What Is Benzphetamine?

Benzphetamine hydrochloride is the generic name of Didrex, an anorectic drug used for the short-term treatment of exogenous obesity. This substance is a sympathomimetic amine, very similar to amphetamine, which stimulates the central nervous system and elevates blood pressure to suppress hunger and cravings. Benzphetamine can only be prescribed to individuals with an initial body mass index (BMI) of 30 kg/m2 or higher. Persons overweight by fifty pounds or less are not qualified to take this medication. The drug’s maximum prescription term is 12 weeks at the end of which an individual must have learned to incorporate behavioral changes towards the acquisition of a healthier weight management lifestyle. Benzphetamine is neither a lifetime nor a long-term weight loss pill. Obese patients under a weight loss strategy involving diet, exercise and benzphetamine, have lost slightly more weight during a certain period than those that have simply gone on a “diet and exercise only” regimen. Studies have shown, however, that the weight loss advantage is hardly significant at only a fraction of a pound more per week. Under U.S. FDA regulations, benzphetamine is classed as controlled substance under Schedule III. Under this category, “…abuse of the drug or other substance may lead to moderate or low physical dependence or high psychological dependence.”


A physician must prescribe benzphetamine because this drug can heighten certain health problems or create new ones if taken with contraindicated substances or under certain medical issues. People who have the following health predicaments are bad candidates for the drug:
  • Advanced arteriosclerosis or hardening of the arteries
  • Glaucoma
  • Hyperthyroidism
  • Moderate to severe hypertension
  • Moderate to severe anxiety problems
  • History of drug or alcohol abuse
  • Symptomatic cardiovascular disease
  • Allergies to sympathomimetic amines
  • Pulmonary hypertension
  • Valvular heart disease
Benzphetamine cannot also be prescribed to individuals taking MAO Inhibitor drugs or other anorectic agents, whether these are prescribed formulations or over-the-counter herbal preparations. Its combination with another anorexigenic substance could result in a potentially fatal side effect, pulmonary hypertension.

Pregnancy and Breastfeeding

Pregnant women and those planning a pregnancy should not take benzphetamine. The drug has been known to cause fetal damage. Breastfeeding mothers should not take the drug either because it is excreted in breast milk and has the potential to severely poison infants.

Adverse Reactions

The following reactions in these areas have been associated with the use of benzphetamine:
  • Cardiovascular – rise in blood pressure, palpitations or accelerated heart rate
  • Central Nervous System – severe headaches, dizziness, tremors, anxiety, restlessness, insomnia, excessive sweating, psychotic episodes (rare)
  • Gastrointestinal – nausea, vomiting, dryness in mouth, unpleasant taste, diarrhea, constipation
  • Allergic – hives and other allergic reactions of the skin
  • Endocrine — impotence

Other Things You Should Know

Ordering benzphetamine online without a valid prescription is grounds for violating the law on controlled substances; and justifiably so. The drug is dangerous when taken in ignorance of how it works, its contraindications and its side effects. The above list is not a complete list of warnings on the drug. A doctor’s prescription and medical monitoring is very important when taking benzphetamine. If you don’t feel like taking the risk of taking benzphetamine, you may want to point your health care provider to a safer, over-the-counter supplement called Phentramin-D. This weight loss aid requires no prescription but possesses powerful appetite suppressing and energy boosting qualities. It mimics another weight loss drug, phentermine, but does so with none or very minimal side effects. More information on Phentramin-D can be had here at