Diabetes treatment can feel confusing when a prescription contains several unfamiliar names. Learning what each medicine does can make it easier to ask questions, recognise side effects and follow your treatment plan safely.
The right treatment depends on the type of diabetes, glucose readings, kidney and heart health, risk of low blood sugar, pregnancy, cost and daily routine. A medicine that suits one person may not suit another. Healthy eating, physical activity, monitoring and regular follow-up remain part of care alongside medicines. NIDDK: diabetes treatments
This is general information, not an individual prescription. Do not start, stop, switch or change a diabetes medicine based on this article. Ask your diabetes team for a written plan for illness, fasting, missed doses and procedures.
Type 1 and type 2 diabetes need different treatment
People with type 1 diabetes need insulin because their body makes little or none. Tablets and GLP-1 medicines cannot replace that essential insulin.
For type 2 diabetes, treatment may include tablets, non-insulin injections, insulin or a combination. Some people need insulin at diagnosis because glucose is very high or they are unwell. Others need it later, temporarily during illness or surgery, or long term. Needing insulin is not a personal failure. NIDDK; American Diabetes Association: medicine options
Know the generic name as well as the brand
The generic name identifies the active medicine. The brand name is the name used by its manufacturer. The Indian brand examples below are for recognition, not recommendations or a ranking of products.
Always check every active ingredient, strength and release formulation on the pack. A similar brand name with an added suffix may contain two or three medicines. For example, Servier lists plain gliclazide products under Diamicron and gliclazide-plus-metformin products under Diamicron XR MEX. These are not interchangeable simply because the names look similar. Availability and formulations can change. Servier India product list
Common non-insulin medicine classes
1. Biguanide: metformin
What it does: Metformin reduces glucose production by the liver and helps the body respond better to insulin. It is a widely used type 2 diabetes medicine. By itself, it has a low risk of causing hypoglycaemia, or low blood sugar. ADA: medicine options
What to watch for: Nausea, diarrhoea and stomach discomfort are common, especially early in treatment. Longer-term use can reduce vitamin B12 levels. Tell your clinician about persistent tiredness, anaemia, tingling or numbness rather than assuming these are only due to diabetes. Lactic acidosis is rare but serious; severe kidney impairment and certain acute illnesses increase the risk. Kidney function should be checked, and dehydration, major illness or some contrast scans may require a clinician-directed temporary pause. NHS: metformin; MHRA: metformin and vitamin B12
Indian brand example: Glycomet, including specific metformin-only formulations. Check the full label because other products in the brand family contain additional medicines. NPPA: metformin product listings
2. Sulfonylureas: gliclazide, glimepiride and glipizide
What they do: These tablets encourage the pancreas to release more insulin.
What to watch for: Low blood sugar and weight gain are important risks. Missing or delaying meals, fasting without a treatment plan, alcohol and kidney problems can increase the chance of a hypo. Gliclazide may also cause stomach upset and is not suitable for some people with severe kidney or liver disease. NHS: gliclazide; Endotext: choosing type 2 diabetes medicines
Indian brand example: Diamicron for gliclazide, with immediate- and modified/extended-release products listed by the manufacturer. The release type matters. Servier India
3. DPP-4 inhibitors: sitagliptin, linagliptin, vildagliptin and teneligliptin
DPP-4 means dipeptidyl peptidase-4. These medicines prolong the action of the body’s own incretin hormones, helping insulin release when glucose is elevated. They are generally weight-neutral and have a low hypo risk when used without insulin or a sulfonylurea. ICMR: type 2 diabetes medicine classes
What to watch for: Headache and cold-like symptoms can occur with some products. Rare but important problems include pancreatitis, severe joint pain, serious allergy and blistering skin reactions. Several DPP-4 inhibitors need adjustment for kidney function; linagliptin generally does not. Heart-failure cautions differ between medicines, so the exact drug matters. DPP-4 inhibitors are generally not combined with GLP-1-based treatment because the combination adds little benefit. Sitagliptin prescribing information; ADA Standards of Care 2026
