Can i take nyquil with benzonatate

Benzonatate, a long chain polyglycol derivative chemically related to procaine, is a peripherally-acting, oral anesthetic agent whose mechanism of cough suppression is believed to involve inhibition of pulmonary stretch receptors. 10 Studies performed soon after its approval in the United States a half century ago showed …

Oseltamivir is usually taken twice daily when used for the treatment of influenza, or once daily when used to reduce the risk of catching influenza. Oseltamivir is usually taken for five days when used for treatment and 10 days when used for prevention. However, it may be continued for 6 to 12 weeks in certain situations.This causes changes in mood and drowsiness, among other effects. Combining them with promethazine can cause excessive drowsiness. Dizziness, blurred vision, and dry mouth may also become worse. Your healthcare provider may recommend a lower TCA dose, or an alternative to promethazine. 4.As many as 540 of the big cats now roam the region. Their numbers were once below 40. Amur tigers are continuing their comeback in Russia’s Far East, home to 95% of the global popu... My name is ***** ***** I’ve come down with a nasty flu. Today was my first day taking Benzonatate. My question is can I take NyQuil while on Benzonatate. FYI the capsule of Benzonatate was about 4 1/2 hours ago Doctor's Assistant: The Doctor can help. Just a couple quick questions before I transfer you. Benzonatate has very few potential drug interactions. However, it can cause sedation and dizziness, so should be used cautiously with other drugs that cause similar effects. Additionally, some studies report that high doses of benzonatate (i.e., overdoses) can increase the risk of serious side effects, such as seizures and cardiac arrest.While Cheratussin and benzonatate should not be taken together, as discussed above, they can potentially be taken the same day, as long as they are separated by at least 8 to 12 hours. It is not uncommon that they are prescribed together to be used at different times of the day. Generally, Cheratussin is a more effective sleep aid and sedative ...Q: Can I take Mucinex and benzonatate at the same time? By Sarah Lewis, PharmD. A: Yes. Doctors may combine Mucinex and benzonatate because they treat coughs in different ways. Mucinex is a brand name for guaifenesin, which is an expectorant. It thins mucus, making it easier to cough up. Benzonatate is an antitussive that …

Does benzonatate loosen mucus? It thins mucus, making it easier to cough up. Benzonatate is an antitussive that suppresses or quiets a cough. Brand names include Tessalon. Can you take over the counter cough medicine with benzonatate? No interactions were found between benzonatate and Robitussin Cough + Chest …For oral dosage form (capsules): For cough: Adults and children 10 years of age and older—100 milligrams (mg) three times a day. Do not take more than 200 mg at one time or more than 600 mg per day. Children younger than 10 years of age—Use is not recommended.In conclusion, taking benzonatate and Nyquil Cold and Flu together can potentially affect the effectiveness of either medication, as well as increase the risk of experiencing side effects. It is important to follow the recommended dosages, check for potential interactions, and consider your specific symptoms before combining these medications. Summary: Drug interactions are reported among people who take Montelukast sodium and Nyquil. Common interactions among females include bronchitis and headache. Common interactions among males include rash and urticaria. The phase IV clinical study analyzes what interactions people have when they take Montelukast sodium and Nyquil together. Jul 28, 2022 · It’s usually safe to take Mucinex with Nyquil or Dayquil. But you should avoid taking Nyquil or Dayquil with Mucinex DM, since they all contain dextromethorphan. It’s possible to take too much acetaminophen if you combine Tylenol with Nyquil or Dayquil. Talk to your healthcare provider or pharmacist before combining these medications. Hello,There is no reported interaction between benzonate and nyquil in drug data base.Both have some cough suppressant activity.When she has taken benzonate 3 …February 9, 20151:17 PM PSTUpdated 9 years ago. With cold and flu season in full swing, experts are warning men who have an enlarged prostate to avoid medicines containing antihistamines and ...

Drinking alcohol while taking Benzonatate can lead to potential risks and should be avoided. Both alcohol and Benzonatate can cause central nervous system depression, which means they can slow down brain function and reflexes (2,3). When taken together, the effects of alcohol and Benzonatate can be amplified, leading to increased …Yes, Mucinex and Nyquil can be taken together because they contain different ingredients, but Mucinex DM and Nyquil should not be taken together because they share a common ingredient, dextromethorphan. Instead of taking Mucinex DM and Nyquil together you should just take Nyquil. Mucinex contains guaifenesin which is an expectorant and its main ...Ask your doctor before using acetaminophen together with ethanol. This can cause serious side effects that affect your liver. Call your doctor immediately if you experience a fever, chills, joint pain or swelling, excessive tiredness or weakness, unusual bleeding or bruising, skin rash or itching, loss of appetite, nausea, vomiting, or ...Customer: I took benzonatate but not getting relief from my cough and wheezing. Can I also take nyquil? I just want some relief and rest. Doctor's Assistant: The Doctor can help. Just a couple quick questions before I transfer you. How long have you had the cough? Is it constant throughout the day or does it come and go?Amoxicillin is available in doses of 250 mg, 500 mg and 1 g. These are administered in different combinations depending upon the clinical condition. Amoxicillin is used as a 500 mg oral or intravenous drug. In treating simple pneumonias, amoxicillin is prescribed as a 500 mg oral medication given 2 to 3 times a day for a variable duration of time …Applies to: Vicks NyQuil Severe Cold & Flu (acetaminophen / dextromethorphan / doxylamine / phenylephrine) and albuterol. Using phenylephrine together with albuterol may increase cardiovascular side effects such as elevations in heart rate and blood pressure or irregular heart rhythm. Talk to your doctor if you have any questions or concerns ...

