A 43-year-old female asked:
Disclaimer

i'm 18 years old and weigh 250 lbs. i am allergic to penicillin but have strep throat. what is the correct dose of cephalexin to be taken?

3 doctor answers
Dr. Larry Lutwick
48 years experience Infectious Disease
Before it is given,: Some people who are penicillin allergic can have cross allergies to cephalosporins like keflex.
Answered on Jan 16, 2015
1
1 thank
Dr. James Ball
18 years experience Pediatric Hematology and Oncology
See below: The dose can vary. The frequency of dosing can vary. I would probably treat with 1500 or 2000 milligrams twice a day. But again the dose and frequency varies. Some will give this medication 3 times a day. Hope he gets better.
Answered on Jan 16, 2015
1
1 thank
Dr. Steven Machtinger
43 years experience Allergy and Immunology
Take erythromycin: Some penicillin-allergic persons are also allergic to cephalosporins like cephalexin. Its safer to take a macrolide drug like erythromycin, biaxin (clarithromycin) or zithromax.
Answered on Jan 16, 2015
2
2 thanks

90,000 U.S. doctors in 147 specialties are here to answer your questions or offer you advice, prescriptions, and more. Get help now:

Ask doctors free
Personalized answers
Free
Talk to a doctor
Unlimited visits
$10/month

Related questions:

A 39-year-old female asked:
Dr. Laura McMullen
20 years experience Pediatrics
It : It depends on the strength of the oral suspension and the weight of your child. Cephalexin oral suspension comes in 2 strengths: 125mg/5ml or 250mg/5 ... Read More
1
1 thank
A 21-year-old male asked:
Dr. George Blum
65 years experience Pediatrics
30 mgm / KG: Can stop after 6 days. There are other meds for strep that are less likely to cause intestinal changes.
1
1 thank
A female asked:
Dr. Richard Zimon
58 years experience Internal Medicine
It's actually: a GOOD CHOICE for an antibiotic since it will probably "cover" both infections (both gram positive and gram negative organisms) Hope this is helpful D ... Read More
A male asked:
Dr. Julan Crane
24 years experience Pediatrics
Antibiotics alcohol: although alcohol does not reduce the effectiveness of most antibiotics it can delay how quickly you recover from an illness. It's a good idea to reco ... Read More

90,000 U.S. doctors in 147 specialties are here to answer your questions or offer you advice, prescriptions, and more. Get help now:

Ask doctors free
Personalized answers
Free
Talk to a doctor
Unlimited visits
$10/month