Dear Patient,

We are pleased to announce that my associate, Dr. Bhushan C. Gupta, will resume seeing scheduled patients every Wednesday, starting on March 31, 2021, between the hours of 9:00a-2:00p.  Dr. Gupta has openings available for new patient evaluations, follow-up appointments and testing appointments.   

In addition to our regular Monday, Tuesday, Thursday and Friday hours, we will also be open for immunotherapy injections by appointment only from 9:00a-2:00p on Wednesdays, beginning March 31. Please call the office to schedule your appointment for an allergy shot.  We are looking forward to seeing you.   

As always, we put the care and safety of our patients first. In light of COVID, we are continuing to require staff and patients to wear a mask at the clinic, maintaining social distancing and frequently disinfecting the office. We urge everyone to receive one of the free COVID vaccines as soon as you are eligible.


Andrew Engler, MD

Video Visits with an Allergy and Asthma Clinic Health Care Provider are Available Now!

We now offer you secure video visits. Video visits can be a convenient way to have a live video telehealth visit and is appropriate for many types of appointments; including follow-up visits, sick visits, review of current medications, new allergy and/or asthma symptoms.

Want a Telehealth video visit, in office appointment or have a question?LEARN MORE ABOUT TELEHEALTH REQUEST ONLINE



In order to protect our staff and patients, all staff, patients and visitors must continue to wear masks in our office. Stay Safe. Stay Healthy.

This is a special week in California. Because of our progress in managing the pandemic, on Tuesday, June 15, the state lifted most COVID-19-related community restrictions for people who are vaccinated.

All of us at The Allergy and Asthma Clinic share your relief and excitement at this giant step toward normalcy, and look forward to further reopening in months to come. However, at this time, masks, distancing, and screening for COVID-19 will continue to be required at our offices, even for people who have been fully vaccinated.

As a medical clinic with vulnerable patients, we're continuing these requirements in alignment with recommendations from public health authorities. Our top priority is the safety of our patients, visitors, employees, and community. Thank you for your understanding.

Allergy Shot Hours

As a medical office providing essential services, we plan to keep The Allergy and Asthma Clinic and Peninsula Allergy and Asthma Associates open, though we will be reducing our hours and days of operation. At this time, these are our current hours:

San Mateo Office:

Mondays, Tuesdays and Thursdays: We are open for drop-in allergy injections in the San Mateo office from 9:00am - 5:30pm.

Wednesdays: 9:00am - 2:00pm. - ALLERGY INJECTIONS BY APPOINTMENT ONLY.

Fridays: We are open for drop-in allergy injections from 7:30am-3:30pm.

Daly City Office:

Tuesdays: We are open for drop-in allergy injections in the Daly City office from 10:00am -12:00pm and from 1:30pm - 5:30pm.

Wednesdays: We are open for drop-in allergy injections in the Daly City office from 1:00pm - 5:30pm.

If you would like to schedule an appointment to meet with a provider, please call the office and we will be happy to schedule your appointment.

Please Welcome Dr. Bhushan C. Gupta, MD

Dr. Bhushan GuptaDr. Bhushan C. Gupta is Board Certified by the American Board of Allergy and Immunology and the American Board of Pediatrics. He is a member of the American Academy of Allergy Asthma and Immunology.  Dr. Gupta specializes in adult and pediatric allergy and asthma and did his fellowship in adult and pediatric allergy and immunology at St. Vincent’s Hospital in New York. 


Prepare for Spring Allergies Now

PollenWinter is a great time to prepare for spring allergy season. If allergen immunotherapy is or has been recommended after your allergy skin tests, you can start building your body’s resistance to your specific allergic triggers now to reduce the impact these allergens have on you in the spring months.

We are happy to help you check your specific insurance plan benefits and if there are any referral requirements for your visits. If you have any questions about your insurance benefits or to schedule an appointment, please call (650) 343-4597. You may also Request An Appointment through our website.

Early Morning Clinic Hours

For your convenience, we have expanded our allergy shot hours.

Allergy shots and office visits are now available in both the San Mateo and Daly City offices every Friday beginning at 7:30am.

Saturday Clinic Hours

For your convenience, we have expanded our office visit hours.

Office Visits are now available in the San Mateo office every Saturday beginning at 9:00am.

EpiPen Shortage

Mylan the maker of EpiPen is encouraging patients who are experiencing difficulty filling their prescriptions for EpiPens to contact Mylan Customer Relations at (800) 796-9526 for assistance in locating alternative pharmacies.

We are proud to announce that Dr. Engler was chosen as Top Doctors of San Mateo 2018 by Castle Connolly Ltd

San Mateo Top Doctors 2016A health care research and information company that has made it its mission to help patients find the best healthcare. Dr. Engler was chosen based on recommendations from licensed physicians and other medical professionals in the area. Candidates were evaluated based on their educational and professional experience, years of experience, board certification, quality of medical degree, hospital affiliations and whether they had received any disciplinary actions.

Dr. Engler was featured on KPIX news this week

El Niño Winter Contributing To Bad Allergy Season In California.

Do your allergies seem worse this year? You’re not imagining it, and recent wet weather is playing a role. Sharon Chin reports. (4/12/16)

Disclaimer: The Allergy & Asthma Clinic does not condone or affiliate with any advertisements that may accompany this video presentation

Watch Dr. Engler on KPIX News here

Dr. Engler Chosen as One of the Top Allergists in the Bay Area

San Francisco Magazine Top Doctors 2015We are proud to announce that Dr. Engler was among 1 of 13 allergists chosen as “Our Best Doctors” in the January, 2015 edition of San Francisco Magazine. The list of doctors was chosen from nearly 3000 nominees in the 8 Bay Area counties based on recommendations from licensed physicians and other medical professionals in the region.  Each candidate was evaluated based on their educational and professional experience, years of experience, board certification, quality of medical degree, hospital affiliations and whether they had received any disciplinary actions.  San Francisco Magazine worked in collaboration with Castle Connolly Ltd—a health care research and information company that has made it its mission to help patients find the best healthcare.

