Hiii
There is nothing to worry about so much of dose. Maximum toxic dose of PCM is 12gms.
With the dose of 3gm(2gm , followed 7hrs later by 1 gm) is not going to do any harm except for mild gastritis only after ingestion due to gastric irritation. Regarding
liver damage, forget about it..nothing to worry. The above said doses (12gm)may harm liver...
Stay happy, shed anxiety, stay healthy