It can be described as a stimulant that can be likened to an amphetamine. Phentermine is also an appetite suppressant that affects the central nervous system.


It is used as a complement to exercise and diet in overweight people who risk having diabetes, high blood pressure and high cholesterol. Phentermine, like all other medicine, should not be shared with other people. However, phentermine is not to be used on expectant or nursing mothers. Other cases where phentermine should be avoided is if the patient has had heart problems such as heart failure, coronary artery disease, rhythm problems and stroke. It should not be given to a child younger than 16 years.

Other ailments that may bar phentermine use are:

  • Glaucoma.
  • Allergic.
  • Having a history of drug and alcohol abuse.
  • Pulmonary hypertension.
  • Overactive thyroid.
  • Patient in an agitated state.
  • Severe HBP.

It is risky to take phentermine alongside other diet medications like redux or phen-fen as it may cause a fatal lung disorder.

Phentermine and Pregnancy

It has been classified as Category X under the FDA pregnancy sections. This is because losing weight while you are pregnant can harm the baby. Apart from the unborn baby, phentermine can be passed into breast milk and hurt the baby. Either do not take phentermine while nursing or cut breastfeeding while on it.



All medicine should be taken exactly as the doctor prescribed. Some brands may be taken on an empty stomach. For instance, Suprenza disintegrating tablets may be taken without having eaten. The patient is to place the tablet in their mouth but not swallow it whole. Let it dissolve in your mouth. Do not chew. Phentermine should be taken earlier than 6 pm to avoid causing insomnia. If you feel the medication is not working appropriately, seek your doctor’s advice and do not alter dosage.

If you miss a dose, take it as soon as you remember but skip it if it is almost time for your next dose. In the case of an overdose seek medical attention as it could be fatal. Patients are advised to check that the medication forms on the dose buy bactrim ds online documents are relevant for the drug they are taking.

Dose Information


15-37.5mg orally once a day before breakfast or between one and two hours after breakfast.

*Paediatric (17 years or older) 15-7.5mg orally once a day before breakfast or

between one and two hours after breakfast.

Side Effects

They include:

  • Chest tightness.
  • Throat, tongue, face, feet and lips swelling.
  • Trouble breathing.
  • Wheezing.
  • Hives.
  • Severe mental changes.

Any of these and other serious effect are reason enough to call for emergency. Serious side effects are such as dangerously high blood pressure, seizure and pounding heartbeats.

Psychiatric effects of Phentermine include psychosis, libido changes, insomnia, impotence, depression, and hallucinations although the frequency is yet to be recorded.

The uncommon side effects are such as hearing, seeing and feeling things that are non-existent. Some side effects may not require medical attention. As the body gets used to the medication, the side effects may pass. A health care professional may help to reduce or stop the side effects. It is advisable to report any side effects that don’t seem to go away.


Although not often reported, there may be evidence of precordial pain, regurgitant cardiac valvular disease, HBP, angina, palpitations, cardiac arrest and failure, pulmonary hypertension andmyocardial infarction. Urticaria from hypersensitivity and Facial oedema and a skin rash may also be reported.


The side effects may include abdominal cramps, constipation, vomiting, unpleasant taste, nausea, diarrhea and dry mouth.

*Nervous system

The side effects on the nervous system may include fatigue, dizziness, overstimulation, euphoria, cerebrovascular events, restlessness, headache and tremor.

Other Medicine That Can Affect Phentermine

Taking phentermine with stimulant prescriptions may make you hyperactive or restless and worsen the effects as well. Talk to your doctor before taking phentermine with other stimulants or even diet pill and other medicine used to treat ADHD – Attention Deficit Hyperactivity Disorder.

Whether on Phentermine or not, the rule with taking medication still stands, that it is important to tell your practitioner what other drugs you are using, started to use or recently stopped. This is because the interactions may have other alternative effects. They may include over-the-counter medicine, herbal products, prescription drugs, vitamins as well.