tokyo, Japan.
Vilasinee Hirunpanich SatoDepartment of Pharmacology, Faculty of Pharmacy, Mahidol University, Bangkok, Thailand.
Hitoshi SatoDepartment of Pharmacology, Toxicology and Therapeutics, Division of Pharmacokinetics and Pharmacodynamics, Showa University, Tokyo, Japan.
Showa University · JPMahidol University · TH

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

backgroundCannabidiol (CBD) is highly lipophilic, and its oral bioavailability is known to be very low in humans. In this study, we developed a novel nanoemulsion preparation of CBD (CBD-NE) to improve the poor solubility and absorption of CBD. The pharmacokinetic profiles of CBD in rats were evaluated after oral administrations of CBD oil and CBD-NE, and the effect of bile secretion on CBD absorption was also evaluated.

methodsThe CBD-NE formulation developed in this study consisted of vitamin E acetate, ethanol, Tween-20, and distilled water (1.7/3.8/70/24.5, w/w%). A CBD oil formulation (CBD oil, control) 100 mg/kg or CBD-NE 50 mg/kg was orally administered to rats, and the blood samples were collected over time. Moreover, the CBD oil or CBD-NE was orally administered to bile-fistulated rats, and the pharmacokinetic profiles of CBD were also evaluated. CBD concentrations in plasma were measured using LC-MS/MS.

resultsThe particle size of CBD-NE was 35.3 ± 11.8 nm. Mean T

conclusionsThe novel NE formulation developed in this study successfully improved the absorption of CBD regardless of bile secretion. The newly developed oral CBD-NE preparation could be useful to achieve a more stable and quicker onset of action by CBD.

Indexed as

AbsorptionCannabidiolNanoemulsionPharmacokinetics

Identifiers

PMID34676332
PMCPMC8489317
OpenAlexW2935308027

What OpenQuestion holds

Textmetadata
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Registered trials

None linked

Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.