Good Morning,To the best of my knowledge this is a drug you take daily not when needed. I find that it has been a good drug for me. It is non-habit forming and your dose can be taken twice daily - one in the morning and once in the evening.
The maximum adult dose is 60 mg daily, but most patients respond to 15-30 mg daily. I started out on 10 mg once daily about 5 years ago and currently take 30 mg twice daily.
The medication may, in fact, not be helpful for you due to the prescribing instructions, perhaps you could call you pharmacist to ask what the normal dosing instructions for this medication are and once you have that info you may want to call your Dr. to question the dosing schedule.
Kindly,
Kitt