theophylline has been researched along with norpseudoephedrine in 2 studies
| Timeframe | Studies, this research(%) | All Research% |
|---|---|---|
| pre-1990 | 1 (50.00) | 18.7374 |
| 1990's | 0 (0.00) | 18.2507 |
| 2000's | 1 (50.00) | 29.6817 |
| 2010's | 0 (0.00) | 24.3611 |
| 2020's | 0 (0.00) | 2.80 |
| Authors | Studies |
|---|---|
| Keup, W | 1 |
| Benowitz, NL; Haller, CA; Jacob, P | 1 |
1 trial(s) available for theophylline and norpseudoephedrine
| Article | Year |
|---|---|
Pharmacology of ephedra alkaloids and caffeine after single-dose dietary supplement use.
Topics: Adult; Affect; Blood Pressure; Caffeine; Central Nervous System Stimulants; Emotions; Ephedra; Ephedra sinica; Ephedrine; Female; Gas Chromatography-Mass Spectrometry; Half-Life; Heart Rate; Humans; Male; Phenylpropanolamine; Pilot Projects; Reference Values; Theobromine; Theophylline | 2002 |
1 other study(ies) available for theophylline and norpseudoephedrine
| Article | Year |
|---|---|
Use, indications and distribution in different countries of the stimulant and hallucinogenic amphetamine derivatives under consideration by WHO.
Topics: Amphetamines; Antipyrine; Central Nervous System Stimulants; Diethylpropion; Hallucinogens; Humans; Phenylpropanolamine; Propylamines; Substance-Related Disorders; Theophylline; World Health Organization | 1986 |