A little off topic, but telomerase research indicates it may be possible to not only stall, but potentially reverse the effects of aging. The downside at this time is the increased risk if cancer.^ FYI, it won't be a pill per se, but nano medical-bots that travel throughout your system, repairing cellular and DNA defects and rewriting your DNA to keep the aging triggers to a minimum, within repairable feasibility. The ideal would be to have these in your system by your late 20's, and as your indoctrination age increases your ability to "recover" youthful characteristics diminishes. The only trouble is that they'll then have to enact age limits, kind of like Logan's Run, or else we'll have some serious overpopulation problems.
Max