Cannabidiol (CBD): Therapeutic potential, challenges, and new approaches for improved bioavailability

But despite the growing popularity, many questions remain unanswered: How effective is CBD really? What risks exist? And what role does the correct application form play for optimal effect? A recent scientific publication in the European Journal of Pharmaceutical Sciences analyzes exactly these aspects and discusses whether cannabidiol should be considered more as a therapeutic "friend" or a potential "risk factor." The study particularly highlights pharmacological properties, safety aspects, as well as innovative drug delivery strategies to improve bioavailability. This article summarizes the key findings and shows why modern formulation strategies and innovative technologies are crucial for the future of CBD-based therapies.

What is Cannabidiol (CBD)?

Cannabidiol is one of over one hundred identified cannabinoids of the Cannabis sativa plant. Unlike tetrahydrocannabinol (THC), CBD has no psychoactive effect, which makes it especially interesting for therapeutic applications. Scientific studies show that CBD interacts with several biological signaling pathways, particularly with the endocannabinoid system, which regulates numerous physiological processes in the human body. These include, among others:

• Pain perception
• Immune responses
• Inflammatory processes
• Sleep and stress regulation
• Neurological functions

These diverse interactions explain why CBD is being investigated in research as a potential active ingredient for a variety of medical indications.

Medical Potential of CBD

The therapeutic potential of CBD is currently being intensively researched worldwide. Preclinical and clinical studies show indications of several pharmacological effects.

Anti-inflammatory and Antioxidant Properties

One of the best-studied properties of CBD is its anti-inflammatory effect. Chronic inflammation plays a central role in many diseases, including:

• Autoimmune diseases
• Neurodegenerative diseases
• Metabolic syndromes
• Chronic pain

Furthermore, CBD acts as an antioxidant, which can reduce oxidative stress – an important factor in the development of many chronic diseases.

Neurological Applications

CBD is particularly known for its role in treating certain forms of epilepsy. In some countries, CBD-based medications are already approved for specific epileptic syndromes. In addition, CBD is currently being investigated in relation to the following neurological diseases:

• Parkinson's
• Alzheimer's
• Multiple sclerosis
• Anxiety and stress disorders

The neuroprotective properties of CBD could enable new therapeutic approaches in the long term.

Pain Management

Another important research area is the management of chronic pain. CBD may potentially modulate inflammatory pain as well as neuropathic pain. Especially in the context of the global search for alternatives to opioid-containing analgesics, CBD is gaining increasing importance.

The Central Challenge: Low Bioavailability

Despite its great therapeutic potential, CBD exhibits a significant pharmacological challenge: relatively low bioavailability when taken orally.

The reasons for this are diverse:

• Poor water solubility
• Strong first-pass metabolism in the liver
• Instability in the digestive system

When CBD is taken orally, only a portion of the active substance actually enters the systemic bloodstream. A considerable amount is already metabolized in the digestive tract or liver. The result: fluctuating drug concentrations and potentially reduced therapeutic effects. This is exactly why the development of new drug delivery systems is increasingly coming into the focus of research.

Innovative Application Forms for CBD

To improve the pharmacokinetic properties of CBD, scientists are investigating various alternative administration forms.

Sublingual Systems

In sublingual application, CBD is placed under the tongue. There, the active substance can be absorbed directly through the mucous membrane into the bloodstream. Advantages:

• Faster absorption
• Avoidance of part of the first-pass metabolism
• Easy to use

Inhalative Application

CBD can also be absorbed via vaporization or inhalation. This method leads to a very rapid uptake of the active substance through the lungs. However, inhalative applications are not suitable for all patients and sometimes raise regulatory questions.

Transdermal Systems

A particularly promising approach is the transdermal administration of CBD through the skin. In this method, the active substance is absorbed directly or via special formulations – for example, patches or topical systems – continuously through the skin.

Advantages of transdermal systems can include:

• Avoidance of the first-pass effect
• Even drug release
• Stable plasma concentrations
• Potentially fewer side effects

These properties make transdermal technologies especially interesting for long-term therapeutic applications.

Why Modern Drug Delivery Technologies Are Crucial

Research increasingly shows that the therapeutic success of CBD depends not only on the active substance itself but also on the type of formulation and the drug delivery technology used. New pharmaceutical approaches therefore focus on:

• Nanotechnological formulations
• Improved solubility systems
• Lipid-based carrier systems
• Controlled release systems

Such technologies can help significantly increase the bioavailability of CBD while enabling more precise dosing. Especially in pharmaceutical development, it is expected that advanced formulation strategies will play a central role for the next generation of cannabinoid therapies.

Safety Aspects and Regulatory Challenges

With the increasing popularity of CBD, the importance of quality assurance, regulation, and product safety is also growing. While some CBD-based medications are already approved by regulators, the market for over-the-counter products is often less uniformly regulated. The main challenges include:

• Differences in international legislation
• Varying product quality
• Unclear dosing guidelines
• Lack of standardization of extracts

From a scientific perspective, there is thus a great need for further clinical studies, standardized manufacturing processes, and clear regulatory frameworks. Only in this way can it be ensured that CBD-based products can be used both safely and effectively.

Future Perspectives for CBD in Medicine and Pharma

Scientific research on cannabidiol is developing rapidly. New studies continuously provide insights into mechanisms of action, therapeutic potentials, and optimal application forms. Particularly promising are future developments in the areas of:

• Precise drug delivery systems
• Personalized dosage management
• Combined cannabinoid therapies
• Nanotechnological formulations

These innovations could help specifically optimize the pharmacological properties of CBD and open up new therapeutic possibilities.

Conclusion: CBD – Great Potential with Scientific Challenges

Cannabidiol is today one of the most exciting bioactive natural substances in modern pharmaceutical research. Its anti-inflammatory, antioxidant, and neuroprotective properties open numerous potential applications in medicine and therapy. At the same time, scientific studies show that the success of CBD-based therapies strongly depends on factors such as bioavailability, formulation, and application form. Innovative drug delivery technologies and modern pharmaceutical formulations will therefore play a decisive role in unlocking the full potential of CBD. The central question "Friend or foe?" can be answered from today's perspective as follows: CBD is a promising active substance – whose therapeutic possibilities, however, continue to require careful scientific research and technological innovation.

References:

Tihăuan, B.-M. et al. (2025). Cannabidiol – a friend or a foe? European Journal of Pharmaceutical Sciences, 208, 107036.