Severe. These medicines may interact and cause very harmful effects and are usually not taken together. Contact your healthcare professional (e.g. doctor or pharmacist) for more information.
How the interaction occurs:
When these two medicines are taken together, your body may not process ergot derivatives properly.
What might happen:
Your blood levels of your ergot derivative may increase and cause chest pain; change in heartbeat; numbness and tingling of your hands, feet, or face; pain in your arms, legs, or lower back; or itching.
What you should do about this interaction:
Contact your healthcare professionals (e.g. doctor or pharmacist) as soon as possible about taking these two medicines together. They may already be aware of this drug interaction and may be monitoring you for it. Do not start, stop, or change the dosage of any medicine before checking with them first.
1.Agenerase (amprenavir) Oral Solution US prescribing information. GlaxoSmithKline May, 2005.
2.Reyataz (atazanavir sulfate) US prescribing information. Bristol-Myers Squibb Company June, 2014.
3.Reyataz (atazanavir sulfate) Australian product information. Bristol-Myers Squibb Pharmaceuticals January 8, 2004.
4.Prezista (darunavir) US prescribing information. Tibotec Inc. November, 2013.
5.Lexiva (fosamprenavir calcium) US prescribing information. GlaxoSmithKline February, 2013.
6.Crixivan (indinavir sulfate) US prescribing information. Merck & Co., Inc. July, 2014.
7.Kaletra (lopinavir/ritonavir tablets) US prescribing information. Abbott Laboratories January, 2013.
8.Viracept (nelfinavir mesylate) US prescribing information. Agouron Pharmaceuticals, Inc. May, 2013.
9.Fortovase (saquinavir) US prescribing information. Roche Laboratories, Inc. December, 2004.
10.Invirase (saquinavir mesylate) US prescribing information. Roche Laboratories, Inc. February, 2012.
11.Aptivus (tipranavir) US prescribing information. Boehringer Ingelheim Pharmaceuticals, Inc. February, 2012.
12.Norvir (ritonavir) US prescribing information. Abbott Laboratories November, 2012.
13.Methergine (methylergonovine maleate) US prescribing information. Novartis Pharmaceuticals Corporation June, 2012.
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