TheiCal-D3 1000MG/880 IU Chewable - 30 Tablets

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What is TheiCal-D3?

TheiCal-D3 chewable tablets are a supplement which contains vitamin D3 and calcium. They’re ideal for those who are at risk of vitamin D deficiency, especially elderly people. These tablets can also be used to help support the treatment of osteoporosis, or brittle bones. These chewable tablets don’t need to be taken with food or a drink, and have a tasty orange flavour that makes them ideal for taking whenever, wherever.

Why does my body need vitamin D and calcium?

Vitamin D and calcium are essential nutrients which work together to support your bones, teeth, and muscles. Vitamin D helps to regulate the amount of calcium in your body, promoting healthy teeth and bones. If you have a calcium or vitamin D deficiency you could be at risk of developing a condition called osteomalacia, or rickets in children.

How much vitamin D and calcium are in these tablets?

Each TheiCal-D3 chewable tablet contains 2,500mg of calcium carbonate, which provides the equivalent of 1,000mg of calcium. They also contain 8.8mg of choleaciferol concentrate, which provides the equivalent of 880 I.U. of vitamin D3.

Can I take these tablets if I’m already taking medication?

If you’re taking any other medications, including those obtained without a prescription and herbal remedies, you should speak to your doctor or pharmacist before taking TheiCal-D3. This especially applies if you are already taking:

  • Cardiac glycosides, especially digitalis glycosides

  • Thiazide diuretics (water tablets)

  • Tetracycline antibiotics, e.g. doxycycline, tetracycline, minocycline

  • Sodium fluoride

  • Bisphosphonate

  • Cholestyramine

  • Laxatives such as liquid paraffin

  • Phenytoin or barbiturates

  • Glucocorticoids (cortisone)

  • Levothyroxine

  • Quinolone antibiotics, e.g. ciprofloxacin, norfloxacin, moxifloxacin

Can I take these tablets if I’m pregnant or breastfeeding?

If you’re pregnant or breastfeeding you should speak to your doctor or pharmacist before taking TheiCal-D3 tablets. This product may be right for you if you have a calcium or vitamin D deficiency, but you should follow a medical professional’s advice carefully to help you be sure that you’re doing the best thing for you and your baby.

How to take these chewable vitamin D3 tablets

Take one TheiCal-D3 tablet a day, chewing the tablet before swallowing. You can take the tablet with or without food, depending on how you’d rather take this product. If you’re pregnant and have been told to take this product by your doctor or pharmacist you should take half a tablet a day, and no more.

When should this product not be used?

TheiCal-D3 chewable tablets are not suitable for use in children. Do not take this product if you are allergic to calcium, vitamin D, or any of the other listed ingredients. This product is a food supplement and should not be used in place of a balanced diet or healthy lifestyle. Do not take this product if you have:

  • High levels of calcium in your blood (hypercalcaemia)

  • High levels of calcium in your urine (hypercalciuria)

  • Overactive parathyroid glands

  • Bone marrow cancer (myeloma)

  • Cancer which has affected your bones

  • A restraint of the limbs (prolonged immobilisation) along with high levels of calcium in your blood or urine

  • Kidney stones

  • Calcium deposits in your kidneys

  • Excessive supply of vitamin D

  • Severe kidney problems

Speak to your doctor or pharmacist before using this product if you:

  • Are going through long-term treatment, as your levels of calcium in your blood and urine will need to be checked regularly along with your kidney function. This especially applies to those who have a tendency to develop kidney stones

  • Are also taking cardiac glycosides or thiazide diuretics (water tablets)

  • Suffer from kidney problems

  • Take additional vitamin D or calcium supplements

  • Have sarcoidosis, an immune disorder which can affect your liver, lung, skin, or lymph nodes

  • Are immobile and are suffering with osteoporosis

Does TheiCal-D3 have any side effects?

Like all medications, TheiCal-D3 can have side effects although not everyone will experience them. These side effects include:

  • Symptoms of severe allergic reaction, e.g. swelling of the face, lips, tongue, or throat, difficulty breathing or swallowing, severe rash

  • Symptoms of allergic skin reaction, e.g. rash, itching, hives

  • Feeling sick, diarrhoea, abdominal (stomach) pain, constipation, wind (flatulence), bloating

  • High levels of calcium in your blood or urine

If you experience these or any other side effects while using this product, stop use and speak to your doctor or pharmacist. For more information about reporting the side effects of medication, please see the MHRA’s Yellow Card Scheme.

How to store this product

Store in a cool, dry place. Do not use this product if the expiry date printed on the original packaging has passed. Keep out of sight and reach of children.

Important information

This product is a medicine; make sure to speak to your doctor or Chemist 4 U pharmacist before taking this product if you have an underlying medical problem or are taking any other medicine or complementary therapy. If your symptoms get worse or continue after taking this product, contact us or your doctor. For medical services in your area, please refer to

If you are pregnant, trying to become pregnant, or breastfeeding, speak to your doctor or our pharmacist before taking this product. If you suffer from any allergies, ask your doctor or our pharmacist if this medicine is right for you.

Store all medicines out of sight and reach of children.

Please read the included leaflet carefully before using this product.

Please contact your GP if appropriate regarding this product.


Helpful Advice on Medication Restrictions & Addiction

For further information on our medication restrictions policy, please click here.

If you are concerned about addiction of 'over the counter' medication we urge you to visit the below links for professional help and advice:


  • The active substances are calcium and colecalciferol. Each chewable tablet contains 2,500 mg of calcium carbonate (equivalent to 1,000 mg of calcium) and 8.8 mg of colecalciferol concentrate (powder form) (equivalent to 22 micrograms of colecalciferol = 880 IU of vitamin D3).

    The other ingredients are isomalt (E953), xylitol, sorbitol (E420), citric acid, anhydrous, sodium dihydrogen citrate, magnesium stearate, carmellose sodium, flavour orange “CPB” and flavour orange “CVT” (which both contain sorbitol (E420)), aspartame (E951), acesulfam potassium, sodium ascorbate, all-rac-alpha-tocopherol, modified (maize) starch, sucrose, triglycerides medium chain and silicon dioxide colloidal

Drug Data
Product Type
Brand Information
Brand Name
Product Data
Days Supply
30 Tablets

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MethodHandling TimeTransit TimeTimescaleApprox Cost
Standard Shipping (3-5 Working Days)123£2.95

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Shipping Costs

Free UK Delivery on all orders over £30* - Delivery within 3-5 working days.

Standard UK Delivery - £2.95* - Delivery within 3-5 working days.

Express UK Delivery - £4.95** - Delivery within 1-2 working days.

Temperature Controlled Delivery - £8.85 - Delivery within 1-3 working days.

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TheiCal-D3 1000MG/880 IU Chewable - 30 Tablets Reviews

Joanne Edwardes,
Easily dissolve on the tongue, and pleasant tasting.