Neurobion forte is a nothing but VIT B COMPLEX and it has limited role in PME ie when there is VIT B12 deficiency
Going slow is the key, Learn the art of slowing your breathing before climax
Do kegel exercise
to strengthen your pu muscle
Use thick condoms to reduce sensitivity
If you are an impatient person by nature, hurrying up will spill into your sex life, Work on that.
Avoid rubbing your organ during foreplay. Focus on a long fore play.