Thanks for your query.
Sorry for the delay in my response.
The pain in the head, upper back and arms you have could be a side effect of Pulmoperss tablet. This contains Tadalafil
which is used for erectile dysfunction
in males. Due to its action of blood vessels even in head, some experience headache.
Taking medications which will counter act its effects especially only in the head, like Ergot alkaloids will help.
Vasograin is such a brand. Do discuss with your treating doctor and get a hand written prescription for the same and get rid of the pain you have.
Wish you good health.