If the alcohol is too strong for you, try using witch hazel in place of vodka (you can buy it at any drug store). It is more mild and soft, but as effective.
Spray underarms to cover the area, once a day or every 12 hours. The deodorant will stay good indefinitely.
Ingredients: distilled water, lavender, grapefruit, tea tree (woman’s), cedar, patchouli, tea tree (men) essential oils.