BANGKOK, THAILAND – The Food and Drug Administration (FDA) has warned consumers to stop using the popular herbal inhaler ‘Hong Thai Formula 2’ after laboratory tests revealed contamination with harmful microorganisms. The regulator announced that the product had been formally classified as substandard under the country’s 2019 Herbal Products Act.
Laboratory findings raise serious safety concerns
According to a statement released on 20 October, samples of Hong Thai Formula 2, registered under number G 309/62, were collected directly from the manufacturer and examined by the Department of Medical Sciences. Tests confirmed that the inhaler failed to meet Thailand’s microbiological safety standards.
Three categories of contamination were detected: elevated aerobic microbial counts, excessive yeast and mold levels, and traces of Clostridium spp., a spore-forming bacterium known to present significant health risks. The findings prompted regulators to declare the product unsafe for use.
Manufacturer held responsible
Hong Thai Panich, the company behind the well-known brand, has been instructed to take corrective action. The detected contamination constitutes a breach of the 2021 quality regulations for registered herbal preparations issued by the Ministry of Public Health. The FDA’s classification means the product can no longer be legally distributed.
For Thai consumers, the warning carries serious implications. The inhaler is widely used as a natural remedy to ease colds and clear nasal congestion, but authorities stressed that continued use could endanger health—particularly for people with weakened immune systems, asthma, or chronic conditions.
FDA warning to the public
The agency urged people to dispose of any Hong Thai Formula 2 inhalers immediately. “DO NOT CONTINUE USING THIS PRODUCT,” the FDA stated emphatically in its advisory. Those who have experienced any adverse effects should seek medical attention.
Public health officials also emphasized that herbal or natural branding does not guarantee safety. “UNLIKE WHAT MANY CONSUMERS BELIEVE, NATURAL PRODUCTS CAN CARRY SERIOUS RISKS IF PRODUCTION STANDARDS ARE NOT STRICTLY FOLLOWED,” the FDA noted.
Recurring problems in Thailand’s herbal industry
This incident is part of a broader pattern. The FDA has, in recent years, had to withdraw multiple herbal and traditional preparations from the market after detecting contamination or quality breaches. The agency said stricter oversight is essential to restore consumer confidence.
Consumer rights groups have called for full transparency, demanding that all affected batches be publicly identified and that authorities clarify how the contamination occurred. They also encouraged tighter industry-wide auditing to prevent similar cases.
What consumers should keep in mind
Health agencies recommend that people using herbal inhalers or medicines adhere to these precautions:
• Check registration numbers and verify official approval before purchase
• Avoid unlabelled or unsealed products, even if they appear natural
• Seek medical advice if symptoms worsen after use
• Follow FDA announcements for recall updates and product warnings
The Hong Thai case has reignited debate over the safety of Thailand’s thriving herbal market, which is popular both domestically and among tourists. While regulators stress that many herbal products remain safe, they insist consistent quality monitoring is essential to prevent public health risks.
“EVEN NATURAL INHALERS CAN HARBOR UNNATURAL DANGERS IF OVERSIGHT FAILS,”
the FDA warned.