Questions tagged [half-life]

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2answers
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How does the process of receptor blocking impact the human cells in context of antihistamine drugs (irreversible antagonist)?

I have problem in understanding what it really means that antagonist is irreversible. I have an allergy and I stopped to take some drugs because of side effects. I tried to predict how long does it ...
2
votes
1answer
87 views

Is the drug's effectiveness directly proportional to the half life formula?

For instance half life of a 150ml drug injected to you is 50 days (so you have 75ml left in your system). At 100 days you'll have 37.5ml left in your system. But does that mean the drug is most ...
1
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1answer
55 views

Relationship between biological half-life and duration of action of a drug

Wikipedia: Half-life describes the time it takes for the blood plasma concentration of a substance to halve its steady-state. First, does this imply that the blood plasma concentration of a drug ...
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0answers
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Which radioactive isotopes in food accumulate in a body, which ones are excreted?

A banana contains a natural radioactive isotope of potassium, however this one is not as dangerous since it gets excreted from the body and so the radiation does not accumulate in a body. But what ...