
Alli is an over-the-counter weight loss medication that is clinically proven to work. It is the OTC version of the prescription weight loss drug orlistat, also known by the brand name Xenical. Alli contains 60 mg of orlistat, while Xenical contains 120 mg. The drug works by blocking the intestines from absorbing about 25% of the fat that is eaten, causing it to leave the body through bowel movements. This reduction in fat absorption leads to fewer calories being processed by the body, which can result in weight loss. While Alli has been shown to be effective for weight loss, it also has several side effects, including digestive problems, nutrient deficiencies, and potential interference with other medications.
| Characteristics | Values |
|---|---|
| Type | Over-the-counter (OTC) diet pill |
| Dosage | 60 mg |
| Active Ingredient | Orlistat |
| Working | Blocks absorption of dietary fat, reducing calorie intake |
| Effectiveness | Clinically proven to aid weight loss |
| Side Effects | Digestive issues, nutrient deficiencies, impaired absorption of vitamins A, D, E, K, and calcium, increased risk of kidney injury, liver injury (rare cases) |
| Precautions | Not suitable for pregnant or breastfeeding women, individuals with malabsorption issues, eating disorders, cholestasis, or liver health issues. Should be used with caution when taking other medications. |
| Administration | Oral, taken with or within an hour of meals containing fat |
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What You'll Learn

Alli is an over-the-counter weight loss pill
Alli has been shown to be effective in helping people lose more weight than dieting alone. It is clinically proven to work and is the #1 doctor-recommended over-the-counter weight-loss aid. However, it is important to note that Alli does have side effects, including digestive symptoms such as abdominal pain, diarrhoea, flatulence, and impaired nutrient absorption. It can also increase the risk of kidney injury and interfere with certain medications. Therefore, it is recommended to consult a doctor or health professional before taking Alli to ensure it is appropriate and safe for your specific health needs.
Alli is a weight loss aid that can be used by those who are struggling to lose weight through diet and exercise alone. It is important to note that Alli is not a quick fix, and it is recommended to be used in conjunction with a healthy diet and lifestyle. While Alli can help block the absorption of fat, it is still important to be mindful of fat intake and maintain a low-fat diet while taking this medication. This is because consuming high-fat meals while taking Alli can lead to uncomfortable digestive side effects.
Alli is a weight loss pill that has been approved by the Food and Drug Administration (FDA) and has helped many people on their weight loss journeys. It is available without a prescription, making it easily accessible to those who may benefit from it. However, it is important to carefully read and follow the label directions and be mindful of any potential side effects. Additionally, it is not suitable for everyone, and there are certain groups of people who should not use Alli, including those who are pregnant or breastfeeding, have had an organ transplant, or are not overweight.
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Alli blocks fat absorption
Alli is an over-the-counter weight loss medication that is clinically proven to work. It is a low-dose pharmaceutical drug that contains 60 mg of orlistat, while its prescription-only counterpart, Xenical, contains 120 mg. Alli is intended for overweight adults aged 18 and older who follow a reduced-calorie, low-fat diet.
Alli blocks about 25% of the fat you eat from being absorbed by the intestines. As a lipase inhibitor, Alli reduces the activity of enzymes that break down fats, causing about 25%-to-30% of dietary fat to bypass digestion and be expelled from the body. This leads to fewer calories being absorbed, which can result in weight loss.
The presence of undigested fat in the bowel can cause digestive symptoms such as abdominal pain, diarrhoea, flatulence, and loose, oily stools. Continued use of Alli can also impair the absorption of fat-soluble nutrients like vitamins A, D, E, and K, as well as calcium, leading to potential nutrient deficiencies. Taking a multivitamin at least two hours before or after taking Alli is recommended to mitigate this issue.
It is important to consult a doctor or registered dietitian before taking Alli, especially for individuals with medical conditions or those taking medications, as Alli can interfere with certain drugs. It is not suitable for individuals who are pregnant or breastfeeding and should not be taken by those with specific conditions like malabsorption, eating disorders, or cholestasis.
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Alli has side effects like digestive issues
Alli is an over-the-counter weight loss medication that is clinically proven to work. It contains 60 mg of orlistat, a lipase inhibitor that blocks about 25% of fat absorption in the body. While Alli is an effective weight loss aid, it is associated with several side effects, particularly related to digestion.
The most common side effect of Alli is loose stools and other bowel movement changes. This occurs due to the presence of undigested fat in the bowel, which can lead to abdominal pain, diarrhoea, flatulence, and even fecal incontinence. Some people may also experience an urgent need to use the bathroom and may notice a greasy or oily discharge. These symptoms typically occur during the first few weeks of treatment and may resolve on their own. However, it is important to consult a doctor if they become severe or persist.
