Itchy Skin From Phentermine

Phentermine often leads to weight loss, but it’s not a miracle drug that instantly makes you slim, svelte and healthy 4. It's used in conjunction with an overall weight-loss plan that includes exercise and change of eating habits — and it's only used when you’ve exhausted all other avenues for losing weight. The drug also comes with an array of warnings and side effects, one of which is itchy skin.


Phentermine, technically known as Adipex-P, is a stimulant often prescribed to those that are obese or severely overweight to help control their weight, and RX List explain 123. The drug, which is similar to an amphetamine, works to diminish your appetite as well as making your stomach feel full longer than it would without the drug.

Itchy Skin

Phentermine Skin Problems

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Itchy skin is one of the less-common side effects of phentermine 34. It can either be mildly uncomfortable or quite severe. Itchiness stems from an allergic reaction to the drug. Mild cases of itchy skin involve a general itchiness, while more severe cases sometimes include a skin rash or even hives.

  • Itchy skin is one of the less-common side effects of phentermine 3.
  • Itchiness stems from an allergic reaction to the drug.


If your skin breaks out into a rash, hives or the itchiness is particularly severe, suggests you see a doctor immediately. Your doctor can both treat the existing itchy skin condition as well as determine if you should continue to take the drug or perhaps switch to another medication or course of action for weight control.

Other Side Effects

Side Effects of Taking the Diet Pill Phentermine

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Itchy skin is not the only side effect associated with phentermine 34. Some of the more common side effects include a dry mouth, dizziness, headache and stomach ache, constipation or diarrhea and a change in your sex drive or impotence. Because it is a stimulant, phentermine often leads to nervousness, restlessness, having a hard time sleeping or not being able to sleep at all 4.

Other Warnings

Phentermine is potentially habit-forming, says, and is safest when you never exceed the prescribed dose 134. People with a history of alcohol or drug abuse are particularly at risk, as phentermine, too, has a high potential for abuse 4. Those that have a history of allergic reactions to other drugs, including stimulants, amphetamines, diet pills or even medications for colds, are at a higher risk of an allergic reaction to phentermine 34.