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Pemirolast Side Effects

The most commonly reported side effects of pemirolast include diarrhoea, fall, and pyrexia, based on 95 FDA adverse event reports from 2004 to 2025.

Pemirolast side effects

Percentages show how often each reaction appears relative to total reports for pemirolast.

1
Diarrhoea12.6%12
2
Fall10.5%10
3
Pyrexia9.5%9
4
Fatigue8.4%8
5
Constipation7.4%7
6
Dyspnoea7.4%7
7
Asthenia7.4%7
8
Somnolence5.3%5
9
Thrombocytopenia5.3%5
10
Confusional State5.3%5
11
Condition Aggravated4.2%4
12
Pain4.2%4
13
Vomiting4.2%4
14
Disease Progression4.2%4
15
Renal Failure4.2%4

These are voluntary reports and do not establish that pemirolast caused these reactions.

Report severity

93.7%Serious89 reports
55.8%Hospitalizations53 reports
16.8%Fatal16 reports

Seriousness is determined by the reporter, not by OpenClaim.

Pemirolast drug interactions

Other drugs that appear in adverse event reports alongside pemirolast. Drugs flagged as a suspected cause appear in the first column. Drugs taken at the same time but not suspected appear in the second.

Also suspected

1
Venetoclax6.3%6
2
Pembrolizumab4.2%4
3
Raltegravir-potassium4.2%4
4
Nevirapine4.2%4
5
Adalimumab4.2%4
6
Denosumab4.2%4
7
Theophylline3.2%3
8
Lenalidomide3.2%3
9
Dexamethasone3.2%3
10
Azacitidine3.2%3
11
Aminophylline2.1%2
12
Betamethasone2.1%2
13
Imiglucerase2.1%2
14
Fentanyl2.1%2
15
Tamsulosin-hydrochloride2.1%2

Taken alongside

1
Atorvastatin-calcium17.9%17
2
Amlodipine10.5%10
3
Omeprazole9.5%9
4
Levothyroxine-sodium9.5%9
5
Allopurinol9.5%9
6
Prednisone8.4%8
7
Lorazepam8.4%8
8
Esomeprazole8.4%8
9
Ergocalciferol8.4%8
10
Quetiapine-fumarate8.4%8
11
Zolpidem-tartrate7.4%7
12
Rosuvastatin7.4%7
13
Acetaminophen6.3%6
14
Aspirin6.3%6
15
Clopidogrel-bisulfate6.3%6

Co-occurrence in adverse event reports does not establish a drug interaction. Patients often take multiple medications, and these lists reflect prescribing patterns rather than causal relationships. Consult a healthcare provider about potential drug interactions.

Who reports pemirolast side effects

47.4% of pemirolast adverse event reports involve female patients and 48.4% involve male patients. The largest age group is elderly at 67%. These figures reflect who reports side effects, not underlying risk.

Sex

Female47.4%
Male48.4%
Unknown4.2%

Age group

< 22.8%
2–116.9%
12–170.0%
18–6423.6%
65+66.7%

What is pemirolast used for

Conditions and purposes for which patients were taking pemirolast when the adverse event was reported.

Angle Closure GlaucomaAnticipatory AnxietyAnxietyAsthmaAnxietyAnxiety DisorderChronic SinusitisConjunctivitis AllergicDepressionDry EyeDepressionGlaucomaHypersensitivityInsomniaMajor Depression

Showing 15 of 22 indications

Pemirolast brand names and reporting trend

Pemirolast is sold under the brand name Alamast.

Brand names

Alamast88

Quarterly reports (20042025)

20042010201520202025

An upward trend reflects increased FAERS reporting overall, not necessarily increased risk.

Taking pemirolast with another medication?

Ask OpenClaim about your specific drug combination. Get a sourced report using FDA data, drug labels, and medical literature.