Drug Eruption and Interactions - PHARMACEUTICAL REVIEW

Drug Eruption and Interactions - PHARMACEUTICAL REVIEW Drug Eruption and Interactions - PHARMACEUTICAL REVIEW

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Reactions Skin Angioedema Erythema Pruritus Rash (sic) (1.1%) Urticaria Mucosal Xerostomia (1%) (1990): Schultze-Werninghaus G, Lung 168 (Suppl 83–9) (1%) Other Anaphylactoid reactions/Anaphylaxis (1%) Cough (1990): Schultze-Werninghaus G, Lung 168 (Suppl 83-9) Death (2006): Aaronson DW, J Allergy Clin Immunol 117(1), 40 Infections (3%) Myalgia/Myositis/Myopathy/Myotoxicity FOSAMPRENAVIR* Trade name: Lexiva (GSK) Indications: HIV infections (in combination with other antiretrovirals) Category: Antiretroviral; Protease inhibitor, HIV Half-life: 7.7 hours Clinically important, potentially hazardous interactions with: amiodarone, atorvastatin, bepridil, carbamazepine, delavirdine, dihydroergotamine, flecainide, itraconazole, ketoconazole, lidocaine, lovastatin, midazolam, phenobarbital, phenytoin, pimozide, propafenone, quinidine, rifabutin, rifampin, sildenafil, simvastatin, St John’s wort, triazolam, vardenafil, warfarin Reactions Skin Exanthems Pruritus (7%) Rash (sic) (~19%) (2004): Chapman TM+, Drugs 64(18), 2101 Stevens–Johnson syndrome Other Abdominal pain (5%) (2004): Chapman TM+, Drugs 64(18), 2101 Hypersensitivity (2006): Gathe JC Jr+, Clin Ther 28(5), 745 (7%) (with ritonavir) (2004): Chapman TM+, Drugs 64(18), 2101 Infections *Note: Fosamprenavir is a prodrug of amprenavir **Note: Fosamprenavir is a sulfonamide and can be absorbed systemically. Sulfonamides can produce severe, possibly fatal, reactions such as toxic epidermal necrolysis and Stevens–Johnson syndrome FOSCARNET Trade names: Foscavir (AstraZeneca); Foscovir Indications: Cytomegalovirus retinitis in patients with AIDS Category: Antiviral; DNA & RNA polymerase inhibitor Half-life: ~3 hours Clinically important, potentially hazardous interactions with: adefovir, cyclosporine Reactions FOSCARNET 239 Skin Acne Dermatitis (5%) Edema (5%) (2001): Roos TC+, JAmAcadDermatol44, 546 (1990): Green ST, JInfection21, 227 Facial edema (>5%) Fixed eruption (1990): Connolly GM+, Genitourin Med 66, 97 Herpes simplex (5%) (2001): Roos TC+, JAmAcadDermatol44, 546 Pruritus ani et vulvae (5%) Toxic epidermal necrolysis (1999): Wharton JR+, Cutis 63, 333 (1997): Lauglin CL, Little Rock, Arkansas, American Academy of Dermatology Meeting, (SF) (gross and microscopic) Ulcerations (>5%) Urticaria (

240 FOSCARNET Oral ulceration (2000): Madinier I+, Ann Med Interne (Paris) (French) 151, 248 (1997): Schiodt M, Oral Dis 3 Suppl 1, S208 (1990): Fégueux S+, Lancet 335, 547 (1990): Gilquin J+, Lancet 335, 287 (1990): Moyle G+, Lancet 335, 547 Stomatitis (

Reactions<br />

Skin<br />

Angioedema<br />

Erythema<br />

Pruritus<br />

Rash (sic) (1.1%)<br />

Urticaria<br />

Mucosal<br />

Xerostomia (1%)<br />

(1990): Schultze-Werninghaus G, Lung 168 (Suppl 83–9) (1%)<br />

Other<br />

Anaphylactoid reactions/Anaphylaxis (1%)<br />

Cough<br />

(1990): Schultze-Werninghaus G, Lung 168 (Suppl 83-9)<br />

Death<br />

(2006): Aaronson DW, J Allergy Clin Immunol 117(1), 40<br />

Infections (3%)<br />

Myalgia/Myositis/Myopathy/Myotoxicity<br />

FOSAMPRENAVIR*<br />

Trade name: Lexiva (GSK)<br />

Indications: HIV infections (in combination with other<br />

antiretrovirals)<br />

Category: Antiretroviral; Protease inhibitor, HIV<br />

Half-life: 7.7 hours<br />

Clinically important, potentially hazardous interactions<br />

with: amiodarone, atorvastatin, bepridil, carbamazepine,<br />

delavirdine, dihydroergotamine, flecainide, itraconazole,<br />

ketoconazole, lidocaine, lovastatin, midazolam, phenobarbital,<br />

phenytoin, pimozide, propafenone, quinidine, rifabutin, rifampin,<br />

sildenafil, simvastatin, St John’s wort, triazolam, vardenafil,<br />

warfarin<br />

Reactions<br />

Skin<br />

Exanthems<br />

Pruritus (7%)<br />

Rash (sic) (~19%)<br />

(2004): Chapman TM+, <strong>Drug</strong>s 64(18), 2101<br />

Stevens–Johnson syndrome<br />

Other<br />

Abdominal pain (5%)<br />

(2004): Chapman TM+, <strong>Drug</strong>s 64(18), 2101<br />

Hypersensitivity<br />

(2006): Gathe JC Jr+, Clin Ther 28(5), 745 (7%) (with ritonavir)<br />

(2004): Chapman TM+, <strong>Drug</strong>s 64(18), 2101<br />

Infections<br />

*Note: Fosamprenavir is a prodrug of amprenavir<br />

**Note: Fosamprenavir is a sulfonamide <strong>and</strong> can be absorbed<br />

systemically. Sulfonamides can produce severe, possibly fatal,<br />

reactions such as toxic epidermal necrolysis <strong>and</strong> Stevens–Johnson<br />

syndrome<br />

FOSCARNET<br />

Trade names: Foscavir (AstraZeneca); Foscovir<br />

Indications: Cytomegalovirus retinitis in patients with AIDS<br />

Category: Antiviral; DNA & RNA polymerase inhibitor<br />

Half-life: ~3 hours<br />

Clinically important, potentially hazardous interactions<br />

with: adefovir, cyclosporine<br />

Reactions<br />

FOSCARNET 239<br />

Skin<br />

Acne<br />

Dermatitis (5%)<br />

Edema (5%)<br />

(2001): Roos TC+, JAmAcadDermatol44, 546<br />

(1990): Green ST, JInfection21, 227<br />

Facial edema (>5%)<br />

Fixed eruption<br />

(1990): Connolly GM+, Genitourin Med 66, 97<br />

Herpes simplex (5%)<br />

(2001): Roos TC+, JAmAcadDermatol44, 546<br />

Pruritus ani et vulvae (5%)<br />

Toxic epidermal necrolysis<br />

(1999): Wharton JR+, Cutis 63, 333<br />

(1997): Lauglin CL, Little Rock, Arkansas, American Academy of<br />

Dermatology Meeting, (SF) (gross <strong>and</strong> microscopic)<br />

Ulcerations (>5%)<br />

Urticaria (

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