Ozempic and Constipation: How to Manage It Effectively

Constipation is one of the four most common side effects of Ozempic, affecting approximately 24% of participants in the STEP clinical trials at some point during treatment. Unlike nausea — which typically eases substantially by weeks 12 to 16 — constipation can persist throughout treatment if not actively managed.

The mechanism is straightforward and directly connected to how the drug works. Understanding it makes the management strategies obvious rather than arbitrary.

Why Ozempic Causes Constipation

Ozempic slows gastric emptying — the rate at which food moves from the stomach into the intestine. This effect, which creates the prolonged fullness that drives weight loss, also slows transit throughout the entire gastrointestinal tract.

When food moves through the colon more slowly, the colon has more time to absorb water from the stool. Less water in stool means harder, drier stool that is more difficult to pass. The same mechanism that makes you feel full longer also makes the downstream contents of your gut harder to move.

Additionally, Ozempic reduces total food intake significantly. Less food volume means less bulk to stimulate the natural wave-like contractions (peristalsis) that move stool through the colon.

Diet Strategies That Help

Fibre increase: Soluble fibre adds water-binding bulk to stool, making it softer and easier to pass. Focus on oats, psyllium husk, legumes, apples, and berries. Insoluble fibre (vegetables, whole grains) adds mechanical bulk and stimulates peristalsis.

The key is gradual increase. Adding fibre suddenly can worsen bloating and gas before the gut adapts. Increase by 5 grams per week.

Hydration: This is the single most neglected factor. Constipation on Ozempic is often partly dehydration — reduced food intake means less water coming in from food sources. The colon will draw water from whatever is available, including stool. Aim for two litres of water daily, more if physically active.

Prunes and dried fruit: Prunes contain sorbitol, a natural osmotic agent that draws water into the colon and stimulates movement. Two to four prunes daily can meaningfully improve stool consistency and frequency.

Reduce refined carbohydrates: White rice, white bread, and processed foods have very low fibre content and contribute to constipation without adding bulk.

Movement and Lifestyle

Daily walking stimulates gut motility through mechanical movement and autonomic nervous system changes. Even 20 to 30 minutes of brisk walking significantly improves bowel transit compared to a sedentary day.

Coffee, for those who tolerate it, stimulates colonic motility within 30 minutes of consumption. This is a reliable and convenient option for many patients.

When to Consider Pharmacological Help

If dietary and lifestyle measures do not resolve constipation after two to three weeks:

Polyethylene glycol (PEG/MiraLAX): An osmotic laxative that draws water into the colon. It is gentle, non-habit-forming, and suitable for regular use. It is the most commonly recommended first-line pharmacological option.

Bisacodyl or senna: Stimulant laxatives that increase colonic contractions. Effective but not recommended for daily long-term use.

Lactulose: An osmotic agent available as a liquid that is particularly effective for stubborn constipation.

Always discuss with your physician before adding any laxative to your Ozempic regimen, particularly if you have underlying GI conditions.

GLP-1 Pathway Programs and Digestive Adaptation

Any GLP-1 receptor activation — including through METASLIM sublingual GLP-1 drops — will slow gastric motility to some degree. During METASLIM's 8-week physician-guided program, the same constipation management strategies apply: increased water, soluble fibre, daily movement, and dietary adjustment. The METASLIM program's physician guidance covers digestive adaptation as part of the protocol.