Medication and Your Care Team

Read this part first

One more thing worth saying plainly, because a lot of people carry it quietly. Needing medication is not a sign that you failed at diet and exercise. Type 2 diabetes is progressive for many people regardless of how well they eat, and insulin-producing capacity declines for reasons that have nothing to do with effort. Treating medication as a moral defeat leads people to delay something that would have helped them.

Metformin

The most commonly prescribed first medication for type 2 diabetes, and one of the most studied drugs in existence.

It works mainly by reducing the amount of glucose your liver releases, and by improving how sensitive your tissues are to insulin. Notably, it does not push your pancreas to make more insulin, which is why it is not typically associated with causing low blood sugar on its own.

Digestive side effects are common when starting and often settle. Prescribers frequently begin at a low dose and increase gradually, and extended-release forms exist partly for this reason. If side effects are making it hard to continue, that is information your prescriber wants, because there are usually options.

GLP-1 receptor agonists

The class that includes semaglutide and tirzepatide, among others, and the reason diabetes medication has been in the news for several years.

GLP-1 is a hormone your gut releases when you eat. It prompts insulin release when glucose is present, reduces the release of glucagon, slows how quickly your stomach empties and increases fullness. These medications mimic or extend that signal. The effect on appetite and weight is why they have attracted so much attention beyond diabetes.

They are not appropriate for everyone, they have side effects and contraindications, and availability and cost vary considerably. All of that is prescriber territory.

The other main classes, briefly

SGLT2 inhibitors

Cause the kidneys to pass some glucose out in urine rather than reabsorbing it. Also studied for effects on heart and kidney outcomes, which is part of why they are prescribed.

Sulfonylureas

Prompt the pancreas to release more insulin. Effective and long-established, but because they increase insulin regardless of your current glucose, low blood sugar is a recognised risk that needs discussing.

DPP-4 inhibitors

Slow the breakdown of your own GLP-1, giving a milder version of the effect described above, taken as a tablet.

Insulin

Replacing or supplementing the insulin your body produces. Used in type 2 diabetes when other approaches are not achieving what is needed. Being prescribed insulin is not a verdict on your past behaviour.

Food still matters on medication

A reasonable question: if a medication handles the glucose, does any of the rest of this handbook still apply?

Yes, for two reasons. Medication and food act on the same system from different directions, so what you eat still changes what your medication has to absorb. And the things in chapters 3 to 6 affect more than glucose: energy through the day, blood pressure, lipids, sleep, how you feel at 3pm.

The framing that tends to help is that medication changes the baseline and food changes the day. Neither replaces the other.

Questions worth taking to your appointment

• What is this medication doing, mechanically, and what should I expect to notice?
• Can it cause low blood sugar, on its own or combined with anything else I take?
• What are the common side effects, how long do they usually last, and at what point should I call you?
• Should I be testing at home while I take this, and when?
• What is my sick-day plan if I cannot keep food down?
• What would make you want to change this, and when would we review it?
• Does this interact with anything else I take, including supplements?

If appointments feel rushed, writing these down beforehand genuinely helps. So does bringing your own notes on what you have been seeing at home, which is one of the more useful things a log gives you.