Even though there are numerous advantages of Phentermine drug but at the same we cannot neglect the disadvantages. Of course there are some disadvantages and that are to be known to the patient so that he can be alert while opting for the Phentermine drugs.

There are mainly two major disadvantages of Phentermine and one of them is allergic reaction and the second one is minor symptoms that stay for shorter period. Out of these the first disadvantage of allergic reactions are considered to of serious nature. Following are some of the reactions that occur while taking Phentermine.

Breathing problems: This type of allergic reaction is mainly occurs in case of asthmatic patients. The obesity patient finds great difficulty in breathing after taking the Phentermine drugs because the heart beat is reduced due the appetite suppressant ingredient. In this case patients are advised to refer to the doctor immediately to avoid complications.

Swelling: In most of the cases the swelling of lips, face and other parts of face takes place. It happens due to irregular blood supply to these parts. Of course this swelling remains for shorter period but in this it is better to consult he it persists for longer duration.

High blood pressure: This is one of the major disadvantages of Phentermine drug and mostly found in more over weight people. In this case the obesity patients are advised to discontinue the Phentermine drug and consult the doctor immediately.

Problems in vision: As the face parts swells up this impacts the vision also. The patient suffers from blur vision and he is unable to see the objects clearly.

Abnormal heart beats: It happens due to high blood pressure and the patient feels uneasy. In this regard the high blood pressure patients should not opt for the Phentermine drug it may lead to dangerous situation.

Headache: It occurs due to abnormal flow of blood to various parts of the body especially the upper part of the body. This results in severe and frequent headache.

Throat problems: In this condition the patient feels and complains about the dry mouth in which the deficiency in secretion of saliva takes place. The patient feels difficulty in opening the throat. This is a temporary type of symptom but it is better to take advice from doctor if it stays for longer duration.

Clotting of blood or the rashes: These rashes are also called as hives and occurs due to the improper blood supply to various parts of the body.

All these are the major types of disadvantages of the Phentermine drug and the patients are advised to stop the medication immediately and consult the doctor.

The other minor symptoms or the side effects Phentermine drug are as follows.

Abnormal behavior of the obesity patient
Confusion in mind and problems in taking right decisions
Feeling uneasy and restlessness
Nervousness and heavy sweating
Abnormal stress levels and anxiety
Difficulty while sleeping that is insomnia
Change of taste in mouth and feeling dryness in mouth
Loose motion or constipation

Even though these are minor and temporary disadvantages or the side effects the Phentermine drug users are advised to consult doctor if they remain for longer duration. Do not neglect all these problems otherwise that will lead to major problems. It is always better to inform doctor about the medical history so that it becomes easy to take correct decision.