The product had all sorts of legal/regulatory issues.  Mixing foods and drugs in one product is a big no-no in most developed countries with strong regulatory systems.  The FDA got them primarily on labeling violations for undeclared drugs and milk, but they are very sensitive to food or dietary supplement products like this where a food contains substances that are or act like drugs.  Lots of small companies with no expertise in regulatory affairs launch products similar to this one and recalls are not uncommon - they just are usually never noticed by anyone outside a very narrow group of people working in the area.  

Nothing to stop anyone from taking their Viagra with a cup of coffee - caffeine definitely makes aspirin work better (eg, Excedrin) and probably does the same for ED drugs.  In fact, I once did the opposite and ruined a Viagra moment by taking a sinus medication with pseudo-ephedrine to counter-act side-effects on sinuses - and unfortunately it worked the same way on other body parts.  (Now I use a nasal spray which just works locally.)

The guy who died from caffeine chugged an energy drink right after consuming a huge coffee - not very smart.

Googled it and sure enough ... the link is below. Funny that the coffee was advertised to make men better in the bedroom because it had natural herbs in it. Sounds like they added a "booster"...

Here's some addition details