Best over the counter weight loss pills in 2025

Last updated: May 18, 2026

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Losing weight requires eating a balanced, low-calorie diet and adopting an active lifestyle. With time, you may see the number on the scale go down. But if your weight loss efforts aren’t working, one of the best over-the-counter weight loss pills may give you extra support. If not, you may consider a medically supervised weight loss program.

Over-the-counter (OTC) weight loss medications are available at drugstores, health food stores, grocers, and online. You can buy them without a prescription and use them on your own according to the instructions on the package. Still, talk to your doctor if you’re considering taking any supplement — whether a medication, herbal, OTC, pill, powder, or something else.

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To help guide your conversation, in this guide, we cover:

• What are the best OTC weight loss pills?
• Which over-the-counter weight loss pills work best?
• What to know about the side effects of OTC weight loss pills
• What to do if OTC weight loss pills don’t work for you
• How to find a professional weight loss provider

What are the best OTC weight loss pills?

OTC weight loss pills support weight loss in different ways. Some decrease appetite. Others reduce how much fat you absorb. In any case, you may have better luck losing weight by adding an OTC diet pill to your plan after talking to your healthcare provider.

Following are some of the top OTC weight loss pills.

Alli (orlistat)

Alli is the only over-the-counter medication that’s U.S. Food and Drug Administration (FDA)-approved for weight loss. It was approved in 2007 for weight management in overweight adults (18+) in conjunction with a low-fat, low-calorie diet. Orlistat, the active ingredient in Alli, is also available at a higher dose by prescription as the brand name Xenical.

How it works: Alli (orlistat) works by blocking the absorption of roughly 25% of fat in the foods you eat. By preventing fat from being absorbed, you naturally take in less fat and fewer calories.

How to take it: Alli comes in a 60-milligram capsule you take 3 times a day within an hour of each meal. The meals you take with Alli should include around 15 grams of fat. The manufacturer also recommends taking a multivitamin that includes fat-soluble vitamins (vitamins A, D, E, K, and beta carotene) once a day at bedtime while on Alli.

Effectiveness: One study found that users taking orlistat compared to those just dieting lost on average 5.5% of their starting weight over 24 weeks. 2.9% is 16.5 pounds for a 300-pound person.

Cost: At the time of publication, drugs.com shows a retail price for Alli of $55.82 for 90 capsules or a 1-month supply.

Common side effects: Orlistat can cause a few side effects, primarily involving the digestive system. You might experience oily stools or discharge, frequent bowel movements, or gas while taking Alli.

Garcinia cambogia

Garcinia cambogia extract is a popular supplement for weight management. Garcinia cambogia is a plant native to India and Southeast Asia. Garcinia cambogia supplements are made from the fruit pulp and rinds of the plant. The active chemical in Garcinia cambogia is hydroxycitric acid (HCA).

How it works: HCA supports weight loss due to its anorexigenic effect (loss of appetite), increased fat oxidation (breakdown), and regulation of endogenous lipid biosynthesis (turning fat into energy).

How to take it: Garcinia cambogia extract is available in several forms, including capsules, tablets, powders, and liquids. Follow the instructions on the product label if taking it.

Effectiveness: A meta-analysis of the effects of HCA used for obesity found a small, but statistically significant difference in weight loss when using HCA instead of a placebo. Though gastrointestinal adverse events were twice as common in the HCA group compared with the placebo group, the analysis concluded that Garcinia extracts/HCA can lead to short-term weight loss. Note that the amount was small and the clinical relevance uncertain.

Cost: The cost of garcinia cambogia supplements is roughly $16 for 120 capsules, which is about a 60-day supply. Costs vary by brand and store.

Common side effects: Side effects from Garcinia cambogia are generally mild and can include upset stomach, diarrhea, dry mouth, and headaches. Some uncommon, but sometimes severe cases of liver damage have been associated with the use of Garcinia cambogia products and products containing only Garcinia cambogia or both Garcinia cambogia combined with other ingredients.

Hydroxycut

Hydroxycut is the brand name for an herbal weight loss supplement that contains Robusta coffee extract from Coffae canephora robusta, essentially green coffee beans or green coffee extract (GCE).

In its original formula, Hydroxycut was banned in 2004 for severe side effects and later recalled for toxicity. Hydroxycut products were reformulated and are available today with different ingredients. Ephedra, a stimulant in the original formula, is no longer used in Hydroxycut products.

How it works: Hydroxycut’s active ingredient, Robusta coffee extract (green coffee extract), contains chlorogenic acid. Chlorogenic acid is believed to help with weight management by inhibiting an enzyme called glucose-6-phosphatase, which plays a role in how the body absorbs glucose (sugar). When glucose absorption is inhibited, the body may burn fat for energy instead.

How to take it: Hydroxycut products come in various forms: capsules, gummies, and drink mixes. Follow the instructions on the product label.

Effectiveness: A meta-analysis on the effects of green coffee extract found that it led to a significant decrease in body weight compared to controls. The authors noted that the quality of evidence was low and called for more rigorously designed studies.

Cost: Hydroxycut products vary widely in price depending on the formula and quantity. You can find a 60-count bottle of Hydroxycut Hardcore for around $20 to $30.

