PharmaAccess
| Product | Quantity | Per Unit | Price | Buy |
|---|---|---|---|---|
| Miralax - 119g | 1 bottle | £19.00 | £21.11 £19.00 −10% | |
| Miralax - 119g | 2 bottle | £16.50 | £36.67 £33.00 −10% | |
| Miralax - 119g | 3 bottle | £15.67 | £52.22 £47.00 −10% | |
| Miralax - 119g | 4 bottle | £15.50 | £68.89 £62.00 −10% | |
| Miralax - 119g | 5 bottle | £15.00 | £83.33 £75.00 −10% |
This one barely counts as a drug in the usual sense.
Macrogol is a long inert polymer. It is not absorbed, not metabolised, and it does not act on any receptor. It passes through unchanged.
What it does do is hold onto water molecules. Strongly.
So the water you drink with it stays bound to the polymer instead of being reabsorbed through the bowel wall. It travels the whole length of the intestine and arrives in the stool.
Softer stool, larger volume, gentle natural stretch on the bowel wall, and normal contractions do the rest.
No stimulation of anything. Which is why there is no cramping and nothing for the bowel to become dependent on.
Stimulant laxatives work by prodding the nerves in the bowel wall. Used for months, the bowel becomes less responsive and people end up needing them to function.
Macrogol has nothing to become tolerant to. It is a physical effect, and it works the same way in week one and week fifty.
That makes it the usual choice for chronic constipation, for constipation caused by medication such as painkillers, for pregnancy, for children, and for older people.
This is where it goes wrong for people, and it is entirely avoidable.
Shortcutting the water is the classic mistake. The polymer works by holding water; if there is no water to hold, it does very little.
It is close to tasteless in plain water. Cold water, or mixing it into juice, makes it easier for people who dislike the texture.
It is not a same-night laxative. It typically takes one to three days to work properly, because the polymer has to travel the full length of the gut.
That slowness is the point — gradual and gentle rather than urgent. But it means taking a second dose on day one because nothing happened is a mistake.
For ongoing use, taking it daily at the same time works better than waiting until things have backed up.
And look at your medicine list. Iron, opioid painkillers, some antidepressants, certain blood pressure tablets and some antacids all cause constipation. Fixing the cause is better than treating around it.
Very well tolerated as a rule. If stools become too loose, reduce the dose rather than stopping entirely.
Those warrant finding the cause rather than increasing the dose.
Suited to months of regular use, which usually means buying a quantity that lasts rather than topping up constantly.
Pick the strength and the pack size, put in a delivery address, confirm. Couple of minutes, any time of day, no queue and no conversation across a counter.
It goes out in plain packaging. No pharmacy name on the outside, nothing that hints at what is inside. How long delivery takes depends on where the parcel is headed.
On price it comes down to strength and pack size. Larger packs generaly work out better per unit.
Parcels leave on working days, so UK public holidays and weekends push everything back. If it matters to a date, order with a few days to spare rather than none. Nobody can promise a calendar day.
Active ingredient: polyethylene glycol 3350. Polyethylene Glycol 3350 — MedlinePlus (NIH). Reviewed: 17 September 2026.