Indian brand example: Januvia contains sitagliptin. Apollo Pharmacy product listing
4. SGLT2 inhibitors: dapagliflozin, empagliflozin and canagliflozin
SGLT2 means sodium-glucose cotransporter-2. These medicines help the kidneys pass more glucose into urine. Certain medicines in this class also protect the heart or kidneys in appropriate patients, sometimes making them useful even when HbA1c is already near target. ADA Standards of Care 2026
What to watch for: Genital fungal infections, increased urination, dehydration and dizziness can occur. Kidney function, fluid balance and other medicines affect suitability. These medicines can rarely cause diabetic ketoacidosis even when glucose is not very high, called euglycaemic DKA. Illness, prolonged fasting, surgery, dehydration and insufficient insulin can increase this risk. They are not a substitute for insulin in type 1 diabetes. Ask in advance when to pause them for illness or a planned procedure. Dapagliflozin prescribing information
Indian brand example: Forxiga contains dapagliflozin. AstraZeneca India
5. GLP-1 receptor agonists: semaglutide, liraglutide and dulaglutide
GLP-1 means glucagon-like peptide-1. These medicines act on a gut-hormone pathway, increasing glucose-dependent insulin release, reducing glucagon, slowing stomach emptying and helping appetite control. They can lower glucose and support weight loss. Some have demonstrated cardiovascular benefits in specific patient groups. They are not insulin. Most are injections, but semaglutide is also available as a tablet. ADA: medicine options
What to watch for: Nausea, vomiting, diarrhoea or constipation are common. Persistent vomiting can cause dehydration. Severe, persistent abdominal pain, especially with vomiting, needs urgent assessment for pancreatitis or other serious causes. Tell the prescriber about gallbladder disease, severe delayed stomach emptying, existing diabetic eye disease or pregnancy plans. Some products, including semaglutide, are contraindicated with a personal or family history of medullary thyroid carcinoma or MEN2. These cautions are product-specific and require a prescription review. MedlinePlus: semaglutide; semaglutide prescribing information
Indian brand example: Rybelsus contains oral semaglutide. Its administration instructions are specific; follow the prescription and leaflet rather than treating it like an ordinary tablet. Tata 1mg product listing
6. Dual GIP/GLP-1 receptor agonist: tirzepatide
Tirzepatide acts on both glucose-dependent insulinotropic polypeptide (GIP) and GLP-1 receptors. It is a separate dual-action class, not insulin and not simply another name for semaglutide. It can lower glucose and support substantial weight loss. Digestive side effects are common, and hypo risk increases when combined with insulin or a sulfonylurea. Important cautions include pancreatitis, severe stomach-emptying problems, pregnancy and a personal or family history of medullary thyroid carcinoma or MEN2. Tirzepatide can also reduce the effectiveness of oral hormonal contraceptives when started or increased, so ask the prescriber about additional or alternative contraception. MedlinePlus: tirzepatide
Indian brand example: Mounjaro contains tirzepatide. Lilly India launch information
7. Thiazolidinediones: pioglitazone
Pioglitazone improves the body’s sensitivity to insulin. It can cause weight gain, ankle swelling and fluid retention, and can cause or worsen heart failure. Fracture risk and a history of bladder cancer also need discussion. New breathlessness, rapid weight gain or swelling should be reported promptly. MedlinePlus: pioglitazone
8. Alpha-glucosidase inhibitors: voglibose and acarbose
These medicines slow carbohydrate digestion in the intestine and reduce the rise in glucose after meals. Gas, bloating and diarrhoea are common; certain bowel diseases make them unsuitable. If low blood sugar occurs while they are combined with insulin or a sulfonylurea, glucose/dextrose is preferred over ordinary table sugar, whose breakdown is delayed. MedlinePlus: acarbose
Indian brand example: Voglitor MD contains voglibose. Other Voglitor products may be combinations. Torrent Pharmaceuticals product information
9. Meglitinides: repaglinide and nateglinide
These shorter-acting insulin-release stimulators help control glucose around meals. They can cause low blood sugar and weight gain. Meal timing matters, so ask for clear instructions if meals are skipped or delayed. Endotext: choosing type 2 diabetes medicines
Understanding insulin: basal, bolus and premixed
Insulin preparations differ in how quickly they start working and how long they last. Your team chooses a regimen to fit your glucose pattern, meals, daily activity and ability to monitor safely.
