Study on Chemical Composition Changes of Cannabis in the Suk Saiyas Formula

Main Article Content

Piyatas Jaiyen
Witoon Youngsaad
Preecha Nootim
Keeratiya Pankhum
Thanachat Pongkhamsing

Abstract

Objective: To investigate the changes in the chemical composition of cannabis in the Suk Saiyas formula during storage. Methods: The Suk Saiyas formula, manufactured and quality-controlled by the Division of Traditional and Herbal Medicine Development, was stored at 30°C and 40°C under a relative humidity of 75 ± 5% for 6 months. The contents of the major cannabinoids—tetrahydrocannabinol (THC), cannabinol (CBN), and cannabidiol (CBD)—were quantified using high-performance liquid chromatography (HPLC). Results: The concentration of THC demonstrated a significant decrease under both storage conditions. After 6 months, THC decreased by 19.53% at 30°C and by 24.85% at 40°C. In contrast, the CBN concentration increased substantially, rising by 57.48% at 30°C and by 92.34% at 40°C, indicating the oxidative conversion of THC to CBN, a natural degradation pathway of cannabinoids. The CBD content showed only slight changes, with small increases of 3.17% and 4.29% at 30°C and 40°C, respectively, suggesting high stability of CBD under the tested storage conditions. Conclusion: The findings emphasize the importance of controlling temperature and humidity during storage to preserve the quality and active constituents of the Suk Saiyas formula.

Article Details

Section
Research Articles

References

Department of Thai Traditional and Alternative Medicine Development. Khamphi That Phra Narai (Tamra Osot Phra Narai) collection of Thai traditional medical wisdom, conservation edition. Nonthaburi: War Veterans Organization of Thailand Printing House; 2012.

Tengtermwong N. Effectiveness and safety of Suk Sai-Yad herbal remedy for chronic insomnia: A preliminary retrospective study in Chao Phya Abhaibhubejhr Hospital. Journal of Thai Traditional and Alternative Medicine 2021; 19: 229-39.

Herbal Product Division, Food and Drug Administration. National list of essential medicines: Herbal medicines B.E. 2566 (2023). Nonthaburi: Minnie Group; 2023.

Department of Thai Traditional and Alternative Medicine. Collection of Thai Traditional medical wisdom, conservation edition: National Thai traditional medicine formulas containing cannabis. Chotichanadechawong N, Sumontree S, editors. Nonthaburi: Samcharoen Panich; 2021.

Thongjeen T, Masud S, Thiemthieprat P, Ruangkhet S, Onthong S, Banyat P, et al. Development of an ultra high performance liquid chromatography method for the analysis of cannabinoids in cannabis leaves. Bulletin of the Department of Medical Sciences 2021; 63: 505-23.

National Academies of Sciences, Engineering, and Medicine. The health effects of cannabis and cannabinoids: The current state of evidence and recommendations for research. Washington, DC: National Academies Press; 2017.

Jaidee W, Siridechakorn I, Nessopa S, Wisuitiprot V, Chaiwangrach N, Ingkaninan K, et al. Kinetics of CBD, Δ9-THC degradation and cannabinol formation in cannabis resin at various temperature and pH conditions. Cannabis Cannabinoid Res. 2022; 7: 537-47.

Mechoulam R, Hanuš L. A historical overview of chemical research on cannabinoids. Chem Phys Lipids. 2000;108:1-13.

Arnold JC, Hanbury-Brown CVO, Anderson LL, Bedoya-Pérez MA, Udoh M, Sharman LA, et al. A sleepy cannabis constituent: cannabinol and its active metabolite influence sleeP architecture in rats. Neuropsychopharmacology. 2025; 50: 586–95.

Bonn-Miller MO, Feldner MT, Bynion TM, Eglit GM, Brunstetter M, Kalaba M, et al. A double-blind, randomized, placebo-controlled study of the safety and effects of CBN with and without CBD on sleep quality. ExP Clin Psychopharmacol 2024; 32: 277-84.

Pertwee RG. The diverse CB1 and CB2 receptor pharmacology of three plant cannabinoids: delta9-tetrahydrocannabinol, cannabidiol and delta9-tetrahydrocannabivarin. Br J Pharmacol. 2008; 153: 199-215.

Russo EB. Taming THC: potential cannabis synergy and phytocannabinoid-terpenoid entourage effects. Br J Pharmacol. 2011;163:1344-64.

Grotenhermen F, Müller-Vahl K. The therapeutic potential of cannabis and cannabinoids. Dtsch Arztebl Int. 2012; 109: 495-501.

Khouchlaa A, Khouri S, Hajib A, Zeouk I, Amalich S, Msairi S, et al. Health benefits, pharmacological properties, and metabolism of cannabinol: A comprehensive review. Ind Crops Prod. 2024; 213: 118359.

Department of Thai Traditional and Alternative Medicine. The Thai Herbal Preparation Pharmacopoeia (THPP) [online]. 2023 [cited Sep 13, 2025]. Available from: thpp.dtam.moph.go.th/

International Conference on Harmonisation of Technical Requirements for Registration of Pharmaceuticals for Human Use. ICH harmonised tripartite guideline: Stability testing of new drug substances and products Q1A(R2) [online]. 2003 [cited Jul 14, 2025]. Available from: www.ich.org/page/quality-guidelines

Hädener M, Stefan K, Weinmann W. Quantitative determination of CBD and THC and their acid precursors in confiscated cannabis samples by HPLC-DAD. Forensic Sci Int 2019; 299: 142-150.

Park Y, Mackie AL, MacIsaac SA, Gagnon GA. Photo-oxidation of 11-nor-9-carboxy-Δ9-tetrahydrocannabinol using medium-pressure UV and UV/H2O2 – a kinetic study. Environ Sci Water Res Technol. 2018; 4: 1292-300.

Lindholst C. Long term stability of cannabis resin and cannabis extracts. Aust J Forensic Sci. 2010; 42: 181-90.

Trofin IG, Dabija G, Vaireanu DI, Filipescu L. Long - term storage and cannabis oil stability. Rev Chim. 2012 ;63: 293-7.

García-Valverde MT, Callado CSC, Díaz-Liñán MC, Sánchez de Medina V, Hidalgo-García J, Nadal X, et al. Effect of temperature in the degradation of cannabinoids: From a brief residence in the gas chromatography inlet port to a longer period in thermal treatments. Front Chem. 2022; 10: 1038729.

Iffland K, Carus M, Grotenhermen F. Decarboxy- lation of tetrahydrocannabinolic acid (THCA) to active THC. EIHA: Hürth,Germany, 2016.

Fučak T, Kreft S, Svedružić ŽM, Tavčar E. Mechanism and kinetics of CBDA decarboxylation into CBD in hemp. J Plant Biochem Biotechnol. 2023; 32: 608-21.

Filer CN. Acidic cannabinoid decarboxylation. Cannabis Cannabinoid Res. 2022; 7: 262-73.