Urinary Tract Infection?

My boyfriend has a uti but it has not gone away, hes had it for about 4 days now, hes been taking AZO maximum to get rid of it, especially cranberry supplements and juice concentrate. he says that the pain has gone away, but the frequency and urge, and full bladder are still there, also dribbling is constant as well, my friend has antibiotics for her uti that she had, we dont have health insurance and cant afford to go to the doctor, would it hurt to try the antibiotics?