Both Chaihu Shu Liver Pill and Mu Xiang Shun Qi Pill can treat gastric distension. Chaihu Shu Liver Pill is used for Qi stagnation; Mu Xiang Shun Qi Pill is used for dampness obstruction, so there is no comparison of efficacy between them. 1. Chaihu Shu Liver Pill is composed of Poria cocos, Citrus aurantium dulcis, Cardamom, Paeonia lactiflora and Glycyrrhiza glabra, etc. It can soothe the liver and regulate the qi, eliminate flatulence and relieve pain. It is used for liver-qi disharmony, chest and hypochondrium (a collective term for the chest and rib area) constriction, stagnant and unclear food, and vomiting and sour water. The adverse effects and contraindications of this drug are not clear. 2. MUXIANG SHUNQI PILL is composed of MUXIANG, SANREN, VINEGAR Aroma, BENGALI, GANCAM, CHENPI, etc. It can move qi and eliminate dampness, invigorate the spleen and harmonize the stomach (restoring the functions of the spleen and stomach). It is used for chest and diaphragm constriction, courtyard and abdominal distension and pain, vomiting and nausea, aspiration and nausea (lack of appetite and reduced food intake) caused by dampness in the middle yang and disharmony between the spleen and stomach. The adverse reactions and contraindications of this drug are not known. Seek medical advice promptly if you feel unwell, and use the above medicines as prescribed by your doctor.