What Is Imipramine HCL Dosage For Treatment Of Urinary Incontinence?

What is maximum allowable dosage of Imipramine HCL 25 mg for male urinary incontenence. I am currently taking 3 25 mg tablets twice a day. Previously I had been taking two tablets twice a day. I increased the dosage because I still have leakage, it helped somewhat. I was wondering if I could continue to increase the dosage until I have nearly completely eliminated the leakage?