science

Histamine dihydrochloride

Histamine dihydrochloride is a science topic covered in the lgStudy science library. This page brings together a partial reference excerpt, illustrations, worked examples, real-world applications and a short study plan, so you can understand Histamine dihydrochloride rather than just read about it. In short: Histamine dihydrochloride (trade name Ceplene) is a salt of histamine that is used as a drug for the prevention of relapse in patients diagnosed with acute myeloid leukemia (AML). It is also an FDA-approved active ingredient for topical analgesic use for the temporary relief of minor aches and pains of muscles and joints associated with arthritis, simple backache, bruises, sprains, and strains and is available in ov…

Key takeaways

Histamine dihydrochloride belongs to science; place it in that map before memorising details.
Learn the definition first, then one example that makes the definition concrete.
Connect Histamine dihydrochloride to a quantity you can measure, compute or draw — that is where exam questions come from.
Reproduce the core statement of Histamine dihydrochloride from memory before moving on to harder problems.

Reference excerpt

Histamine dihydrochloride (trade name Ceplene) is a salt of histamine that is used as a drug for the prevention of relapse in patients diagnosed with acute myeloid leukemia (AML). It is also an FDA-approved active ingredient for topical analgesic use for the temporary relief of minor aches and pains of muscles and joints associated with arthritis, simple backache, bruises, sprains, and strains and is available in over-the-counter (OTC) products.

Use in leukemia Histamine dihydrochloride is administered in conjunction with low doses of the immune-activating cytokine interleukin-2 (IL-2) in the post-remission phase of acute myeloid leukemia (AML), i.e. when patients have completed the initial chemotherapy. This combination has been reported to significantly reduce the risk of relapse in AML. The effect is particularly pronounced in patients in their first remission who are below the age of 60. The combination of histamine dihydrochloride and interleukin-2 was approved for use in AML patients within the European Union in October 2008 and is marketed in the EU by the Swedish pharmaceutical company Meda. The drug is also available through a named patient program in several other countries (excluding the US).

Proposed mechanism of action Histamine dihydrochloride acts by improving the immune-enhancing properties of IL-2, and laboratory studies have shown that this combination can induce immune-mediated killing of leukemic cells. The treatment (in the form of subcutaneous injections) is given in 3-week cycles by the patients at home for 18 months, thus coinciding with the period of highest relapse risk. The side-effects include transient flush and headache, whereas IL-2 may induce low-grade fever and inflammation at the site of injection. Histamine dihydrochloride has been developed by researchers at the University of Gothenburg, Sweden.

References

Illustrations

Worked examples

Example 1 — a first encounter with Histamine dihydrochloride

Start with the simplest possible case. Write down what Histamine dihydrochloride claims or describes in one sentence, then invent the smallest concrete situation in which that sentence is true. In science, the smallest case is usually a single object, a single equation or a single measurement. Check that every symbol or term in your sentence has a meaning in that case.

Example 2 — changing one variable

Take the situation from Example 1 and change exactly one quantity: double it, halve it, or set it to zero. Predict what should happen to Histamine dihydrochloride before you calculate. Comparing your prediction with the result is the fastest way to find out whether you understand the idea or only the words.

Example 3 — an exam-style question

Typical questions about Histamine dihydrochloride ask you to (a) state it precisely, (b) apply it to given data, and (c) explain a limitation. Practise writing all three answers in under five minutes; the third part is what separates a full-mark answer from an average one.

Applications of Histamine dihydrochloride

In research: Histamine dihydrochloride appears in science research whenever the underlying quantities have to be modelled precisely. Papers usually cite it as a starting assumption and then explore where it breaks down.
In technology and industry: Engineering practice reuses Histamine dihydrochloride in design rules, simulations and safety margins. Knowing the idea lets you read a specification sheet and understand why the numbers look the way they do.
In the classroom: Histamine dihydrochloride is common in secondary-school and first-year university syllabi. It links to neighbouring topics Histamine, Hydrochlorides, Immunostimulants, so understanding it makes those chapters shorter.
In everyday life: Look for Histamine dihydrochloride outside the textbook — in sport, cooking, traffic, electronics or the sky above you. An example you found yourself is remembered far longer than one you were given.

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How to study Histamine dihydrochloride in 20 minutes

Read the reference excerpt below once, without taking notes.
Close the page and write down what Histamine dihydrochloride means in your own words.
Compare your version with the excerpt and mark what you missed.
Work through the three examples above with pen and paper.
Explain Histamine dihydrochloride out loud to somebody else — or to Teacher Smith in the lgStudy chat.

Frequently asked questions

What is Histamine dihydrochloride in simple terms?

Why does Histamine dihydrochloride matter?

Because it connects several science ideas at once: it gives you a definition you can apply, a quantity you can calculate, and a way to check whether a result is plausible.

How should I study Histamine dihydrochloride?

Read the excerpt, restate it from memory, then work through the examples and applications listed on this page. The five-step study plan above takes about twenty minutes.

What does this page cover?

It gives you a compact reference excerpt plus original lgStudy explanations, examples, applications and study material on Histamine dihydrochloride.