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A total of 393 drugs are known to interact with Advil . Advil is in the drug class Nonsteroidal anti-inflammatory drugs . Advil is used to treat the following conditions: Aseptic Necrosis. Back Pain. Chronic Myofascial Pain. Costochondritis. Diffuse Idiopathic Skeletal Hyperostosis. Dysautonomia.February 9, 20151:17 PM PSTUpdated 9 years ago. With cold and flu season in full swing, experts are warning men who have an enlarged prostate to avoid medicines containing antihistamines and ...Get ratings and reviews for the top 10 window companies in Lees Summit, MO. Helping you find the best window companies for the job. Expert Advice On Improving Your Home All Project... A doctor has provided 1 answer. can i take benzonatate and delsym (dextromethorphan) together?: Compatible: Meds are comparable for cough. Pharmacy Pharmacy online online Pharmacy Pharmacy Pharmacy Pharmacy The typical dose for adults is 500mg of amoxicillin every 8 hours, or 875mg every 12 hours for more severe infections. For children, the dosage is determined by their weight and is usually calculated as 20-45mg per kilogram of body weight per day, divided into two or three doses.

Capron DM disease interactions. There are 7 disease interactions with Capron DM (dextromethorphan / pyrilamine) which include: depression. anticholinergic effects. asthma/COPD. cardiovascular. renal/liver disease. glaucoma. liver disease.Minimize risk; assess risk and consider an alternative drug, take steps to circumvent the interaction risk and/or institute a monitoring plan. Unknown: No interaction information available. Further information. Always consult your healthcare provider to ensure the information displayed on this page applies to your personal circumstances.CVS Nite Time Cold and Flu is safe to take with benzonatate. However, the combination contains three drugs that treat cough and this might be unnecessary. In …It is generally not recommended to take NyQuil with Robitussin. Both NyQuil and Robitussin contain similar ingredients and taking the two together will most. ... NyQuil can be taken with a different painkiller like ibuprofen or a different cough suppressant like benzonatate. However, it’s important to discuss using these …Trump's former national security adviser has been so cooperative in the special counsel's investigations, including its Russia probe, that he could avoid jail time. Michael Flynn, ...Benzonatate (Tessalon Perles) is an antitussive, meaning it's a cough suppressant. It works by numbing certain nerves in your lungs and airways, which lessens the urge to cough. When does Benzonatate (Tessalon Perles) start working? Time passed since treatment started: MINUTES. HOURS. DAYS. WEEKS. MONTHS. Initial effect. Full effect. Drug Facts. Descriptions. Benzonatate is used to relieve coughs due to colds or influenza (flu). It is not to be used for chronic cough that occurs with smoking, asthma, or emphysema or when there is an unusually large amount of mucus or phlegm with the cough. Benzonatate relieves cough by acting directly on the lungs and the breathing passages. A doctor has provided 1 answer. is it okay to take nyquil with azithromycin? other than saline solution, is there anything else that i can use?: Yes: You can safely take the two medications together. Also safe to us.Applies to: Vicks DayQuil HBP Cold & Flu (acetaminophen / dextromethorphan) and promethazine. Using dextromethorphan together with promethazine may increase side effects such as dizziness, drowsiness, confusion, and difficulty concentrating. Some people, especially the elderly, may also experience impairment in thinking, judgment, and motor ...Can Benzonatate be taken with Nyquil? While there is no specific interaction between Benzonatate and Nyquil, it is important to use caution when combining medications. Both Benzonatate and Nyquil can cause drowsiness, so taking them together may increase the risk of excessive sedation.Drug interactions are reported among people who take Benzonatate and Ibuprofen. Common interactions among females include gastrooesophageal reflux disease and anhedonia. Common interactions among males include chronic kidney disease and renal failure. The phase IV clinical study analyzes what interactions people have when they …

benzonatate. A total of 1 drugs are known to interact with benzonatate. Benzonatate is in the drug class antitussives. Benzonatate is used to treat Cough. loratadine. A total of 105 drugs are known to interact with loratadine. Loratadine is in the drug class antihistamines.

