Double Dose

Fred went to the doctor's office to get a double dose of Viagra. The doctor told him that he couldn't allow him a double dose.

'Why not?' asked Fred.

'Because it's not safe,' replied the doctor.

Fred said, 'My girlfriend is coming into town on Friday; my ex-wife will be here on Saturday; and my wife is coming home on Sunday.  Can't you see? I must have a double dose.'

The doctor finally relented saying, 'Okay, I'll give it to you, but you have to come in on Monday morning so that I can check you to see if there are any side effects.'

On Monday, Fred dragged himself in; his right arm was in a sling.  The doctor asked, 'What happened to you?'

Fred replied, 'Nobody showed up.'