elixir
US /iˈlɪk.sɚ/
UK /iˈlɪk.sɚ/

1.
a magical or medicinal potion
:
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The alchemist claimed his elixir could grant eternal youth.
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The old woman brewed a special elixir for her ailing husband.
2.
a preparation, usually a flavored, sweetened hydroalcoholic solution, used as a vehicle for medicinal substances
:
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The cough syrup was an elixir containing various active ingredients.
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Pharmacists often use an elixir base for liquid medications.
3.
a substance or liquid considered to have a stimulating or invigorating effect
:
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A strong cup of coffee is my morning elixir.
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The fresh mountain air was a true elixir for her tired spirit.