Oral medication, diet and insulin injections can aid in diabetes treatment and diabetes management.

Diabetes Management: How is Diabetes Mellitus Treated and Controlled?

Diet Management

Diet plays a huge role in diabetes management.

The good news is, if you know how to choose your food wisely, you may be able to control your diabetes with less or no medication at all. Meal planning is the cornerstone to good diabetes control.

Meal planning in diabetes aims to achieve:

  • As near normal a blood glucose level as possible to prevent and slow down the development of complications.
  • Adequate nutrition.
  • A healthy weight is important for good diabetes control.

Weight Management and Diabetes Mellitus

Use the Healthy Diet Pyramid for healthy meal planning to curb diabetes mellitus.

If you are overweight, you should try to lose some weight. A Body Mass Index (BMI) of between 18.5 to 23 is considered healthy.

Studies have shown that a 5 percent weight loss can remarkably improve diabetes control.

You can calculate your BMI using the following formula:

Body Mass Index (BMI) = Weight (kg) / [ Height (m) x Height (m) ]

Check your BMI with this BMI Calculator on HealthHub.

Related: Simple Weight Management Tips

Meal Planning for People with Diabetes Mellitus

A lady planning her future meals using a laptop and a notebook

You should eat a variety of foods in the correct proportion to meet your nutritional requirements.

The Healthy Diet Pyramid shows the different groups of food that you should include in your daily meal plan. You should eat more of the foods at the base of the pyramid and less of the foods at the top of the pyramid.

Use the Healthy Diet Pyramid for healthy meal planning to curb diabetes mellitus.


Carbohydrates are found in starches and sugars. Carbohydrates have a direct effect on your blood glucose levels.

To prevent your blood glucose from rising too high, foods containing carbohydrates should be:

  • Eaten in small frequent meals (three to six meals per day) throughout the day.
  • Eaten in consistent amounts at each meal.
  • Eaten at the correct time to match your medication and insulin regimen.

Rice and Alternatives (The Base of the Healthy Diet Pyramid)

These foods contain starches, and they are your main source of carbohydrates. You should eat a consistent amount of these foods in a meal and throughout the day.

To ensure that you eat a consistent amount, you will need to quantify your amount of carbohydrates.

Consult your dietitian for the amount that you need per day. To help you quantify the amount of carbohydrates, compare the amount of food you eat with one slice of bread.

The following foods are equivalent to one slice of bread:

  • Cooked noodles 1/3 rice bowl
  • Cracker biscuits 3 pieces
  • Cornflakes 1/3 rice bowl
  • Oatmeal 3 dessert spoon (before cooking)
  • Rice (cooked) 1/4 rice bowl

You should choose foods with a higher fibre content e.g., wholemeal bread instead of white bread.

Fruit and Vegetables

These foods provide you with antioxidants, essential vitamins and fibre. You should eat two servings of each per day.

Fruits and certain vegetables (see the list below) contain carbohydrates and should be eaten in a consistent amount.

The carbohydrate content of one serving of the fruit and vegetables listed below is equivalent to one slice of bread.


One serving:

  • Apple 1 medium
  • Banana 1 medium
  • Grapes 10 small
  • Orange 1 medium
  • Papaya 1 medium slice
  • Pear 1 medium
  • Pineapple 1 medium slice
  • 4 Rambutans
  • 5 Lychees


One serving:

  • Potatoes 90 g
  • Corn 1/3 medium
  • Carrot 1/3 medium
  • Sweet Potatoes 90 g
  • Yam 90 g
  • Tapioca 90 g

Dairy Products

Dairy products like milk and cheese are good sources of protein as well as calcium. You should take at least one cup a day. Milk contains carbohydrates, and one cup (300ml) is equivalent to one slice of bread. Choose milk with the lowest fat content, like skimmed and low-fat milk.

Meat and Alternatives

Meat and alternatives are important sources of protein. It does not directly affect your blood glucose levels. However, it contains saturated fats. So you should watch out for the fat content. You should eat two to three servings per day.

Choose only lean meat and poultry without skin, and limit the number of egg yolks to two per week.

Salt, Sugars and Fats

The foods found at the top of the pyramid should be taken sparingly.


Salt and sodium-rich products like sauces, preserved and canned foods have been linked to high blood pressure. Reduce the sodium in your diet by adding less salt and sauces in your cooking and using herbs and spices to flavour your food.


Sugars contain carbohydrates. Although studies have shown that sugar and sugar products can be included in your meal plan, it should be counted as a carbohydrate substitute.

