Why do you take some medications in the morning and others at night?

Before breakfast: when food affects absorption

Levothyroxine replaces a thyroid hormone that your body does not make in sufficient amounts. It is usually taken with water in the morning, at least 30 minutes before breakfast or a drink containing caffeine, such as tea or coffee. Food and caffeinated drinks can reduce how much levothyroxine your body absorbs.

For example, if you usually have breakfast and your first cup of tea at 7.30 am, taking the tablet at 7.00 am leaves a 30-minute gap. Taking it with your first bite of toast does not. Both count as “morning”, but only the first leaves time before you eat.

With breakfast: protecting your stomach and your sleep

Prednisolone is a steroid used to treat inflammation. If you have been prescribed one dose each morning, it is usually best to take it with breakfast. The food helps reduce stomach irritation, while taking the dose early makes it less likely to disturb your sleep.

Two medicines labelled “take in the morning” may therefore belong at different points in your routine: one before breakfast, the other with breakfast. If you take several medicines, your pharmacist can explain which you can take together and which need a gap between them.

Earlier in the day: avoiding night-time trips to the toilet

Furosemide is a diuretic, sometimes called a water tablet. It helps your body get rid of excess fluid by making you pass more urine. If you take it late in the day, you may have to get up several times in the night to use the toilet.

A once-daily dose is usually taken in the morning. If you take it twice a day, you may be advised to take the second dose around lunchtime. If that is difficult because of work or a long journey, speak to your pharmacist or GP before moving or missing a dose.

In the evening: why timing matters for some statins

Your liver makes cholesterol throughout the day, but production tends to peak at night. Simvastatin slows cholesterol production and acts for a relatively short time. It is usually taken in the evening so that its effect overlaps with that overnight peak.

Other statins work for longer. Atorvastatin and rosuvastatin tablets can generally be taken in the morning or evening. If your prescription allows either, choose a time that is easy to remember each day. Two people can both be taking a statin for high cholesterol and have different instructions about when to take it.

What if the prescribed time does not suit you?

If you work night shifts, often skip breakfast or have several tablets to fit into your day, try asking your pharmacist: “For this medicine, what matters most: the time of day, whether I take it with food, or taking it at the same time each day?” Give the exact name of the medicine and explain when you usually eat and sleep. Your pharmacist can then tell you which instructions matter and whether there is room to adjust the timing.

If you realise in the evening that you forgot your morning tablet, check the missed-dose section of the patient information leaflet or ask your pharmacist. What to do depends on the medicine and how soon your next dose is due. Do not automatically take two doses to make up for one you missed.