Clozaril
(clozapine tablets)
Revisions
to the BOXED WARNING, WARNINGS, CONTRAINDICATIONS, PRECAUTIONS
(Information for Patients and Pharmacokinetic-Related Interactions
subsections), and ADVERSE REACTIONS (Postmarketing Clinical Experience
subsection) sections of the prescribing information for Clozaril
(clozapine) tablets. Recommendations from the FDA's Psychopharmacological
Drugs Advisory Committee regarding the white blood cell monitoring
schedule, required for all clozapine users, has resulted in modification
in the monitoring schedule. Additional labeling changes address
safety issues related to dementia-related psychosis, parlytic
ileus, hypercholesterolemia and pharmacokinetic interaction with
citalopram. From
the FDA Medwatch: more
Serzone
(nefazodone hydrochloride)
Changes to Indications and Usage: . . . the prescriber should
consider the risk of hepatic failure associated with Serzone treatment
(see warnings). In many cases , this would
lead to the conclusion that other drugs should be tried first.
Changes to Dosage and Administration: When
deiding among the alternative treatments available for depression,
the prescriger should consider the risk of hepatic failure associated
with Serzone treatment (see warnings).
Also addition to warnings
requirding the need for careful monitoring for risk of suicide.
For
more information: Bristol-Myers Squibb Company, P.O. Box 4500,
Princeton, NJ, 08543-4500. jk,6-18-04
Desyrel
(Trazodone
Hydrochloride Tablets)
Label modifications in the Clinical Pharmacology section discuss
the metabolizum of the active metabolite by the cytochrome P450
3A4 (CYP3A4), and the inhibition by ketoconazole, ritonavir, indinavir,
and carbamazzepine, with resultant increase in serum levels and
half-life of trazodone. Similar changes were made to the Precautions
section.
For more information: Bristol-Myers Squibb Company, P.O. Box 4500,
Princeton, NJ, 08543-4500. jk, 4-23-04
Sporanox
(itraconazole)
Labeling change: Black Box Warning: "Drug Interactions:
Coadministration of cisapride, pimozide, quinidine, dofetilide,
or levacetylmethadol (levomethadyl) with Sporanox, a potent cytochrome
P450 3A4 isoenzyme system (CYP3A4) inhibitor, may increase plasma
concentrations of drugs metabolized by this pathway. Serious cardiovascular
events, including QT prolongation, torsades de pointes, ventricular
tachycardia, cardiac arrest, and/or sudden death have occurred
in patients using . . . (sic: these drugs) . . . Further information
is provided in changes to Contraindications, Warnings, and Precautions,
including:
1. Ergot alkaloids are contraindicated.
2. Halofantrine should be used with caution if coadimistered with
Sproanox.
3. ...cases of congenital abnormalities have been reported. .
.
4. Caution with renal impairment.
5. Sporanox is not recommended with severely neutropenic patients/
For more information: 800-526-7736, Janssen Pharmaceutica Products,
L.P.
jk, 4-2-04.
Serevent
(salmeterol xinafoate)
Labeling change based on the Smart Safety Study,
a 28 week safety study comparing Serevent and placebo in treating
asthma. An interim analysis of on 28,858 patients showed a higher
but not statistically signifcant number of asthma related life-threatening
experiences, including deaths, in the Serevent group. There was
a statistically significant greater number of primary events and
asthma related events, including deaths, in African Americans
treated with Serevent. New recommendations and advice for managing
asthma patients were provided. GlaxoSmithKline, 888-825-5249,
www.gsk.com,
11/03, jk
Prempro
(0.625 mg., conjugated equine estrogen, 2.5 mg., medroxyprogesterone
acetate) May, 2003
Labeling change based on the Women's Health Initiative Memory
Study (WHIMS, a subsidy of the Women's Health Initiative (WHI).
This substudy followed 4,532 women, 65 years or older, for an
average of 4.1 years. It found an increased relative risk of developing
probable dementia compared to women taking a placebo. The labeling
change is for the warnings and adverse events sections of the
product labeling.
For more information, Wyeth, 800-934-5556.
Activella
(estradiol/norethindrone acetate tablets) March 2003
Because of the Women's Health Initiative study using Prempro and
the increased incidence of adverse effects, Pharmacia recommends
the use of progestins in combination with estrogens should be
monitored closely, should be limited to the shortest duration
consistent with treatment goals and risks for he individual woman,
and should be periodically evaluated.
For more information, Pharmacia, 100 Route 206 North, Peapack,
NJ 07977.
Prempro
(conjugated estrogens/medroxyprogesterone acetate tablets), Premphase
(conjugated estrogens/medroxyprogesterone acetate tablets), and
Premarin (conjugated estrogens tablets, USP). January,
2003
For More Information: Wyeth Pharmaceuticals, 800-934-5556, www.prempro.com.
New boxed warnings stating that combination therapies should
not be used for prevention of cardiovascular disease. For estrogen
only therapies, the same language plus the increased risk of endometrial
cancer if used without a progestin. Also new risk information
based on the Women's Health Initiative.
Zoloft
(sertraline hydrochloride).November, 2002.
For more information: Pfizer, Inc, 212-573-2323. FDA has changed
the prescribing information because of the results of a recent
study. Zoloft and Pimozide should not be administered together
Provera
(Combination conjugated equine estrogens (CEE)) November,
2002.
More Information: 800-323-4204, Pharmacia's Medical and Drug Information
Unit. In light of the Women's Health Initiative Study, one component
of Prempro, Provera, should be assumed to carry the same
increased risks of cardiovascular events, breast cancer, and venous
thromboembolic events associated with the use of Prempro. Use
of Provera in conjunction with estrogens should be monitored
closely, should be limited to the shortest duration consistent
with treatment goals and risks for the individual woman, and should
be periodically evaluated.
Bextra
(valdecoxib tablets)November 13, 2002
Changes to product labeling: postmarking experience revels rare,
spontaneous hypersensitivity reactions (i.e., anaphylactic reactions
and angiodema). Also skin reactions, including Stevens-Johnson
syndrome, toxic epidermal necrolysis, exfoliative dermatitis and
erythema multiforme. Some of these patients had a history of allergic-type
reactions to sulfonamides, while others didn't.
OxyContin
July 18, 2001
See also: www.purduepharma.com,
888-726-7535
1. New Warnings: Tablets are to swallowed whole, and are not to
be broken, chewed, or crushed. Doing so may cause absorption of
potentially fatal dose of the drug.
2. New Indications: Moderate to severe pain for continuous analgesia
for an extended time; Not for use as a prn analgesic; Treatment
should be individualized; Postoperative use only if patient was
taking before the surgery. Purdue Pharma, L.P., 1 Stamford
Forum, Stamford, CT 06901-3431
Lamisil
May, 2001.
Summery:
1. Rare Hepatic Failure,
2. Possible drug interactions with CYP2D6 mediated compounds,
3. Confusion with other drugs, especially Lamictal (lamotrigene,
an antiepileptic.
Novartis Pharmaceuticals Corporation, 59 Route 10, East hanover,
NJ 07936-1080
Lotronex
(alosetron),
November, 2000
Summery: Discontinuing marketing and implement a withdrawal because
of reports of ischemic colitis with rare reports of death.
GlaxoWellcome, Five Moree Drive, PO Box 13398, Research Triangle
Park, NC, 27709-3398