These drugs enhance the effects of nitric oxide, a chemical that helps to increase blood flow in the penis.
For example, they may enhance the effects of some medications or negate any benefit.
Better training strategies and therapies to enhance the effects of these rehabilitative protocols are currently being developed for poststroke disability.
Some prescription drugs can enhance the effects of coffee and other caffeinated drinks.
A painter's palette of colours, dusty but strong, enhance the effects: mauve in the airy living room, a yellow to make the bedroom "a place of golden dreams".
Kitty Daly's costumes enhance the effects with creations like pale blue puffballs, keening Renaissance women and individuals with suspiciously angling legs who turn into two people.
But now a new animal study has found biological evidence that nicotine may actually enhance the effects of cocaine.
Hundreds of liquid medications sold over the counter contain alcohol, which can counteract or enhance the effects of other drugs and, in overdoses, can poison a small child.
Ito, H. et al. Reactive oxygen species induced by non-steroidal anti-inflammatory drugs enhance the effects of photodynamic therapy in gastric cancer cells.
Previous research has suggested that antihistamines can enhance the effects of some drugs of abuse.
But steroids enhance the effects of hard work, typically in the form of weight-lifting, but do not substitute for it, as do pregame visualization techniques, banana-flavored energy bars and Grade A homogenized milk.
