Following safety factors are used in pharmaceutical manufacturing.
- 1/10 to 1/100th of a normal daily dose = Topical products
- 1/100 to 1/1000th of a normal daily dose = Oral products
- 1/1000 to 1/10000th of a normal daily dose = Injectable & Ophthalmic products
- 1/10000 to 1/100000th of a normal daily dose = Research, investigational products.