OpenClaim

Dimethyl Side Effects

The most commonly reported side effects of dimethyl include flushing, nausea, and diarrhoea, based on 123,095 FDA adverse event reports from 2004 to 2025. 4.3% of reports found the drug to be ineffective.

Dimethyl side effects

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

1
Flushing13.9%17,112
2
Nausea7.4%9,073
3
Diarrhoea6.8%8,329
4
Multiple Sclerosis Relapse6.6%8,091
5
Fatigue5.7%7,032
6
Multiple Sclerosis4.6%5,720
7
Vomiting4.6%5,683
8
Memory Impairment4.5%5,569
9
Gastric Disorder4.5%5,554
10
Abdominal Pain Upper4.4%5,437
11
Drug Ineffective4.3%5,319
12
Headache4.2%5,117
13
Pruritus4.1%5,108
14
Fall4.1%5,055
15
Gait Disturbance3.8%4,649

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

Report severity

33.6%Serious41,331 reports
18.9%Hospitalizations23,226 reports
1.9%Fatal2,285 reports

Seriousness is determined by the reporter, not by OpenClaim.

Dimethyl drug interactions

Other drugs that appear in adverse event reports alongside dimethyl. 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
Dalfampridine6.6%8,106
2
Interferon2.2%2,713
3
Natalizumab1.7%2,088
4
Fingolimod0.6%697
5
Teriflunomide0.5%674
6
Ocrelizumab0.5%651
7
Glatiramer-acetate0.5%555
8
Diroximel-fumarate0.4%453
9
Peginterferon0.4%439
10
Tizanidine-hydrochloride0.2%267
11
Baclofen0.2%193
12
Gabapentin0.2%190
13
Rituximab0.2%185
14
Pregabalin0.1%165
15
Methylprednisolone0.1%160

Taken alongside

1
Ergocalciferol7.1%8,741
2
Baclofen5.2%6,420
3
Gabapentin4.9%6,011
4
Acetaminophen3.3%4,060
5
Aspirin3.3%4,024
6
Interferon3.1%3,767
7
Dalfampridine2.7%3,379
8
Levothyroxine-sodium2.5%3,058
9
Ibuprofen2.2%2,714
10
Omeprazole2.1%2,642
11
Cyanocobalamin1.9%2,380
12
Duloxetine-hydrochloride1.9%2,283
13
Lisinopril1.8%2,271
14
Atorvastatin-calcium1.8%2,165
15
Calcium1.8%2,160

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 dimethyl side effects

73.9% of dimethyl adverse event reports involve female patients and 20.1% involve male patients. The largest age group is adult at 90%. These figures reflect who reports side effects, not underlying risk.

Sex

Female73.9%
Male20.1%
Unknown5.9%

Age group

< 20.3%
2–11<0.1%
12–170.3%
18–6489.6%
65+9.7%

What is dimethyl used for

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

Abdominal DiscomfortAbdominal Pain UpperAccidental Exposure To ProductAdverse EventAmyotrophic Lateral SclerosisArthralgiaAstheniaAtaxiaAcute Myeloid LeukaemiaAdministration Site ExtravasationAdverse Drug ReactionAdverse EventAlopeciaAnaemiaArthralgia

Showing 15 of 217 indications

Dimethyl brand names and reporting trend

Dimethyl is sold under the brand name Rimso-50.

Brand names

Rimso-50218

Quarterly reports (20042025)

2005201520202025

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

Taking dimethyl with another medication?

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