Three teaspoons of sugar is equivalent to one slice of bread. However, one slice of bread will give you more nutrients than three teaspoons of sugar. So choose wisely.

If you have a sweet tooth and find it difficult to stop eating sweet things, artificial sweeteners can be used to sweeten your drinks.


Although fats do not directly increase your blood glucose levels, excessive intake will increase your weight and has an impact on your blood cholesterol levels.

Saturated fats like animal fats, certain types of vegetable oils like palm and coconut should be reduced as these fats increase your LDL cholesterol (bad cholesterol) levels.

Use unsaturated fats like olive or canola oils in cooking. Foods should be prepared with a minimum amount of fats.

Cooking methods like roasting, grilling or steaming rather than deep-frying are encouraged.

Consult Your Dietitian

You should consult your dietitian for your meal plan. Your dietitian will be able to advise you on the amount of carbohydrates you need per day and tailor your meal plan to fit into your lifestyle.

Related: Getting the Fats Right!


Exercise helps you maintain body weight and in turn, aids in diabetes prevention.

Besides choosing your food wisely, exercise will help you lose and maintain your body weight and increase the effectiveness of your insulin.

Related: Diabetes Management: Stay Healthy and Exercise!

Oral Medication for Diabetes Treatment

Oral medication is also administered for diabetes management.

Role of Oral Medication in Diabetes Management

If meal planning does not control your diabetes, your doctor may prescribe some tablets for you.

There are many different types of tablets available to treat Type 2 diabetes. These tablets are a tool to help you manage your blood glucose level in addition to the meal plan and exercise that you need to follow.

If both diet and tablets fail to control your blood glucose to the desired level, insulin injections may be needed.

Your doctor may have prescribed one of the following for you:


How does it work?

How should I take it?



  1. Glipizide (Minidiab®),Glibenclamide (Daonil®)
  2. Gliclazide (Diamicron®)
  3. Tolbutamide (Rastinon®)
  4. Glimepiride (Amaryl®)

Helps the pancreas to release more insulin.

Take the tablet(s) every day before meal(s).

Do not miss or delay meals.

Meglitinide Analogues


  1. Repaglinide (Novonorm®)
  2. Nateglinide (Starlix®)

Helps the pancreas to release more insulin.

Take the tablet(s) immediately before each main meal.

Biguanides e.g., Metformin (Glucophage®)

Helps the body to use insulin more efficiently.

Take the tablet(s) with the meal or after the meal.

Thiazolidinediones e.g., Roziglitazones (Avandia®)

Helps the body to use insulin more efficiently.

Take the tablet(s) before or after the meal.

Glucosidase inhibitors e.g., Acarbose (Glucobay®)

Helps to stop the quick rise of blood glucose after a meal.

Take the tablet(s)with the first mouthful or immediately before each of the three main meals.

What Precautions Should You Follow When Taking Diabetes Medicine?

Before taking your medicine, inform your doctor if:

  • You are allergic to this medicine or any other medicines.
  • You are taking any prescription or non-prescription medicines.
  • You have a heart, kidney or liver problem.
  • You are going for any surgery.
  • You are pregnant or planning to get pregnant.
  • You are breastfeeding.

What Must You Do While Taking the Diabetes Medicine?

  • Learn the name and dosage of your medicine.
  • Take your medication regularly and exactly as prescribed by your doctor.
  • Do not stop taking your medication without consulting your doctor.
  • If you miss a dose, take this missed dose as soon as you remember. If it is almost time for the next dose, take only the usual dose. Do not double the dose.
  • Test your blood glucose as directed by your doctor.
  • If you visit another doctor, be sure to tell him you are taking this medicine.
  • If you are taking Metformin, let your doctor know before any scan or X-ray procedure. You may need to stop taking it for a few days.

How Should You Store Your Diabetes Medicine?

  • Store in a cool, dry place.
  • Do not keep different types of medicines together in one container. Keep each medicine separately in its original labelled container.

What are the Possible Side Effects of the Diabetes Medicine?

Low Blood Glucose (Hypoglycaemia)

If you take your medicine but do not eat on time, your blood glucose may become too low. You may experience weakness, dizziness, hunger, sweating, trembling, blurred vision, unsteady gait or fast heartbeat.

Stomach Discomfort/Bloated Feeling or Gas/Diarrhoea

These symptoms may occur. Consult your doctor if any of these symptoms are severe or do not go away.

Skin Rash

Rashes may occur when you are taking these medicines. If you have rashes, inform your doctor immediately.

