1) Fragmentation: uneven pressure distribution and poor compression molding of materials are the main causes of fragmentation. The main solution is to choose accessories with small elasticity and large plasticity; Select the appropriate tablet press and operating parameters.
2) Loose sheet: The main reason is that the viscosity is not enough, and the compression force is insufficient. The solution is to increase the amount of adhesive or replace the appropriate adhesive.
3) Sticky punching: the main reasons are that the particles are not dry enough, the material is easy to absorb moisture, the lubricant is not selected properly or the amount is insufficient, and the surface of the punch is rusty or rough. In general, the cause should be identified and resolved according to the actual situation.
4) Excess weight difference: The main reasons are poor particle fluidity, too much fine powder in the particles or a huge difference in the size of the particles, more and sometimes fewer particles in the hopper, and poor consistency between the punch and the die hole. In general, the cause should be identified and resolved according to the actual situation.
5) Delay in disintegration: The tablet exceeds the time limit for disintegration specified in the Pharmacopoeia. The solution is to regulate the pressure appropriately; Add appropriate disintegrants, adhesives, etc.
6) Dissolution overrun: The main reason is that the tablet does not disintegrate, the granules are too hard or the solubility of the drug is poor, etc., which should be solved according to the actual situation.
7) Uneven drug content in tablets: the weight difference of tablets is too large, the mixing of small doses of drugs is uneven, and soluble components migrate between particles. The solution is to prepare the appropriate size particles and mix them well.