Facts on The Phentermine Weight Loss Drug

Phentermine is a prescription appetite suppressant drug clinically proven to aid in weight loss. It’s been around since the 1960s and has been extensively studied in the time since by physicians and specialists. This medication is one of the most well-studied medications on the market today.

Phentermine suppresses your appetite, so you eat less and lose weight as a result of that. It also boosts your metabolism, so food burns faster, and more calories are disposed of at rest or during exercise. The key ingredients in phentermine over the counter are the amphetamine-like stimulants d-amphetamine and phendimetrazine; and the opioid topiramate. These two ingredients together, with a medically acceptable dose of phentermine, produce the effects of appetite suppression and weight loss.

The most frequently reported negative side-effects with phentermine include sleepiness and dizziness—and although these are common side-effects, they should be more typically experienced with other medications as well. The drug is also known to cause a small number of serious side effects, such as high blood pressure, but people who take phentermine should check their blood pressure regularly.

Taking phentermine for weight loss can cause significant side effects. The drug does not allow your body to regulate its hormones properly but can also affect your mood. If you’re taking phentermine, you might notice you get more irritable or depressed when your dose is low. This effect is known as tolerance and can make you feel jittery or anxious as a result of the lower dosage. However, with continued medication use, this reaction fades away after about six months of consistent use.

Another potential side effect for individuals taking phentermine over the counter is that it has been known to cause heart problems and high blood pressure in some people who take it over three years or so. Other rare but potentially serious side effects of this medication include dry mouth, blurred vision, headaches, and constipation. Because fat cells are not being burned during weight loss as is normally the case with other medications for weight loss, your body will retain fat when you stop taking the drug. The reason for this is that your metabolism has been boosted by phentermine. When phentermine stops working in the system, your body does not have enough of the stimulants, and fat begins accumulating again.


Phentermine is associated with a higher risk for high blood pressure, heart attack, stroke, and death when taken for long periods of time. This drug is less effective than most diet pills as it offers comparatively little weight loss compared to the risks associated with its use.

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