Common side effects: Hydroxycut’s current formula generally has mild side effects including jitteriness, nervousness, and gastrointestinal upset due to its caffeine content. Some people may experience insomnia if they take Hydroxycut close to bedtime.

PhenQ

PhenQ is a multi-action weight loss supplement that combines several ingredients purported to help with weight loss. Its primary ingredients include alpha-lipoic acid, caffeine, capsimax powder (a blend of capsaicin, piperine, caffeine, and niacin), chromium picolinate, and L-carnitine fumarate.

How it works: PhenQ works through multiple mechanisms. Caffeine acts as a stimulant to boost energy and reduce appetite. Capsimax powder may help increase thermogenesis (heat production in the body), which can help burn more calories. Chromium picolinate helps regulate blood sugar levels, which can help control cravings. L-carnitine fumarate helps the body convert fat stores into energy.

How to take it: According to the manufacturer, you should take one PhenQ pill with breakfast and one with lunch. Taking it after 3 pm is not recommended as it contains caffeine and may affect sleep.

Effectiveness: PhenQ has not been evaluated in a published clinical trial. The manufacturer cites some of the individual ingredients have been studied for their weight loss effects, but the specific PhenQ formula itself has not been independently tested.

Cost: At the time of publication, a one-month supply (60 pills) costs around $69.99 on the PhenQ website.

Common side effects: Side effects from PhenQ can include jitteriness, increased heart rate, headaches, nausea, and trouble sleeping — primarily due to its caffeine content.

Phengold

PhenGold is a dietary supplement that combines several natural ingredients to promote weight loss. Key ingredients include green tea extract, green coffee, L-theanine, L-tyrosine, Rhodiola rosea, cayenne pepper, and DMAE.

How it works: PhenGold’s combination of ingredients is claimed to boost metabolism and thermogenesis, reduce appetite and cravings, increase energy levels, and enhance focus and mental clarity. The green tea extract and caffeine from green coffee are the primary active components.

How to take it: The manufacturer recommends taking three capsules per day, around 20 minutes before breakfast.

Effectiveness: Similar to PhenQ, PhenGold itself has not been the subject of published clinical trials. Individual ingredients like green tea extract and caffeine have been studied for their potential weight loss effects.

Cost: At the time of publication, a one-month supply (90 capsules) costs around $59.99 on the PhenGold website.

Common side effects: Potential side effects include jitteriness, increased heart rate, headaches, and sleep disturbances due to the caffeine content.

What over-the-counter weight loss pills work best?

Of all the OTC weight loss pills, Alli is the only one that’s FDA-approved for weight loss in overweight adults. The other supplements listed above have some evidence to support their use, but research is limited. Their effectiveness can vary between individuals, and the quality of research is often not as robust as that for prescription medications.

The best OTC weight loss pill for you will depend on your individual health situation, weight loss goals, and how your body responds to the supplement. It’s important to remember that even the most effective OTC weight loss supplements typically only result in modest weight loss, and they work best when combined with a healthy diet and regular exercise.

If you’re struggling to lose weight with diet and exercise alone, or if OTC weight loss pills aren’t providing the results you’re looking for, it may be time to consult a healthcare provider about more effective options, including prescription weight loss medications.

What to know about the safety and side effects of OTC weight loss pills

Unlike prescription medications, OTC supplements are not required to undergo rigorous testing to prove safety and effectiveness before going to market. This means the quality and safety of OTC supplements can vary considerably.

When considering OTC weight loss pills, there are several important safety considerations:

• Drug interactions: Some OTC weight loss supplements can interact with prescription medications. Always tell your doctor or pharmacist about any supplements you’re taking.
• Underlying health conditions: Some OTC weight loss supplements may not be safe for people with certain health conditions, such as heart disease, high blood pressure, or diabetes.
• Quality control: The FDA does not regulate the quality of dietary supplements in the same way as prescription drugs. Look for products that have been tested by third-party organizations like NSF International, USP, or ConsumerLab.
• Long-term safety: Most OTC weight loss supplements have only been studied for short periods. The long-term safety of many of these products is unknown.

Always consult a healthcare provider before starting any weight loss supplement, especially if you have underlying health conditions or are taking other medications.

What to do if OTC weight loss pills don’t work for you

If you’ve tried OTC weight loss pills and they haven’t provided the results you were hoping for, don’t despair. There are other options available, including prescription weight loss medications.

Prescription weight loss medications like Wegovy (semaglutide) and Mounjaro (tirzepatide) have been shown to be significantly more effective than OTC supplements. These medications work by mimicking hormones that regulate appetite and food intake, helping you feel full sooner and eat less.

These medications are only available by prescription and require medical supervision. A healthcare provider can evaluate your health history, discuss the potential risks and benefits, and determine if a prescription weight loss medication might be appropriate for you.

Find a healthcare provider on Klarity Health and start a tailored weight loss journey today

If you’re looking for a more effective weight loss solution, Klarity Health can connect you with a licensed healthcare provider who can discuss your options, including prescription weight loss medications if appropriate.

Our network of 2,000+ licensed providers offers same-day appointments, so you can get the help you need quickly. Whether you’re interested in exploring prescription weight loss options or simply want guidance on the best approach for your individual situation, our providers are here to help.

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