Dosage of this drug is up to 350mg and it shouldn’t be increased. Taking more pills won’t amplify the effect but will amplify side effects. Also, if for any reason you skip the term for taking the drug you shouldn’t take the double dosage after that.
You should keep your Soma away from children and in dry and dark place. It can have much heavier effect on kids so try to keep it locked where they can’t reach it.