1. Effectiveness Timeline:
   Minoxidil typically shows results within 4 to 6 months. Lack of improvement after three years suggests it may not be effective for you.

2. Consultation with a Specialist:
   Discuss your experience with a dermatologist or hair specialist to explore other causes of hair loss and alternative treatments.

3. Possible Alternatives:
   Consider treatments like finasteride, platelet-rich plasma therapy, or hair transplant depending on your condition.

4. Safety of Discontinuation:
   Stopping Minoxidil is generally safe, but hair loss may resume or accelerate after stopping.

5. Monitoring and Follow-up:
   Regular follow-up with your healthcare provider can help tailor the best approach for your hair loss.

Discuss these points with your doctor to make an informed decision about continuing or stopping Minoxidil.