None can refuse that prevention is always better than cure. Some 
believes
 that the cost is too high for experiments and medication in comparison to spending on precautionary steps. I largely agree with the given notion and my upcoming paragraphs would discuss more on it that how much time and Change the verb form
believe
money
 losses as well as the devastating effects on Use synonyms
animals
 for experiments and finding out new drug therapy.
Use synonyms
Firstly
, an abundance of Linking Words
money
 is needed to establish a research laboratory. It  not only requires high-tech machinery but Use synonyms
also
 needs to pay for manpower. Linking Words
Linking Words
Additionally
 it requires a huge time to establish one new molecule in the market. Add a comma
,Additionally
For example
, the Penicillin drug discovery took 20 years and infected people died because no antibiotics are available. So if humans take care them themselves well in advance so a need arises to search for therapy. 
Linking Words
Secondly
, mandatory to  put Linking Words
animals
 under the threat. without clinical trials on various Use synonyms
animals
 its impossible to discover drug safety and adverse reactions. Use synonyms
For instance
, guinea pigs, rats, rabbits and mice were generally not recovered after an experiment. Linking Words
Consequently
, it leads to an increased death ratio of innocent Linking Words
animals
. 
On the other side research is required to find solutions for some critical problems; Use synonyms
however
, if humans try to keep themself fit so no arise  need for new treatments. Linking Words
Hence
, the precursor is safe and less Linking Words
money
 is required.
To conclude, Use synonyms
Although
 research and new treatments are necessary; Linking Words
however
, if humans take of themselves would reduce the chance to find some new therapy which demands a huge time and Linking Words
money
.Use synonyms