For all you guys out there who are taking Viagra (sildenafil citrate) for erectile dysfunction, we've got some good news and some bad news.

The good news is that the first generic version of Viagra has been approved by the Food and Drug Administration, so your costs are going down. The bad news is that a recent study found that your sildenafil probably accelerates skin cancer cell growth.

Not to be confused with an earlier study that stated sildenafil is connected to higher rates of melanoma, the current study simply states that if you already have a melanoma tumor, sildenafil stimulates a pathway (it's called cGMP, in case you're interested) that promotes faster spread.

We're pointing this out because the earlier study about ED drugs increasing risk of melanoma was at least partially discredited because the lifestyle of guys who take ED meds wasn't taken into account. They tend to be more active and spend more time outside.

That in and of itself increases their melanoma risk. So here's our tip.

If you're taking sildenafil — generic or brand name — get your skin checked for signs of skin damage or cancer, not once but twice a year. If you're taking sildenafil and develop melanoma, its growth could be accelerated.

And remember, regular checkups and an active, mutually gratifying sex life can help you stay healthy, so keep it up.