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Dihydrotachysterol

vitamin D

Clinical author's note Michael Stewart 05/12/2022: AT10® oral drops were discontinued in the United Kingdom in January 2021. At the time of review there are no branded or generic products containing dihydrotachysterol available in the UK. Dihydrotachysterol may still be available in other countries. Other forms of vitamin D are available. This medicine leaflet is based on medical information available in the UK at the time of writing and is left here for reference purposes. Please also refer to the manufacturer's information supplied with your medicine.

Dihydrotachysterol is a type of vitamin D. It helps your body absorb calcium.

Make sure you understand how much to take and when to take it.

You will need to have regular blood tests while you are taking this medicine so that your doctor can make sure the dose is right for you.

Make sure you know the symptoms of too much calcium in your blood - these are losing your appetite, feeling thirsty, being sick (vomiting), feeling tired, and losing weight. See your doctor if you develop these symptoms.

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About dihydrotachysterol

Art des Arzneimittels

A type of vitamin D

Verwendet für

Low blood calcium levels due to hypoparathyroidism

Auch genannt

AT10® (discontinued)

Verfügbar als

Oral solution (drops)

Dihydrotachysterol is a form of vitamin D. Vitamin D helps you to absorb calcium from the foods you eat. You need calcium to keep your bones strong, and to help your muscles and nerves work properly. If you have a low level of calcium in your blood, it can cause a number of different symptoms, including muscle cramps, pain and twitching. Low levels of calcium can be caused by a problem with your parathyroid glands, called hypoparathyroidism. Dihydrotachysterol is used to treat low blood levels of calcium when caused by hypoparathyroidism.

Before taking dihydrotachysterol

Some medicines are not suitable for people with certain conditions, and sometimes a medicine may only be used if extra care is taken. For these reasons, before you start taking dihydrotachysterol it is important that your doctor knows:

  • If you are allergic to peanuts or soya. If so, you must not take this medicine.

  • Wenn Sie schwanger sind oder stillen.

  • If you have sarcoidosis. This is a condition causing inflammation, particularly in your lungs and lymph system. Sarcoidosis may make you more sensitive to dihydrotachysterol than normal.

  • Wenn Sie andere Arzneimittel einnehmen. Dazu gehören alle Arzneimittel, die Sie einnehmen und die rezeptfrei erhältlich sind, sowie pflanzliche und ergänzende Arzneimittel.

  • Wenn Sie schon einmal eine allergische Reaktion auf ein Arzneimittel hatten.

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How to take dihydrotachysterol

  • Before you start this treatment, read the manufacturer's printed information leaflet from inside your pack. The leaflet will give you more information about dihydrotachysterol and a full list of side-effects which you may experience from taking it.

  • Take dihydrotachysterol exactly as your doctor tells you to. It is likely you will be asked to take 3-5 ml for the first three days, and then your dose will be adjusted depending on the results of a blood test. You could then be asked to take a dose each day, on alternate days, or several times a week. Your doctor will tell you what is right for you, and how much to take for each of your doses.

  • Make sure you understand how to measure out your doses using the dropper. You can ask your doctor, nurse or pharmacist to explain this to you again if you are uncertain.

  • You can take dihydrotachysterol before or after meals.

  • Wenn Sie die Einnahme einer Dosis vergessen haben, nehmen Sie sie ein, sobald Sie sich daran erinnern, es sei denn, es ist fast Zeit für die nächste Dosis; in diesem Fall lassen Sie die vergessene Dosis aus. Nehmen Sie nicht zwei Dosen zusammen ein, um eine vergessene Dosis auszugleichen.

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  • Keep your regular doctor's appointments so your progress can be monitored. You will need to have regular blood tests while you are taking this medicine to make sure that the dose you are taking is correct for you.

  • You should consider wearing a MedicAlert® bracelet (or similar), or carry some kind of ID with you, to identify yourself as having hypoparathyroidism. This is so that if you collapse, are confused or are injured, doctors will know that you need prompt treatment with calcium.

  • Eating foods rich in vitamin D and calcium may help, such as oily fish (sardine, herring, salmon and tuna), liver, dairy products and eggs.

  • If you buy any medicines, check with a pharmacist that they are suitable for you to take with dihydrotachysterol.

  • Treatment with dihydrotachysterol is usually long-term. Continue to take it regularly unless you are advised otherwise by your doctor.

  • If you are having an operation or dental treatment, tell the person carrying out the treatment that you are taking dihydrotachysterol.

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Can dihydrotachysterol cause problems?

Along with their useful effects, medicines can cause unwanted side-effects although not everyone experiences them. Any side-effects caused by dihydrotachysterol are likely to be due to too much calcium in your blood, which means that your dose will need adjusting.

The first signs of too much calcium are:

  • Appetitlosigkeit.

  • Müdigkeit.

  • Unwohlsein (Übelkeit).

This could then lead on to:

  • Krank sein (Erbrechen).

  • Stomach cramps.

  • Ich habe Durst.

  • Needing to pass urine more often.

  • Schwitzen.

  • Schwindelgefühl.

  • Kopfschmerzen.

If you experience these symptoms, it is important that you make an appointment to see your doctor straightaway.

How to store dihydrotachysterol

  • Bewahren Sie alle Arzneimittel außerhalb der Reichweite und Sichtweite von Kindern auf.

  • An einem kühlen, trockenen Ort aufbewahren, vor direkter Hitze und Licht schützen.

  • Keep the bottle tightly closed and store in the original carton to protect it from light.

  • Discard any remaining contents four months after first opening the bottle. Write the date of opening on the label to remind you.

Wichtige Informationen über alle Arzneimittel

Wichtige Informationen über alle Arzneimittel

Never take more than the prescribed dose. If you suspect that you or someone else has taken an overdose of this medicine, go to the accident and emergency department of your local hospital. Take the container with you, even if it is empty.

Dieses Arzneimittel ist für Sie bestimmt. Geben Sie es niemals anderen Menschen, auch wenn deren Zustand derselbe zu sein scheint wie Ihrer.

Bewahren Sie abgelaufene oder nicht mehr benötigte Arzneimittel nicht auf. Bringen Sie sie zu Ihrer örtlichen Apotheke, die sie für Sie entsorgt.

Wenn Sie Fragen zu diesem Arzneimittel haben, wenden Sie sich an Ihren Arzt oder Apotheker.

Nebenwirkungen eines Medikaments oder Impfstoffs melden

Wenn Sie Nebenwirkungen feststellen, können Sie diese online über die Website der Gelben Karte melden.

Weiterführende Literatur und Referenzen

Artikel Geschichte

Die Informationen auf dieser Seite wurden von qualifizierten Klinikern verfasst und von Fachleuten geprüft.

  • Nächste Überprüfung fällig: 11. Dezember 2025
  • 12 Dez 2022 | Neueste Version

    Zuletzt aktualisiert von

    Michael Stewart, MRPharmS

    Peer-Review durch

    Sid Dajani
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