Ijpsr (2009), Issue 1, Vol

Small Molecule Drugs: By their small size these drugs can easily enter inside the cell and used for targets.

Side Effects: The common side effects are diarrhea, liver problems. Other side effects are:

• 
  Fatigue
  
• 
  Mouth sores
  
• 
  Loss of hair color
  
• 
  Nail changes
  
• 
  High blood pressure
  
• 
  Skin problems include dry skin and rash.
  
• 
  Problem with wound healing and blood clotting
  

Rare side effects are: Might a whole form through the wall of the small intestine, esophagus, large bowel, or stomach
These side effects may prevent or treated by medicines.
Note: This therapy has some drawbacks, they are:

• 
  Cancer cells become resistant to them so target therapy can use with other cancer therapies.
  
• 
  Drugs are hard to develop for some specific targets like target structure and function.
  

Hormone / Hormonal / Endocrine therapy: In this therapy, hormones are used to treat cancer, such as prostate and breast by stop and slow growth of those hormones ^46-49.
If this therapy is taken for prostate cancer then regular PSA tests performed for checking the progress of the therapy. If the PSA level will stay the same or go down then the therapy is working, but if the PSA level goes up then are results that the therapy is not working.
If this therapy is taken for breast cancer then regular checkup of neck, chest, underarm and breast areas is performed. When this therapy is used with other cancer treatments:

• 
  Neo-adjuvant therapy, in this tumor is made smaller before surgery or radiation therapy.
  
• 
  Adjuvant therapy decrease the risk of coming back of cancer after therapy.
  
• 
  Destroy cancer cells which are come back after treatment.
  

This therapy is given in many ways including:

•