Thanks for your query.Based on the facts that you have posted it appears that you have what is called as Oligoasthenospermia.To be true there are many medicines in the market from various faculties of medicine who claim to be effective in treatment to improve sperm motility
. but the fact of the matter is that not a single medicine has been proved effective scientifically to prove their claim and results.
Please consult qualified Infertility
Specialist for detail evaluation and help regarding efficacy of Assisted Reproductive Technique (ART) to impregnate your wife.