Phentermine should always be taken exactly in the same as it is prescribed. Taking phentermine for a long duration of time and in a bigger amount can cause serious harm. Surveys prove that most people taking high doses of this medicine for a longer duration has developed acute skin problems, personality disorders, insomnia, hyperactive sensations.

Taking phentermine in the morning in an empty stomach before having breakfast provides the best effects of the medicine. A person taking phentermine 10-14 hours before going to sleep will also get good results. Swallowing the entire phentermine capsule is the only way of having the capsule. Crushing, breaking or chewing the capsule disrupts the working process of the medicine. The capsule is specially made for releasing the actual medicinal drug slowly into the body. If the capsule is damaged by chewing or breaking, a bigger amount of medicine flows into the body too quickly.

The medicine must be stored in a cool and dry place. In many occasions, the person taking the medicine against some proper prescription may have family members using phentermine as an addiction. So, having a check on the number of medicines left in the bottle is very necessary.

Withdrawal symptom is another major factor associated with this medicine. For avoiding these withdrawal symptoms, the dosage of phentermine must be reduced gradually before stopping the intake of the medicine. Prevention of withdrawal symptoms is not possible if a person stops taking the medicine suddenly without consulting a physician.