วันศุกร์ที่ 25 ธันวาคม พ.ศ. 2558

Ergotamine tratrate + Caffeine



Ergotamine tratrate + Caffeine
(Antimigraine Preparations)


Dosage form
Brand
Strength
eye drop, cream , capsule, ear drop, tablet,
Avamigrain®, Cafegot®, Dergan®, Ergosia® ,Imigrain®, Migina®

Ergotamine tartrate 1 mg, caffeine 100 mg
Indication : Acute attack of migraine w/ or w/o aura.
Mechanism of action : agonist activity at the serotonin 5-HT1D receptor, resulting in vasoconstriction of intracranial blood vessels and inhibition of inflammatory neuropeptide release
Pregnancy Category X
Contraindication : Impaired peripheral circulation, obliterative vascular disease, CHD; severe HTN; renal or hepatic insufficiency, sepsis; pregnancy, lactation.
Precaution : Avoid frequent & prolonged use, discontinue treatment in impaired peripheral circulation. During prolonged & uninterrupted treatment drug-induced headache & rare case of rectal or anal ulcer occurred.
Drug Interaction : Possible risk of peripheral ischemia w/ erythromycin, troleandomycin, josamycin. Enhanced risk of vasospastic reaction w/ propranolol (rare). Vasoconstrictor agents.
Side Effect : nausea, vomiting; paresthesia, pain & weakness in the extremities; peripheral vasoconstriction (discontinue drug). Precordial pain, myocardial ischaemia & infarction. Prolonged use may cause pleural or retroperitoneal fibrosis or fibrotic changes in the cardiac valves.
Monitoring parameters : Monitor for signs of ergotism such as numbness or tingling of the extremities. BP
Usual Dose : At 1st sign of attack: Adult Initially 2 tab then 1 tab ½ hrly if required. Max: 6 tab/day, 10 tab/wk. Childn 6-12 yr Initially 1 tab. Max: 3 mg/attack/day. Max wkly dose: 5 mg
Missed Dose : Since ergotamine is taken only when needed, you are not likely to miss a dose. Do not take more than 3 ergotamine tablets per day or more than 5 tablets per week.

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