Norethindrone Acetate and Theophylline Elixir
Determining the interaction of Norethindrone Acetate and Theophylline Elixir and the possibility of their joint administration.
In the database of official manuals used in the service creation an interaction registered by statistical results of studies was found, which can either lead to negative consequences for the patient health or strengthen a mutual positive effect. A doctor should be consulted to address the issue of joint drug administration.
Consumer:Norethindrone may increase the blood levels and effects of theophylline. You may need a dose adjustment or more frequent monitoring by your doctor to safely use both medications. Contact your doctor if you develop nausea, vomiting, diarrhea, headache, restlessness, insomnia, seizures, heart palpitations, and/or irregular heartbeat, as these may be signs and symptoms of excessive theophylline levels. It is important to tell your doctor about all other medications you use, including vitamins and herbs. Do not stop using any medications without first talking to your doctor.
Professional:MONITOR: The coadministration with contraceptive steroids may increase the plasma concentrations of theophylline and other methylxanthines. The proposed mechanism is inhibition of methylxanthine metabolism via hepatic microsomal enzymes, of which estrogens and progestins are also substrates. In one study, theophylline clearance was approximately 30% lower in oral contraceptive users than in nonusers. However, clinical data have been conflicting.
MANAGEMENT: Caution is advised during concomitant therapy with methylxanthines and hormonal contraceptives. Serum theophylline levels and pharmacologic response should be monitored and the dosage adjusted accordingly, particularly following initiation or discontinuation of hormonal contraceptives in patients who are stabilized on their theophylline regimen. Patients should be advised to notify their physician if they experience signs and symptoms of theophylline toxicity such as nausea, vomiting, diarrhea, headache, restlessness, insomnia, and irregular heartbeat.
- Roberts RK, Grice J, McGuffie, Heilbronn L "Oral contraceptive steroids impair the elimination of theophylline." J Lab Clin Med 101 (1983): 821-25
- Gardner MJ, Tornatore KM, Jusko WJ, Kanarkowski R "Effects of tobacco smoking and oral contraceptive use on theophylline disposition." Br J Clin Pharmacol 16 (1983): 271-80
- Tornatore KM, Kanarkowski R, McCarthy TL, et al "Effect of chronic oral contraceptive steroids on theophylline disposition." Eur J Clin Pharmacol 23 (1982): 129-34
Generic Name: norethindrone
Brand name: Aygestin, Camila, Errin, Jolivette, Nora-Be, Ortho Micronor, Jolivette, Nor-QD, Nora-Be
Synonyms: Norethindrone
Generic Name: theophylline
Brand name: Elixophyllin, Theo-24, Respbid, T-Phyl, Aerolate III, Slo-Bid Gyrocaps, Slo-Phyllin, Theobid, Theo-Dur, Theolair, Theovent, Bronkodyl, Theo-X, Theo-Time, Theochron, Slo-Phyllin 125, Theoclear LA-130, Aerolate JR, Theolair-SR, Theoclear LA-260, Quibron-T, Quibron-T/SR, Uniphyl, Uni-Dur, Aerolate SR, Slo-Phyllin 80, Theoclear-80, Theo-Dur Sprinkles, Theosol-80, Asmalix, Aquaphyllin, Truxophyllin, Slo-Phyllin 250, TheoCap
Synonyms: Theophylline
In the course of checking the drug compatibility and interactions, data from the following reference sources was used: Drugs.com, Rxlist.com, Webmd.com, Medscape.com.
- Norethindrone Acetate-Theophylline in Dextrose
- Norethindrone Acetate-Theophylline Injection
- Norethindrone Acetate-Theophylline Intravenous
- Norethindrone Acetate-Theophylline Liquid
- Norethindrone Acetate-Theophylline Oral Solution
- Norethindrone Acetate-Theophylline Sustained-Release Capsules
- Theophylline Elixir-Norethindrone and Mestranol
- Theophylline Elixir-Norethindrone Tablets
- Theophylline Elixir-Norethindrone, ethinyl estradiol, and ferrous fumarate
- Theophylline Elixir-Norflex
- Theophylline Elixir-Norflex Injection
- Theophylline Elixir-Norfloxacin