rickets is a nutritional disorder that can develop if you do not get enough vitamin d calcium or phosphate rickets leads to poor functioning of a bone s growth plate growing edge softened and weakened bones stunted growth and in severe cases skeletal deformities
Hence, a 20-year period of the patent usually gives manufacturers a chance to recoup the cost of developing a new drug. When a drug patent expires, any pharmaceutical company can manufacture and sell the drug. A drug, which is produced and distributed without patent protection is called a generic drug.
Given that almost all the compounds in the current study retained full potency under conditions that may not have been ideal for 28 to 40 years, the researchers suggest that expiration dates for many medications could be extended. Doing so could potentially yield significant savings on prescription drug costs.