HPMC empty capsules can be used to fill liquid drugs, but there are some precautions. The filling of liquid drugs usually requires specific processes, as the properties of liquids are different from those of solid powders, which may cause capsule deformation, leakage, or dissolution. In order to ensure the safe encapsulation of liquid drugs in HPMC capsules, special filling techniques are usually used, such as precise control through the use of capsule filling machines. Liquid drugs generally require high sealing of capsules to prevent liquid leakage or contact with the external environment. Therefore, it is necessary to choose capsule specifications suitable for liquid drugs and carry out appropriate packaging treatment. Overall, HPMC empty capsules can be used for the encapsulation of liquid drugs, but it is important to ensure appropriate technology and equipment to avoid any issues.