science

Theophylline/ephedrine

Theophylline/ephedrine 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 Theophylline/ephedrine rather than just read about it. In short: Theophylline ephedrine (INNTooltip International Nonproprietary Name), or theophylline/ephedrine, sold under the brand name Franol among others, is a fixed-dose combination formulation of theophylline, an adenosine receptor antagonist, and ephedrine, a norepinephrine releasing agent and indirectly acting sympathomimetic agent, which has been used as a bronchodilator in the treatment of asthma and as a nasal deconges…

Key takeaways

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

Reference excerpt

Theophylline ephedrine (INNTooltip International Nonproprietary Name), or theophylline/ephedrine, sold under the brand name Franol among others, is a fixed-dose combination formulation of theophylline, an adenosine receptor antagonist, and ephedrine, a norepinephrine releasing agent and indirectly acting sympathomimetic agent, which has been used as a bronchodilator in the treatment of asthma and as a nasal decongestant. It was first studied and used to treat asthma in the 1930s or 1940s and combinations of the two drugs subsequently became widely used. A ratio of 5:1 theophylline to ephedrine is usually used in combinations of the drugs. Later research found that the combination was no more effective for asthma than theophylline alone but produced more side effects. Combinations of theophylline, ephedrine, and phenobarbital (brand name Tedral among others) have also been widely used to treat asthma. Many such combinations have been marketed with numerous brand names. Theophylline has also been marketed in combination with other ephedrine-like sympathomimetics like racephedrine and pseudoephedrine and with other barbiturates such as amobarbital and butabarbital, among other drugs. A combination of theophylline, ephedrine, and hydroxyzine has been marketed under the brand name Marax among others as well. Combinations of theophylline, ephedrine, and a barbiturate were later phased out in favor of combinations of theophylline and ephedrine alone (e.g., brand name Franol). Fixed-dose combinations of theophylline and ephedrine were abandoned after the 1970s as they did not allow for dose titration in asthma therapy owing to the toxicity of ephedrine. The effects of theophylline/ephedrine as a performance-enhancing drug in exercise and sports have been studied. Use of theophylline/ephedrine combinations has led to disqualification of elite athletes due to ephedrine being banned in competitive sports.

See also Cafedrine Fenethylline Theodrenaline

References

Illustrations

Worked examples

Example 1 — a first encounter with Theophylline/ephedrine

Start with the simplest possible case. Write down what Theophylline/ephedrine 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 Theophylline/ephedrine 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 Theophylline/ephedrine 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 Theophylline/ephedrine

In research: Theophylline/ephedrine 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 Theophylline/ephedrine 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: Theophylline/ephedrine is common in secondary-school and first-year university syllabi. It links to neighbouring topics Adenosine receptor antagonists, Beta-Hydroxyamphetamines, Bronchodilators, so understanding it makes those chapters shorter.
In everyday life: Look for Theophylline/ephedrine 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.

Ask Teacher Smith questions about this articleOpens your AI tutor with a question about “Theophylline/ephedrine” →

Affiliate

Preply — study more efficiently by working with a personal tutor. 50% off.

How to study Theophylline/ephedrine in 20 minutes

Read the reference excerpt below once, without taking notes.
Close the page and write down what Theophylline/ephedrine 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 Theophylline/ephedrine out loud to somebody else — or to Teacher Smith in the lgStudy chat.

Frequently asked questions

What is Theophylline/ephedrine in simple terms?

Why does Theophylline/ephedrine 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 Theophylline/ephedrine?

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 Theophylline/ephedrine.