Adverse Drug Reaction Classification System

Pharmaceutical Information
Drug Name Phentermine
Drug ID BADD_D01756
Description Phentermine is a sympathomimetic amine anorectic agent and it was introduced in 1959 as part of an anti-obesity combination drug.[A174361, A174364] It is chemically related to amphetamine and it is commonly referred to as an atypical amphetamine.[A174370] Phentermine has not been reported an addictive potential which allows this agent to be classified under the Schedule IV drugs (low abuse potential).[A174367] Phentermine was FDA approved for short-term weight management in 1959 and it became widely used in 1960. This initial product, formed by the combination of phentermine with [fenfluramine] and [dexfenfluramine] was discontinued after finding several reports of abnormal valves in nearly 30% of the consumers.[A174376, T403] Later on, phentermine was approved alone and in combination with topiramate in 2012 as a new alternative that required lower doses of phentermine to obtain the desired effect.[A174373]
Indications and Usage Phentermine is indicated, alone or in combination with topiramate, as a short-term adjunct, not pass a few weeks, in a regimen of weight reduction based on exercise, behavioral modifications and caloric restriction in the management of exogenous obesity for patients with an initial body mass index (BMI) greater than 30 kg/m2 or greater than 27 kg/m2 in presence of other risk factors such as controller hypertension, diabetes or hyperlipidemia.[FDA label] Exogenous obesity is considered when the overweight is caused by consuming more food than the person activity level warrants. This condition commonly causes an increase in fat storage. It is an epidemic condition in the United States where over two-thirds of adults are overweight or obese and one in three Americans is obese. In the world, the incidence of obesity has nearly doubled.[A174391]
Marketing Status approved; illicit
ATC Code A08AA01
DrugBank ID DB00191
KEGG ID D05458
MeSH ID D010645
PubChem ID 4771
TTD Drug ID D0U0RZ
NDC Product Code Not Available
UNII C045TQL4WP
Synonyms Phentermine | Duromine | Phentermine Hydrochloride | Hydrochloride, Phentermine | Adipex-P | Adipex P | AdipexP | Ionamine
Chemical Information
Molecular Formula C10H15N
CAS Registry Number 122-09-8
SMILES CC(C)(CC1=CC=CC=C1)N
Chemical Structure
ADRs Induced by Drug
*The priority for ADR severity classification is based on FAERS assessment, followed by the most severe level in CTCAE rating. If neither is available, it will be displayed as 'Not available'.
**The 'Not Available' level is hidden by default and can be restored by clicking on the legend twice..
ADR Term ADReCS ID ADR Frequency (FAERS) ADR Severity Grade (FAERS) ADR Severity Grade (CTCAE)
Coagulopathy01.01.02.0010.000164%Not Available
Colitis ischaemic24.04.08.012; 07.08.01.0040.000655%Not Available
Completed suicide19.12.01.001; 08.04.01.0100.000109%Not Available
Confusional state19.13.01.001; 17.02.03.0050.000327%
Constipation07.02.02.0010.000720%
Cough22.02.03.0010.000295%
Delirium19.13.02.0010.000109%
Dependence19.07.06.008--Not Available
Depressed level of consciousness17.02.04.0020.000109%
Dermatitis23.03.04.002--Not Available
Diarrhoea07.02.01.001--
Diarrhoea haemorrhagic24.07.02.004; 07.02.01.0020.000109%Not Available
Dizziness02.11.04.006; 24.06.02.007; 17.02.05.003--
Drug abuse19.07.06.0100.000382%Not Available
Drug ineffective08.06.01.0060.004486%Not Available
Drug interaction08.06.03.0010.000164%Not Available
Dry mouth07.06.01.0020.000928%
Dysarthria19.19.03.001; 17.02.08.0010.000164%
Dysgeusia17.02.07.003; 07.14.03.0010.000371%
Dyspepsia07.01.02.001--
Dysphagia07.01.06.0030.000109%
Dysphoria19.04.02.004--Not Available
Dyspnoea02.11.05.003; 22.02.01.0040.000655%
Dyspnoea exertional02.11.05.005; 22.02.01.005--Not Available
Euphoric mood19.04.02.006--
Eye haemorrhage12.02.02.012; 24.07.05.002; 06.07.02.0010.001299%Not Available
Eye pain06.08.03.0020.001299%
Fatigue08.01.01.0020.000731%
Fear19.06.03.0010.000109%Not Available
Feeling cold08.01.09.0080.001354%Not Available
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