Side Effects:
1. Dry mouth, unpleasant taste. Suck sugarless lozenges or hard candies, chew sugarless gum, and drink fluids.
2. Diarrhea, vomiting. If these effects are severe or persistent, contact your doctor.
3. Heart palpitations, restlessness, dizziness, tremor, insomnia. Contact your doctor.
How should I take phentermine?
Take this medication exactly as it was prescribed for you. Do not take the medication in larger amounts, or take it for longer than recommended by your doctor. Follow the directions on your prescription label.
Taking high doses of phentermine over long periods of time can cause severe skin problems, sleep problems (insomnia), personality changes, and feeling hyperactive or irritable. Take this medicine with a full glass of water. It is best to take phentermine on an empty stomach before breakfast, or at least 10 to 14 hours before bedtime.
Phentermine should be taken only for a short time, such as a few weeks.
Do not crush, chew, break, or open an extended-release capsule. Swallow the pill whole. It is specially made to release medicine slowly in the body. Breaking or opening the pill would cause too much of the drug to be released at one time.
You may have withdrawal symptoms when you stop using phentermine after using it over a long period of time. Do not stop using this medication suddenly without first talking to your doctor. You may need to use less and less before you stop the medication completely.
Do not take phentermine in the evening because it may cause sleep problems (insomnia).
Stop taking phentermine if you have increased hunger or if you otherwise think the medication is not working properly. Do not take more phentermine for an increased effect. Taking too much of this medication can cause serious, life-threatening side effects.
Phentermine may be habit-forming and should be used only by the person it was prescribed for. Keep track of how many pills have been used from each new bottle of this medicine. Phentermine is a drug of abuse and you should be aware if any person in the household is using this medicine improperly or without a prescription. Store phentermine at room temperature away from moisture and heat.
Indications and Usage for Phentermine
Phentermine hydrochloride tablets and capsules are indicated as a short term (a few weeks) adjunct in a regimen of weight reduction based on exercise, behavioral modification and caloric restriction in the management of exogenous obesity for patients with an initial body mass index ≥ 30 kg/m2, or ≥ 27 kg/m2 in the presence of other risk factors (e.g., hypertension, diabetes, hyperlipidemia).
Below is a chart of Body Mass Index (BMI) based on various heights and weights.
BMI is calculated by taking the patient’s weight, in kilograms (kg), divided by patient’s height, in meters (m), squared. Metric conversions are as follows: pound ÷ 2.2 =kg; inches x 0.0254 = meters.
| BODY MASS INDEX (BMI), kg/m2 |
| |
Height (feet, inches) |
Weight
(pounds) |
5’0” |
5’3” |
5’6” |
5’9” |
6’0” |
6’3 |
| 140 |
27 |
25 |
23 |
21 |
19 |
18 |
| 150 |
29 |
27 |
24 |
22 |
20 |
19 |
| 160 |
31 |
28 |
26 |
24 |
22 |
20 |
| 170 |
33 |
30 |
28 |
25 |
23 |
21 |
| 180 |
35 |
32 |
29 |
27 |
25 |
23 |
| 190 |
37 |
34 |
31 |
28 |
26 |
24 |
| 200 |
39 |
36 |
32 |
30 |
27 |
25 |
| 210 |
41 |
37 |
34 |
31 |
29 |
26 |
| 220 |
43 |
39 |
36 |
33 |
30 |
28 |
| 230 |
45 |
41 |
37 |
34 |
31 |
29 |
| 240 |
47 |
43 |
39 |
36 |
33 |
30 |
| 250 |
49 |
44 |
40 |
37 |
34 |
31 |
The limited usefulness of agents of this class should be measured against possible risk factors inherent in their use such as those described below.
Maximum Dosage Recommendations
Take Phentermine ONLY as directed by your doctor.
Do NOT take more of it
Do NOT take it more often, and
Do NOT take it for a longer time than your doctor ordered.
If too much Phentermine is taken, it may cause unwanted effects or become habit-forming.
Please speak with your doctor if you think that Phentermine is not working properly after you have taken it for a few weeks.
DO NOT increase the dose.
Ending Phentermine Treatment
Phentermine should NOT be used as a substitute for proper diet or exercise. For maximum effects, it must be used in conjunction with a reduced-calorie diet and/or exercise.
Any modifications in your diet, activity level, and behavior must be developed and continued long-term in order to continue losing weight and prevent the lost weight from returning.
As Phentermine is similar chemically to amphetamines, taking Phentermine may cause a positive result in urine screening tests for amphetamines.
Do NOT share your Phentermine prescription with others.
Consult your doctor or pharmacist for further information on Phentermine.
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