Rather than using a drug to stimulate a reaction when required, the new medication is taken regularly.
The manufacturers, Eli Lilly, claims that the new way of taking the drug removes the forward planning needed with other impotence pills, like Viagra.
It will be available on the NHS for certain conditions, although the bulk of sales of the drug are expected to be through private prescription.
The pill, cialis, also called tadalafil, is already available in the more traditional form but have now been turned into an "everyday" version.
An estimated 2.3 million men in Britain are thought to suffer from the erectile problems, which can be caused by a variety of conditions.
Conditions for which patients might be eligible for the treatment on the NHS include diabetes, multiple sclerosis, Parkinson's, prostate cancer and polio.
Privately the drug will cost £54.99 a month, for 28 tablets.
The manufacturers also warn that the pill works only with "sexual stimulation".
There are also a number of side effects, including a headache or an upset stomach.
At the moment it is will only be available on prescription and not over the counter in chemists.
