The twenty first century has opened new probabilities in the field of medication research and development but it still remains really expensive process. You may find that a cost of medical discoveries and development needs form US$ 897 million to US$ 1.9 billion. Chemists want usually fifteen years to research all the specific characteristics of this or that drug. The procedure of a new medication discovery involves identification a target of an experiment (e.g. protein) and after it researchers are to find appropriate medications that will interact with a target and give some results. Clinical testing is the most comprehensive and high-priced stage in drug research and is done in order to obtain the needed government approbation. Food and Drug Administration (FDA) gives approvals to the medications that would be released in the US. Drug discovery process requires a lot of costs and efforts to make all the things in the right way.

The best way of identification good medical candidate is investigation of the reaction of target protein with various compounds that are chosen by scientists from peculiar compound lists where these compounds are situated. To provide this examinations researchers use high-throughput screening (HTS) technology. Compound lists are commercially available in sizes of up to several millions of compounds. There are some exemplars that show good results with communicating the target. They are promising exemplars and chemists usually name them hits. After that some hits are taken to direct compounds. Further they will be improved and transformed to get better outcome from their interaction and less side-effects.

Scientists single out two methods of drug design & discovery these days. The next are means for finding a drug candidates, along with their pros and cons:

1. Virtual screening (VS) is a way that makes researches virtually as if there genuine screening were used;

The basic benefits of this mode compared to laboratory tests are:

- not so expensive, scientists will not synthesize any compounds by themselves and so the expenses is not needed for chemical process;

- scientists can research different compounds that are yet in perspective;

- the thing that HTS method is really high-priced makes chemists use virtual screening to choose the best compounds virtually and then use this definite amount of them during HTS tests;

- it has a large list of chemicals that scientists may use.

There are accessible a large number of different elements in virtual screening tests in comparison with the quantity that gives high-throughput screening mode. The shortage of virtual screening is that it may not replace the genuine screening.

2. The genuine screening, such as high-throughput screening (HTS), may experimentally test the activity of hundreds of thousands of compounds against the target per day. This method provides genuine results that are utilized for drug discovery. But it needs huge funds.

These means perform the interaction of a given target (protein) with different elements. They can be applied to help build hypotheses about required chemical features when creating the medication and, besides, they can be used to improve and modify drug candidates. Nowadays chemists use 3 basic means for virtual screening in drug discovery procedure: Molecular Docking, Quantitative Structure-Activity Relationships (QSAR) and Pharmacopoeia Mapping. With any enquires about drug discovery service you may ask our web source.