Thanks for your query,based on the facts that you have posted it appears that you have Necrospermia.
Necrospermia is mainly due to either presence of infection in seminal vesicle
or prostate or due to presence of anti sperm antibody which kill the sperms.
There are no medicines to be proved effective to treat Necrospermia.and to improve sperm count
Please consult qualified infertility
specialist for further evaluation to find out the cause of Necrospermia and or else to explore possibility of conceiving with the help of newly assisted reproductive techniques
like Sperm concentration,.IVF or ICSI.