Review: could Phentermine Hydrochloride cause Fatigue?


Fatigue is found among people who take Phentermine Hydrochloride, especially for people who are female, 30-39 old , have been taking the drug for 1 - 6 months, also take medication Pondimin, and have Pain . We study 868 people who have side effects while taking Phentermine hydrochloride from FDA and social media. Among them, 38 have Fatigue. Find out below who they are, when they have Fatigue and more.

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Phentermine Hydrochloride

Phentermine hydrochloride has active ingredients of phentermine hydrochloride. It is often used in weight loss. (latest outcomes from Phentermine hydrochloride 1,728 users)


Fatigue (feeling of tiredness) has been reported by people with breathing difficulty, pain, weakness, insomnia, stress and anxiety (latest reports from 231,716 Fatigue patients).

On Aug, 18, 2016

868 people reported to have side effects when taking Phentermine Hydrochloride.
Among them, 38 people (4.38%) have Fatigue

Number of reports submitted per year:

Could Phentermine hydrochloride cause Fatigue?

Time on Phentermine Hydrochloride when people have Fatigue *:

  • < 1 month: 25.0 %
  • 1 - 6 months: 41.67 %
  • 6 - 12 months: 16.67 %
  • 1 - 2 years: 16.67 %
  • 2 - 5 years: 0.0 %
  • 5 - 10 years: 0.0 %
  • 10+ years: 0.0 %

Gender of people who have Fatigue when taking Phentermine Hydrochloride *:

  • female: 81.58 %
  • male: 18.42 %

Age of people who have Fatigue when taking Phentermine Hydrochloride *:

  • 0-1: 0.0 %
  • 2-9: 0.0 %
  • 10-19: 0.0 %
  • 20-29: 11.54 %
  • 30-39: 34.62 %
  • 40-49: 30.77 %
  • 50-59: 19.23 %
  • 60+: 3.85 %

Severity if Fatigue when taking Phentermine Hydrochloride **:

  • least: 11.11 %
  • moderate: 33.33 %
  • severe: 44.44 %
  • most severe: 11.11 %

How people recovered from Fatigue **:

  • while on drug: 0.0 %
  • after off the drug: 0.0 %
  • not yet: 100 %

Top conditions involved for these people *:

  • Pain (6 people)
  • Hypertension (4 people)
  • Thyroid Disorder (3 people)
  • Smoking Cessation Therapy (3 people)
  • Bipolar Disorder (3 people)

Top co-used drugs for these people *:

  • Pondimin (14 people)
  • Fastin (11 people)
  • Synthroid (4 people)
  • Dicyclomine (4 people)
  • Antidepressants (3 people)

* Approximation only. Some reports may have incomplete information.

** Reports from social media are used.

How to use the study: print a copy of the study and bring it to your health teams to ensure drug risks and benefits are fully discussed and understood.

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NOTE: The study is based on active ingredients and brand name. Other drugs that have the same active ingredients (e.g. generic drugs) are NOT considered.

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