What is Cluster Immunotherapy?

Allergy immunotherapy is the medical term for a very effective treatment to help you become less allergic. Cluster immunotherapy is a process of giving allergy shots to treat your underlying allergies but unlike conventional immunotherapy, Cluster Immunotherapy allows the patient to reach their “maintenance dose” over a period of weeks, rather than months, thus allowing the patient to experience the benefits of immunotherapy sooner.

Cluster Immunotherapy

Helping our community and raising Asthma Awareness.

Our free asthma screening event on Saturday, May 26th at the Hillsdale Mall was a huge success.  We had many visitors and the turnout was very successful.  It was great fun and we were thrilled to have had an opportunity to educate the public.  There were excellent questions being asked and we were more than happy to answer them. We were delighted to see that even some of our own patients came to visit thanking us for helping the community learn more about this very treatable condition. We particularly enjoyed our interactions with the children who seemed to enjoy blowing into the spirometer as hard as they could to test their lung function!  Here are some pictures of the event.

Community Awareness
Asthma Awareness
Allergy Awareness
Helping the community

Aspirin allergy and heart disease prevention

It is a well known fact that aspirin therapy is of extreme benefit for most cardiovascular patients, both in primary and secondary prevention of coronary artery disease (CAD). Long -term aspirin therapy reduces mortality in CAD patients after an initial coronary event. Aspirin therapy also significantly reduces major adverse cardiovascular events after coronary intervention procedures. Consequently, patients who have to avoid aspirin due to an allergy are at a significant disadvantage. However, proper classification of aspirin allergic patients and the potential for aspirin desensitization therapy would open up use of this highly cost effective therapy for cardiovascular patients. It is recognized by the American Heart Association that aspirin desensitization protocols facilitate optimal management of the cardiovascular patient with aspirin allergy.

Aspirin allergy and Asthma/Sinus Disease

According to Scripps Clinic and Research Foundation, a study of aspirin hypersensitivity shows that approximately 15% of all asthma patients and 40% of asthmatics with nasal polyps and sinusitis are allergic to aspirin. Aspirin-Exacerbated Respiratory Disease (AERD) consists of asthma, nasal and sinus polyps and a respiratory sensitivity to aspirin and non-steroidal anti-inflammatory drugs (such as ibuprofen and naproxen). Patients with this syndrome have progressive inflammatory disease of the upper and lower respiratory tracts. The disease is often difficult to control and frequently requires multiple sinus operations and treatment with oral corticosteroids. Researchers at Scripps found that desensitizing AERD patients, in order for them to be able to take aspirin for other conditions, resulted in improvement in their upper and lower respiratory tract inflammation. The goal of aspirin desensitization is to follow it with long-term aspirin treatment, which has been shown to be effective in reducing upper and lower respiratory inflammation in these patients.

There are several ways patients with AERD benefit from aspirin desensitization treatment, in addition to its cardiovascular benefits:

  • it can reduce your need for oral corticosteroids
  • reduce the number of sinus surgeries.
  • reduce the number of sinus infections
  • reduce nasal congestion
  • improve asthma symptoms
  • reduce hospital visits related to asthma
  • it can actually improve your sense of smell

We now provide aspirin desensitization treatments in our office. If you or someone you know have a concern about aspirin sensitivity and think you might benefit from this treatment, please contact us to discuss it. The treatment is safe and is performed in a controlled environment, using a successful, clinically proven protocol.

We now have Penicillin allergy testing available at our clinic

It is estimated that penicillin allergy is greatly overstated and a lot more people think they are allergic to penicillin than really are. Approximately 85% of patients who describe themselves as penicillin allergic will have negative skin tests and can safely receive penicillin. PrePen is the only FDA approved skin test for the diagnosis of penicillin allergy and we are excited to offer this service to our patients.

Penicillin allergy testing not only benefits patients, but also physicians and other health care providers, as well as surrounding communities. These benefits include fighting resistant bacteria and offering less expensive treatments for patients. As many of you know, drug-resistant bacteria pose a major public health threat in today’s world. Many patients thought to be allergic to penicillin are treated with very potent antibiotics which are often quite expensive. Continued use of these antibiotics may lead to increased drug-resistant bacteria, limited availability of alternative treatment for more severe infections, and greater side effect profiles.

How does one undergo Penicillin allergy testing?

After obtaining your medical history, you and your healthcare provider will decide if you are a candidate to undergo this evaluation. Penicillin allergy testing is performed via skin tests and if the skin tests are essentially negative, an “oral challenge” to penicillin is performed. Negative test results using PrePen indicate a 97% confidence that the patient can be treated without the fear of a life threatening reaction if they are to take an antibiotic in the penicillin family. It is important to note that penicillin allergy testing may be contraindicated in those patients who have had a systemic reaction to penicillin. However, many patients with a history of penicillin allergy had a rash many years ago or were told when they were younger that they were allergic to penicillin but do not remember the details. Most of the time, these people are good candidates for penicillin allergy testing and will be found not to be allergic to this antibiotic—thus making treatment of future infections much safer and less expensive.

If you or someone you know would like to consider undergoing an allergy evaluation to penicillin, please contact our office and our staff will be happy to assist you.