- Basal insulin supplies background insulin between meals and overnight. Examples include intermediate-acting NPH and longer-acting analogues such as insulin glargine or degludec. A pump can provide basal insulin through a steady delivery of rapid-acting insulin.
- Bolus or mealtime insulin covers glucose rises with meals. Examples include rapid-acting insulin aspart or lispro and short-acting soluble human insulin. Timing differs by product.
- Premixed insulin combines fixed proportions of mealtime and intermediate-acting insulin. It can simplify a regimen, but the two components cannot be adjusted separately and it usually requires more consistent meal timing.
Type 1 treatment generally needs both background and mealtime insulin, delivered by injections or a pump. Type 2 treatment may begin with basal insulin or use another plan when needed. Do not omit essential background insulin in type 1 diabetes when ill or not eating; contact your team for sick-day adjustments. ADA: insulin basics; MedlinePlus: insulin therapy; NHS: type 1 diabetes sick-day rules
Examples available in India include Lantus (insulin glargine), NovoRapid (insulin aspart) and Human Mixtard 30 (a premix of soluble human insulin and NPH/isophane insulin). Names, concentrations, devices and mixtures differ. Never substitute a pen, cartridge, vial or syringe without confirming that it matches your prescription. Sanofi India product list; Apollo: NovoRapid; Tata 1mg: Human Mixtard 30
Insulin can cause hypoglycaemia, weight gain and injection-site reactions. Repeated injections into the same spot can cause lumps and unpredictable absorption. Ask for a demonstration of injection technique, site rotation, storage and safe sharps disposal. MedlinePlus: insulin therapy
Low blood sugar: know what to do
Shaking, sweating, hunger, palpitations, dizziness, irritability or confusion can signal a hypo. For many adults, glucose below 70 mg/dL (3.9 mmol/L) needs treatment.
If you are awake and can swallow safely, use your agreed hypo plan. A common adult approach is 15 grams of fast-acting carbohydrate, preferably glucose, then recheck after 15 minutes. Repeat if still low, and have a meal or snack when recovered if appropriate. Children and some people using automated insulin systems may need a different plan. Frequent or persistent lows need a treatment review. ADA: recognising and treating hypoglycaemia
If someone is unconscious, having a seizure or cannot swallow safely, give nothing by mouth. Call emergency services immediately. Use prescribed glucagon if available and someone knows how to give it. CDC: treating low blood sugar
Warning signs that need urgent care
Go to an emergency department for repeated vomiting with abdominal pain, deep or rapid breathing, marked drowsiness, confusion or inability to keep fluids down. These can be signs of diabetic ketoacidosis (DKA) or another serious illness.
When taking an SGLT2 inhibitor, do not dismiss these symptoms because a glucose reading looks normal or only mildly raised. Suspected DKA requires immediate medical assessment; stop the SGLT2 medicine and seek urgent help. Do not stop insulin. MHRA: SGLT2 inhibitors and DKA
Make the next prescription review useful
Bring your medicine strips or a complete list, including supplements, and ask:
- What is each medicine for, and what side effects should I report?
- Which medicines can cause a hypo, and what is my rescue plan?
- Do my kidneys, heart, pregnancy plans or other conditions change the choice?
- What should I do during vomiting, fasting, travel or surgery?
- Is the plan affordable and practical enough for me to follow consistently?
The goal is a treatment plan you understand and can use safely, with regular review as your needs change.
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