Rare Side Effects

If you have any of the following side effects, inform your doctor:

  • Dark-coloured urine.
  • Tiredness.
  • Light-coloured stools.
  • Unexplained fever and sore throat.
  • Increased sensitivity to sunlight.
  • Yellowing of eyes or skin.
  • Headaches.

Diabetes Management: Insulin Injections

If you have diabetes mellitus or type 1 diabetes, you need insulin injections.

Who Needs Insulin Injections?

A person with type 1 diabetes is dependent on insulin injections as his/her pancreas is unable to produce insulin.

In type 2 diabetes, there may be times (e.g., during illness, surgery or pregnancy) when the usual tablet treatment may not be effective and have to be temporarily replaced by insulin treatment.

In addition, many patients with type 2 diabetes do much better on daily injections, especially when tablets are no longer effective. This does not mean that their diabetes is worse. Insulin should only be used when prescribed by a doctor and adjustments of the dosage should be supervised.

Insulin cannot be taken by mouth because it is digested and destroyed by the stomach. Currently, the only way to receive insulin is by injection.

Types of Insulin for Diabetes Treatment

There are different types of insulin preparations which are based on:

  • How fast the injected insulin is absorbed into the blood (onset of action).
  • How long the insulin level takes to reach its peak (peak effect).
  • How long it takes for all injected insulin to be used (duration of action).


Trade Names







15 mins

1 - 2 hours

4 hours




1/2 - 1 hour

1 - 3 hours

4 - 8 hours




1 - 2 hours

4 - 12 hours

16 - 24 hours

Premixed (Short & Intermediate)

Humulin 30/70®

Mixtard 30/70®

1/2 hour

2 - 12 hours

16 - 24 hours



4 hours

8 - 24 hours

28 - 36 hours

How Do You Draw Out a Single Type of Insulin from a Vial for Your Diabetes Treatment?

  1. Wash and dry your hands.
  2. Roll the insulin vial (bottle) gently between the palms of your hands. This provides the dual benefit of mixing the insulin and warming it to body temperature to reduce the pain when injecting.
  3. Remove the coloured cap of the new vial.
  4. Clean the rubber stopper on the insulin vial with an alcohol swab.
  5. Take the syringe from the packet and remove the cap.
  6. Draw in air equal to the dose of insulin by pulling the plunger down.
  7. With the vial standing upright, insert the needle into the rubber stopper on the vial and push the plunger down. This pushes air into the vial, which makes it easier when withdrawing the insulin out of the vial.
  8. Turn the vial and syringe upside down. Slowly pull the plunger down about five units more than the required dose. If there are no bubbles, push the top of the plunger tip to the line, which marks the exact dose.
  9. Remove the syringe from the vial.
  10. If air bubbles are in the syringe, remove them by flicking or tapping the syringe where the bubbles are with your finger. When the bubbles rise to the top of the syringe, push the plunger tip up to the exact dose. It is important to get the air bubbles out of the syringe so that you have an accurate dose of insulin.
  11. You are now ready to give the injection.

How Do You Draw Out Two Types of Insulin for Your Diabetes Treatment?

  1. Wash and dry your hands.
  2. Roll the insulin vial gently between the palms of your hands. This provides the dual benefit of mixing the insulin and warming it to body temperature to reduce the pain when injecting.
  3. Remove the coloured cap of the new vial.
  4. Clean the rubber stopper on the insulin vial with an alcohol swab.
  5. Take the syringe from the packet and remove the cap.
  6. Draw in air equal to the dose of the cloudy insulin.
  7. Insert the needle in the cloudy insulin and inject air into the vial.
  8. Do not draw out cloudy insulin yet. Take the empty syringe out of the cloudy insulin vial.
  9. Draw in air equal to the dose of the clear insulin.
  10. Insert the needle into the clear insulin and inject air.
  11. Draw out the exact dose.
  12. Insert the needle into the vial of cloudy insulin. (Do not push in the plunger as this would inject clear insulin into cloudy insulin vial).
  13. To avoid air bubbles, slowly pull back the plunger to the exact unit marker for the total dose of clear and cloudy insulin as prescribed.
  14. Remove the syringe from the vial.
  15. You are now ready to give the injection.

How Do You Select a Site for Injection?

  1. Insulin should be injected into the subcutaneous tissue (between the skin and the muscle layer).
  2. The site for injection is important as the absorption of insulin varies from site to site. For example: abdomen (the fastest), arm (intermediate), thigh and buttock (the slowest).
  3. Rotate the injection site within one area to avoid developing “fatty lumps” or “hollow”.
  4. Avoid injections into areas that will be exercised, e.g., arm or thigh, when playing tennis.

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