The cocaine product is further dried to convert it into cocaine hydrochloride. Cocaine hydrochloride is the street product that is a white, crystalline powder with a bitter taste and numbing effect.. Cocaine loses its potency in other forms and it is also less soluble. Cocaine must be water soluble so that it can be injected, otherwise the drug can be in clumps when injected which can lead to cardiac arrest. As cocaine hydrochloride, which is a salt, the drug can be both injected and snorted and is absorbed into the blood-stream easily.
Olopatadine is an antihistamine (as well as anticholinergic and mast cell stabilizer), sold as a prescription eye drop manufactured by Alcon in one of three strengths: % solution or Pazeo in the United States , % solution or Pataday (also called Patanol S in some countries), and % or Patanol (also called Opatanol in some countries; Olopat in India). It is used to treat itching associated with allergic conjunctivitis (eye allergies ).  A steroid-free  nasal spray formulation is sold as Patanase , which was approved by the FDA on April 15, 2008.  It is also available as an oral tablet in Japan under the tradename Allelock , manufactured by Kyowa Hakko Kogyo. 
We take great care to make sure that the information in this leaflet is correct and up-to-date. However, medicines can be used in different ways for different patients. It is important that you ask the advice of your doctor or pharmacist if you are not sure about something. This leaflet is about the use of these medicines in the UK, and may not apply to other countries. The Royal College of Paediatrics and Child Health (RCPCH), the Neonatal and Paediatric Pharmacists Group (NPPG), WellChild and the contributors and editors cannot be held responsible for the accuracy of information, omissions of information, or any actions that may be taken as a consequence of reading this leaflet.