best prescription for constipation?

What is the best prescription for constipation? 

I haven't been to the bathroom in over a week.Initially, management of constipation will be concentrated on adequate hydration (drinking plenty water), diet (prune juice, leafy vegetables, fruits and plenty of fiber), along with plenty of exercise. If the constipation persists, there are plenty of over-the-counter treatment options available we can list for you, but only your doctor can recommend treatment for you. There are a few different categories of laxatives; the bulk-producing agents, the stool softeners, the lubricants, the hydrating agents (including both saline and hyperosmotic agents) and lastly, the stimulants. The first one to mention are the bulk-producing agents. Examples would include Metamucil (psyllium), Citrucel (methylcellulose) and dietary fiber such as apples and broccoli. Bulk-producing agents cause the stool to be bulkier and to retain more water, as well as forming an emollient gel, making it easier for peristaltic action (the wave like muscular contractions of the alimentary canal or other tubular structures by which contents are forced onward toward the opening) to move it along. They should be taken with plenty of water. Bulk-producing agents have the gentlest of effects among laxatives and can be taken just for maintaining regular bowel movements.