Deputy House speaker Padipat Suntiphada has come under fire after posting a video clip of himself drinking beer on social media, which some say could be a violation of the law.
The furore began after Mr Padipat, a Move Forward Party (MFP) MP for Phitsanulok, reviewed a can of beer brewed in his home province on Tiktok.
This prompted a flurry of criticism from netizens, who pointed to the law which prohibits the advertising of alcoholic beverages.
Tankhun Jittitsara, a former Democrat Party MP, called on House speaker Wan Muhamad Noor Matha to look into whether Mr Padipat breached the ethical code for political-office holders.
Democrat spokesman, Ramet Rattanachaweng, warned that Mr Padipat's action may constitute a violation of the Alcoholic Beverage Control Act.