User:Zefr/sandbox
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The English Wikipedia has 118,409 active editors, out of 48,141,682 accounts that have been registered. Countless people have edited without using an account. There are 847 administrators, of whom fewer than 500 are active. Together the community has made 1,247,674,794 edits to 61,682,927 pages, of which just 6,898,961 are articles – so a lot goes on behind the scenes.
4 |
This user has set foot in 4 continents of the world. |
29 | This user has visited 29 of the 205 countries in the world. |
This user has visited 17 of the 27 EU Member States. |
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This user has visited 45 of the 50 U.S. states and the District of Columbia. |
This user has visited the Caribbean. |
Example table
[edit]Summary of clinical trial phases | ||||||
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Phase | Primary goal | Dose | Patient monitor | Typical number of participants | Success rate[1] | Notes |
Preclinical | Testing of drug in non-human subjects, to gather efficacy, toxicity and pharmacokinetic information | unrestricted | scientific researcher | not applicable (in vitro and animal studies only) | ||
Phase 0 | Pharmacokinetics; particularly, oral bioavailability and half-life of the drug | very small, subtherapeutic | clinical researcher | 10 people | often skipped for phase I | |
Phase I | Testing of drug on healthy volunteers for safety; involves testing multiple doses (dose-ranging) | often subtherapeutic, but with ascending doses | clinical researcher | 20–100 normal healthy volunteers (or for cancer drugs, cancer patients) | approximately 70% | determines whether drug is safe to check for efficacy |
Phase II | Testing of drug on patients to assess efficacy and side effects | therapeutic dose | clinical researcher | 100–300 patients with specific diseases | approximately 33% | determines whether drug can have any efficacy; at this point, the drug is not presumed to have any therapeutic effect whatsoever |
Phase III | Testing of drug on patients to assess efficacy, effectiveness and safety | therapeutic dose | clinical researcher and personal physician | 300–3,000 patients with specific diseases | 25–30% | determines a drug's therapeutic effect; at this point, the drug is presumed to have some effect |
Phase IV | Post marketing surveillance – watching drug use in public | therapeutic dose | personal physician | anyone seeking treatment from their physician | N/A | watch drug's long-term effects |
- ^ "Step 3. Clinical research". US Food and Drug Administration. 14 October 2016. Retrieved 1 February 2017.