Theophylline Sustained-Release Tablets and Timolol ophthalmic
Determining the interaction of Theophylline Sustained-Release Tablets and Timolol ophthalmic 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:Ask your doctor before using timolol ophthalmic together with theophylline. Using these medications together can make timolol ophthalmic less effective and increase the effects of theophylline. Contact your doctor if you experience nausea, vomiting, insomnia, tremors, restlessness, uneven heartbeats, or difficulty breathing. If your doctor does prescribe these medications together, you may need a dose adjustment or special test to safely use both medications. 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:GENERALLY AVOID: The pharmacologic effects of theophyllines and beta-blockers are opposite. Nonselective and high doses of cardioselective beta-blockers may cause severe or fatal bronchospasm by opposing theophylline-induced bronchodilation. Ophthalmic beta-blockers undergo significant systemic absorption and may also interact. In addition, propranolol and other beta-blockers may reduce the CYP450 hepatic metabolism of theophylline, and serum theophylline levels may be increased.
MANAGEMENT: Oral and ophthalmic nonselective beta-blockers (e.g., carteolol, carvedilol, levobunolol, metipranolol, nadolol, oxprenolol, penbutolol, pindolol, propranolol, sotalol, and timolol) are considered contraindicated in patients with bronchospastic diseases. Cardioselective beta-blockers should generally be avoided, or used with extreme caution if no other alternatives are available and the benefits outweigh the risks of potentially severe bronchospasm. If patients do receive this combination, they should be closely monitored for increased serum theophylline levels but decreased bronchodilatory effectiveness.
- Horvath JS, Woolcock AJ, Tiller DJ, Donnelly P, Armstrong J, Caterson R "A comparison of metoprolol and propranolol on blood pressure and respiratory function in patients with hypertension." Aust N Z J Med 8 (1978): 1-6
- Upton RA "Pharmacokinetic interactions between theophylline and other medication (Part II)." Clin Pharmacokinet 20 (1991): 135-50
- Mue S, Sasaki T, Shibahara S, et alT "Influence of metoprolol on hemodynamics and respiratory function in asthmatic patients." Int J Clin Pharmacol Biopharm 17 (1979): 346-50
- Conrad KA, Nyman DW "Effects of metoprolol and propranolol on theophylline elimination." Clin Pharmacol Ther 28 (1980): 463-7
- Lombardi TP, Bertino JS, Goldberg A, Middleton E, Slaughter RL "The effects of a beta-2 selective adrenergic agonist and a beta- nonselective antagonist on theophylline clearance." J Clin Pharmacol 27 (1987): 523-9
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
Generic Name: timolol ophthalmic
Brand name: Betimol, Istalol, Timoptic Ocudose, Timoptic Ocumeter, Timoptic Ocumeter Plus, Timoptic-XE, Timoptic
Synonyms: Timolol (Ophthalmic)
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.
- Theophylline Sustained-Release Tablets-Timolol Unit Dose Eye Drops
- Theophylline Sustained-Release Tablets-Timoptic
- Theophylline Sustained-Release Tablets-Timoptic in Ocudose
- Theophylline Sustained-Release Tablets-Timoptic Ocudose
- Theophylline Sustained-Release Tablets-Timoptic Ocumeter
- Theophylline Sustained-Release Tablets-Timoptic Ocumeter Plus
- Timolol ophthalmic-Thera-D 2000
- Timolol ophthalmic-Thera-Gesic
- Timolol ophthalmic-Thera-Gesic Plus
- Timolol ophthalmic-Thera-Sal Topical
- Timolol ophthalmic-Thera-Tabs
- Timolol ophthalmic-Thera-Tabs M