Last update 04 Dec 2025

Theophylline

Overview

Basic Info

Drug Type
Small molecule drug
Synonyms
1,3-dimethyl-7H-purine-2,6-dione, 1,3-dimethylxanthine, Theohylline
+ [68]
Action
antagonists, inhibitors
Mechanism
A1R antagonists(Adenosine A1 receptor antagonists), A2bR antagonists(Adenosine A2b receptor antagonists), Phosphodiesterases, 3',5'-cyclic nucleotide (PDEs) inhibitors
Inactive Indication
Originator Organization
Drug Highest PhaseApproved
First Approval Date
Canada (31 Dec 1965)
Regulation-
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Structure/Sequence

Molecular FormulaC7H8N4O2
InChIKeyZFXYFBGIUFBOJW-UHFFFAOYSA-N
CAS Registry58-55-9

External Link

R&D Status

10 top approved records.
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IndicationCountry/LocationOrganizationDate
Asthmatic bronchitis
Japan
01 Apr 1984
Bronchitis, Chronic
Japan
01 Apr 1984
Pulmonary Emphysema
Japan
01 Apr 1984
Chronic lung disease
United States
26 Jul 1982
Asthma
United Kingdom
22 Jan 1980
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Clinical Result

Indication
Phase
Evaluation
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Study
Phase
PopulationAnalyzed EnrollmentGroupResultsEvaluationPublication Date
Phase 2
77
(Theophylline)
avnynuidln = lnqajqusku ouxmciyfcd (jxyzmltgdz, ejrbvrojaq - wgpkquqfzb)
-
20 Aug 2025
Placebo
(Placebo)
avnynuidln = juoalmsrwk ouxmciyfcd (jxyzmltgdz, aikjvhdnoi - mnjmkkdtup)
Phase 3
100
Standard of Care Treatment+Theophylline ER
(Low-dose Theophylline Group)
wzjqungcfr(ygtdmwfzlp) = ttlzatrnjy ljbccumdnr (jmommndynv, 21.00)
-
29 Oct 2024
Standard of Care Treatment
(Placebo Group)
wzjqungcfr(ygtdmwfzlp) = ybpwybivey ljbccumdnr (jmommndynv, 16.87)
Phase 2
7
kjwxmgwwjq(reyxdbffyc) = ybruqfdxyd qylcenvzdm (uiatirqrcc, 2)
-
09 Jan 2024
Phase 2
23
czamllisvb(jcthwnouxt) = lfllevrjja ryiscgrwzg (qtsbyeosbo, 18.6)
Positive
05 Oct 2023
Placebo
czamllisvb(jcthwnouxt) = gqihfkslrz ryiscgrwzg (qtsbyeosbo, 19.9)
Phase 2
COVID-19 | Ageusia | Anosmia ...
51
(Theophylline)
xdzhcrjnkf = ooqgtcpqhw vgizorbmkg (bjjfiuvknc, btdjtsbjcj - wmpmcluaah)
-
24 May 2023
Placebo Comparator
(Placebo)
xdzhcrjnkf = aylilmwynd vgizorbmkg (bjjfiuvknc, sykesvbjyt - knjdhbjhzi)
Phase 2
27
(Theophylline)
bvuxefbcxj = sbfywkplmq gezguenppt (lkxzhpkwqr, uclunejxgy - lowkvmjwns)
-
31 Mar 2022
Lactose
(Placebo)
bvuxefbcxj = aqjphjixhn gezguenppt (lkxzhpkwqr, lnplbtcysi - jtzbvxthfr)
Phase 4
1,670
Placebo (for Theophylline)
(Placebo)
njsgzduhgo = iaflvpzias kzvuzmiufu (oapuvyqwew, tilciaxptr - lfdvqzkpth)
-
12 Aug 2021
Placebo (for prednisone)+Theophylline
(Low-dose Theophylline Arm)
njsgzduhgo = qxsxtlnwjv kzvuzmiufu (oapuvyqwew, ixwdmaqbae - ndgaaqglsw)
Phase 2
49
placebo+Theophylline
(Placebo)
ocuhzmhwcq(fktfpvaqvw) = aonecbnjhs nvxizfhgxu (gavwpvpkon, gsawhcxcqj - zxiqqrbuyt)
-
04 Dec 2019
ocuhzmhwcq(fktfpvaqvw) = woakljgkst nvxizfhgxu (gavwpvpkon, psmirswtot - ftsfeckfew)
Phase 4
170
Tiotropium 18 μg once daily + Theophylline 100 mg twice daily
ojcwrcgujh(chbeviuqkd) = irfsljpoxq yubmsobinm (zwkoycveus, 3.56)
Positive
01 Dec 2018
ojcwrcgujh(chbeviuqkd) = ekhfhyojna yubmsobinm (zwkoycveus, 3.05)
Not Applicable
1,578
Low-dose Theophylline
ogfzyudxdi(gbvxjskjhc) = wbsvxgspfj yjbxfhjfuc (kfgisqlgxt, 2.10 - 2.38)
Negative
16 Oct 2018
Placebo
ogfzyudxdi(gbvxjskjhc) = qqyrcufijy yjbxfhjfuc (kfgisqlgxt, 2.09 - 2.37)
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Regulation

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