If allergic to Bactrim (sulfamethoxazole and trimethoprim) & Ceclor, is allergy to all sulfa drugs & cephalosporins assumed?

Only if true allergy. Often, a side effect to a particular drug may by mistaken as an allergic reaction to a drug. If what you have experienced is a true allergic reaction, then you should avoid these types of drugs.
Depends. Ceclor is in the cephalosporin group and members in this group do not cross-react that much. If the reaction was an anaphylactic, consult an allergist before trying another cephalosporin. This is different from sulfa which you must avoid . On the other hand, recent studies have shown that sulfa allergy does not preclude you from using drugs with a so-called "sulfa-structure"

Related Questions

Very allergic to sulfa drugs, took 1 Bactrim (sulfamethoxazole and trimethoprim) 800 in error. What should I do?

Antihistamine helps. In such a situation, one can take antihistamines such as Benadryl, (diphenhydramine) Claritin, Allegra, or Zyrtec (all over-the-counter) and call her primary care doctor. What the doctor might do will likely depend on the type of reaction the patient has had in the past, how severe the reaction was, how fast the reaction happened, etc... Immediate, severe allergic reactions require an injection (EpiPen) and 911. Read more...

How can I test if I'm allergic to doxycycline? I took bactrim (sulfamethoxazole and trimethoprim) and had a bad reaction. Is it likely/probable to have a similar allergy to doxycycline?

No. They are completely different types of antibiotics so a bactim allergy would not indicate a Doxycycline allergy. If you've never used Doxycycline there is no reason to suspect or look for an allergy to it. Read more...
No. Bactrim (sulfamethoxazole and trimethoprim) and Doxycycline are completely unrelated drugs, and allergy to Bactrim (sulfamethoxazole and trimethoprim) is far more common than allergy to doxycycline. Read more...

I have proteus mirabilis. Was given bactrim (sulfamethoxazole and trimethoprim) but I'm allergic to sulfa. So was given amoxcillin 500mg twice a day for 5 days. Is this effective?

Antibiotics for UTI. You best answer will come from the physician (p) who prescribed the Amoxicillin for you. You p knows the results of the sensitivities the bacteria have to antibiotics. Speak to your p for a more meaningful answer, as your p knows your case best of all. Read more...

My daughter was put on bactrim (sulfamethoxazole and trimethoprim) last night for a bladder infection. She has sulfa allergy. Is it ok?

Absolutely NOT !!!! Do not give your daughter bactrim, (sulfamethoxazole and trimethoprim) which is a sulfonamide (sulfa) and could, if she is truly allergic, produce a life-threatening reaction. If she has already taken it and has no reactions, might continue, but if any reactions stop and see the dr. Who prescribed this. Read more...