Lol. I love how people think this kind of thing could possibly work.
What would you say if I said I'd made a pill that specifically targets your hand and makes if bigger? It's not possible with current knowledge, and certainly not with cheap pills.
When they finally figure it out, I'm pretty sure it will have been the result of hundreds of millions of pounds of research into stem cells, dna manipulation, etc. Not some chemicals.
If we could grow half a penis, we could grow people's fingers back. It may be made of something different, but it's the same thing.
You might as well rub a duck on it, on a sunday, supervised by an irish priest, while singing Money, Money, Money by Abba for all the good any tablets would do.