science

Pizotifen

Pizotifen 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 Pizotifen rather than just read about it. In short: Pizotifen, also known as pizotyline and sold under the brand names Sandomigran and Mosegor among others, is an antimigraine agent of the tricyclic group which is used primarily as a preventative to reduce the frequency of recurrent migraine headaches. Medical uses Migraine headaches The main medical use for pizotifen is for the prevention of migraine and cluster headache.

Key takeaways

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

Reference excerpt

Pizotifen, also known as pizotyline and sold under the brand names Sandomigran and Mosegor among others, is an antimigraine agent of the tricyclic group which is used primarily as a preventative to reduce the frequency of recurrent migraine headaches.

Medical uses

Migraine headaches The main medical use for pizotifen is for the prevention of migraine and cluster headache. Pizotifen is one of a range of medications used for this purpose, other options include propranolol, topiramate, valproic acid, cyproheptadine and amitriptyline. While pizotifen is effective in adults, evidence of efficacy in children is limited, and its use is limited by side effects, principally drowsiness and weight gain, and it is usually not the first choice medicine for preventing migraines, instead being used as an alternative when other drugs have failed to be effective. It is not effective in relieving migraine attacks once in progress.

Other uses Pizotifen has also been reported as highly effective in a severe case of erythromelalgia, a rare neurovascular disease that is sometimes refractory to the other drugs named above. Other applications for which pizotifen may be used include as an antidepressant, or for the treatment of anxiety or social phobia. Animal studies also suggest that pizotyline could be used in the treatment of serotonin syndrome or MDMA overdose in a similar manner to the closely related antihistamine/anti-serotonin medication cyproheptadine. Pizotifen might be useful as a hallucinogen antidote or "trip killer" in blocking the effects of serotonergic psychedelics like psilocybin. It might also be useful in the treatment of MDMA overdose.

Contraindications Caution is required in patients having closed angle glaucoma and in patients with a predisposition to urinary retention as the medication exhibits a relatively small anticholinergic effect. Dose adjustment is required in people who have chronic kidney disease. Liver injury has also been reported. Pizotifen treatment should be discontinued if there is any clinical evidence of liver dysfunction during treatment. Caution is advised in patients having a history of epilepsy. Withdrawal symptoms like depression, tremor, nausea, anxiety, malaise, dizziness, sleep disorder and weight decrease have been reported following abrupt cessation of pizotifen. Pizotifen is contraindicated in patients who suffer from hypersensitivity to any of its components or have gastric outlet obstruction, angle-closure glaucoma, and difficulty urinating. In addition, women who are pregnant should not take pizotifen.

Adverse effects Side effects include sedation, dry mouth, drowsiness, increased appetite and weight gain. Occasionally it may cause nausea, headaches, or dizziness. In rare cases, anxiety, aggression and depression may also occur.

Pharmacology

Pharmacodynamics

Pizotifen is a serotonin antagonist acting mainly at the 5-HT2A, 5-HT2B, and 5-HT2C receptors. It also has some activity as an antihistamine as well as some anticholinergic activity. The drug binds non-selectively to many targets, including serotonin, dopamine, adrenergic, histamine, and muscarinic acetylcholine receptors. Besides its serotonin 5-HT2 receptor antagonism, pizotifen is a low-potency moderate-efficacy partial agonist of the serotonin 5-HT1A receptor. Pizotifen is able to dose-dependently and fully antagonize the discriminative stimulus effects of the serotonin–norepinephrine–dopamine releasing agent and serotonin 5-HT2 receptor agonist MDMA in rodent drug discrimination tests. Conversely, the related drug cyproheptadine was only partially effective and clozapine was ineffective. All three of these agents, pizotifen, cyproheptadine, and clozapine act as non-selective monoamine receptor antagonists. Pizotifen also fully blocks the effects of serotonergic psychedelics, including LSD, mescaline, 5-MeO-DMT, and DOM, in drug discrimination tests. The antimigraine activity of pizotifen might be specifically due to serotonin 5-HT2B receptor blockade.

Pharmacokinetics The elimination half-life of pizotifen is 23 hours.

Chemistry Pizotifen is a tricyclic compound and is specifically a benzocycloheptene. Close analogues of pizotifen include ketotifen and cyproheptadine, among others.

History Pizotifen was first described in the literature by 1964.

Society and culture

Names Pizotifen is the generic name of the drug and its INNTooltip International Nonproprietary Name and BANTooltip British Approved Name, while pizotyline is its USANTooltip United States Adopted Name. Brand names of pizotifen include Sandomigran, Mosegor, and Litec, among others.

Availability Pizotifen is available widely throughout the world, including in Europe.

References

External links Sandomigran drug data sheet

Illustrations

Worked examples

Example 1 — a first encounter with Pizotifen

Start with the simplest possible case. Write down what Pizotifen 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 Pizotifen 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 Pizotifen 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 Pizotifen

In research: Pizotifen 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 Pizotifen 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: Pizotifen is common in secondary-school and first-year university syllabi. It links to neighbouring topics 5-HT1A agonists, 5-HT2 antagonists, Alpha-1 blockers, so understanding it makes those chapters shorter.
In everyday life: Look for Pizotifen 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 Pizotifen in 20 minutes

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

Frequently asked questions

What is Pizotifen in simple terms?

Why does Pizotifen 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 Pizotifen?

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 Pizotifen.