Thanks for posting your query.
Do not go for medicines at this age.
Eat healthy food and acquire good habits , that is free from smoking
or alcohol abuse
And be stressfree and exercise like walking.
Also concentrate more on foreplay and delay penetration little late.
Also include more love by being caring to your wife which makes her also to be actively involved.
Since females give importance to the love and care provided by their husband and accordingly respond sexually.
Hope I have answered your query.
Wishing you good health.