In addition to digestive issues, Alli can also impair the absorption of fat-soluble nutrients such as vitamins A, D, E, and K, leading to nutrient deficiencies. It can also decrease calcium absorption, which, in combination with the unabsorbed fat, can increase the risk of kidney issues. Therefore, it is recommended to take a multivitamin at least two hours before or after taking Alli.
Furthermore, Alli may not be suitable for everyone. People with certain medical conditions, especially those impacting liver health, should consult a doctor before taking Alli. It is also not recommended for individuals with malabsorption issues, eating disorders, or cholestasis, a condition affecting bile flow from the liver. Additionally, Alli should be avoided by pregnant or breastfeeding women and children.
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Alli may cause nutrient deficiencies
Alli is an over-the-counter weight loss medication that is clinically proven to work. It is a low-dose pharmaceutical drug that contains 60 mg of orlistat, a lipase inhibitor. Lipase inhibitors work by blocking the absorption of fat in the intestines. This results in about 25% of the fat consumed passing through the body via bowel movements. As dietary fat is high in calories, this leads to fewer calories being processed by the body, which can aid weight loss.
However, the presence of undigested fat in the bowel can cause digestive symptoms such as abdominal pain, diarrhea, flatulence, fecal incontinence, and loose, oily stools. This can lead to an urgent need to use the bathroom and may cause leakage.
Additionally, continued use of Alli can impair the absorption of fat-soluble nutrients such as vitamins A, D, E, and K, leading to nutrient deficiencies. It can also decrease calcium absorption, which may lead to an increased risk of kidney injury. The unabsorbed fat binds with calcium in the digestive system, causing calcium oxalate crystal deposits to develop in the kidneys. Therefore, it is recommended to take a multivitamin at least 2 hours before or after taking Alli.
It is important to consult a doctor or registered dietitian before taking Alli, as it may not be suitable for everyone. It is also crucial to follow a low-calorie, low-fat diet while taking this medication to minimize digestive side effects.
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Alli interacts with certain medications
Alli (orlistat) is an over-the-counter weight loss medication that is clinically proven to work. It is intended for overweight adults who are following a reduced-calorie, low-fat diet. Alli works by blocking the intestines from absorbing about 25% of the fat that is eaten. The fats that are not absorbed leave the body through bowel movements.
Alli can interact with certain medications, affecting their levels or how they work in the body, which could lead to life-threatening consequences. It is always recommended to consult a doctor or another health professional before taking Alli, especially if you are taking other medications or have any medical condition. Here are some specific drug interactions and considerations to be aware of:
- Warfarin (a blood thinner): Alli can interact with warfarin, a commonly used blood-thinning medication. It is important to discuss with your doctor if you are taking warfarin before starting Alli.
- Diabetes medications: If you are taking medications for diabetes, it is crucial to consult your doctor before taking Alli. The interaction between Alli and diabetes drugs can impact their effectiveness or how they work in your body.
- Thyroid medications: Similar to its interaction with diabetes drugs, Alli can also affect the levels or action of thyroid medications. It is recommended to check with your doctor if you are taking thyroid hormones or related drugs.
- Weight loss drugs: Alli may interact with other weight loss medications. Combining Alli with other weight loss drugs should only be done under medical supervision to ensure safe and effective use.
- Organ transplant medications: Alli is known to interfere with drugs used to prevent transplant rejection, such as cyclosporine. If you have had an organ transplant and are taking anti-rejection medications, Alli may not be suitable for you.
- Pregnancy and breastfeeding: Alli is not recommended for individuals who are pregnant or breastfeeding. It is important to discuss other weight management options with your doctor if you are in this category.
These are some of the key considerations regarding Alli's interaction with certain medications. It is always advisable to seek personalized medical advice before taking Alli or any other medication to ensure it is safe and appropriate for your individual health needs.
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Frequently asked questions
Alli is an over-the-counter weight loss medication. It is a low-dose pharmaceutical drug that limits the amount of dietary fat absorbed by the body, reducing calorie intake and leading to weight loss. It is intended for overweight adults who are also following a reduced-calorie, low-fat diet.
Alli is a lipase inhibitor that blocks about 25-30% of the fat you eat from being absorbed by the body. This unabsorbed fat passes through the digestive system and is expelled, leading to a reduction in calorie intake. Alli also helps reduce visceral fat, which is linked to type 2 diabetes, high blood pressure, heart disease, and stroke.
Alli has several well-documented side effects, including digestive issues such as abdominal pain, diarrhea, flatulence, and fecal incontinence. It can also impair the absorption of fat-soluble nutrients, leading to deficiencies in vitamins A, D, E, and K, as well as calcium. Additionally, Alli may increase the risk of kidney injury and can interfere with certain medications. It is important to consult a doctor or health professional before taking Alli to ensure it is safe and appropriate for your individual needs.











