Minimize risk; assess risk and consider an alternative drug, take steps to circumvent the interaction risk and/or institute a monitoring plan. Unknown: No interaction information available. Further information. Always consult your healthcare provider to ensure the information displayed on this page applies to your personal circumstances.Sudafed is a decongestant medication that is used to relieve nasal and sinus congestion. It works by constricting blood vessels in the nose and sinuses, reducing fluid buildup and inflammation. Sudafed only helps with congestion, not the cough associated with colds. The “active ingredient” of Sudafed is pseudoephedrine, which is a stimulant.Mar 19, 2024 · Ask your primary care provider if you can take benzonatate (Tessalon Perles) with NyQuil. This is because NyQuil isn't a single product, but a brand that has multiple different cough or cold products with different ingredients. Some NyQuil products contain other cough medications, like dextromethorphan or guaifenesin. The active ingredients in NyQuil are acetaminophen, dextromethorphan HBr and doxylamine succinate. NyQuil also contains a number of inactive ingredients.I was prescribed antibiotic, benzonatate and Flonase for bronchitis. I haven't taken the benzonatate or Flonase in at least 8 hours, can I take nyquil? A doctor has provided 1 answer. A member asked: Im on claritin (loratadine) D and flonase, but getting little relief/sleep. Is it okay to also take either theraflu nightime sever cold and cough ...Cycofenix. Obredon. Rezira. Tussigon. Vituz. You can find a list of additional brand name medications containing hydrocodone in the section on opoid pain relievers above. Codeine (for a list of common brand name medications that include codeine, see the section on opoid pain relievers above) COPD.Paxil is an SSRI (selective serotonin reuptake inhibitor) that does have a few drug interactions and considerations with over-the-counter medication that are important to be aware of. There are many that are safe to take. They include: Antihistamines (e.g. Claritin, Allegra, Benadryl, Zyrtec etc...) Tylenol (acetaminophen) Mucinex (guaifenesin ... A doctor has provided 1 answer. is it ok to take flonase and nyquil severe cold and flu at the same time?: : Yes. Flonase is a steroid nasal spray . Nyquil severe cold and flu c. Applies to: Vicks NyQuil Severe Cold & Flu (acetaminophen / dextromethorphan / doxylamine / phenylephrine) and albuterol. Using phenylephrine together with albuterol may increase cardiovascular side effects such as elevations in heart rate and blood pressure or irregular heart rhythm. Talk to your doctor if you have any questions or concerns ...benzonatate, diphenhydramine, Benadryl, guaifenesin, dextromethorphan, Mucinex, chlorpheniramine What are some things I need to know or do while I take Vicks NyQuil Multi-Symptom? Tell all of your health care providers that you take Vicks NyQuil Multi-Symptom (acetaminophen, dextromethorphan, and doxylamine capsules).

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A doctor has provided 1 answer. is it okay to take nyquil with azithromycin? other than saline solution, is there anything else that i can use?: Yes: You can safely take the two medications together. Also safe to us.Best Answer. Yes. The normal dosing for benzonatate (Tessalon) is 100mg-200mg three times daily, as needed. No more than 600mg per 24 hours. The cough suppressant in Vicks Nyquil (acetaminophen ...Drug-Drug Interactions. Last Updated: February 29, 2024. Ritonavir, a strong cytochrome P450 (CYP) 3A4 inhibitor and a P-glycoprotein (P-gp) inhibitor, is coadministered with nirmatrelvir to increase the blood concentration of nirmatrelvir, thereby making it effective against SARS-CoV-2. Ritonavir may also increase blood …Minimize risk; assess risk and consider an alternative drug, take steps to circumvent the interaction risk and/or institute a monitoring plan. Unknown: No interaction information available. Further information. Always consult your healthcare provider to ensure the information displayed on this page applies to your personal circumstances.Both Benzonatate and Nyquil can cause drowsiness, so taking them together may increase the risk of excessive sedation. It is recommended to consult with a healthcare professional before combining these medications. Safety Precautions. When using Benzonatate with Nyquil, it is important to follow these safety precautions: ...Tylenol can be taken on its own, but there are many multi-symptom cold & flu remedies that also contain acetaminophen as an active ingredient. These include: Alka-Seltzer Plus Cold & Flu. Contac Cold + Flu. Coricidin HBP Cold & Flu. Equate Cold & Flu Multi-Symptom Relief. Mucines Cold & Flu. Robitussin Multi-Symptom Cough Cold + Flu.Tylenol can be taken on its own, but there are many multi-symptom cold & flu remedies that also contain acetaminophen as an active ingredient. These include: Alka-Seltzer Plus Cold & Flu. Contac Cold + Flu. Coricidin HBP Cold & Flu. Equate Cold & Flu Multi-Symptom Relief. Mucines Cold & Flu. Robitussin Multi-Symptom Cough Cold + Flu.Summary: Drug interactions are reported among people who take Nyquil and Augmentin. Common interactions among females include dysmenorrhoea and haematuria. Common interactions among males include nasopharyngitis and lower respiratory tract infection. The phase IV clinical study analyzes what interactions people have when they take Nyquil …No, benzonatate (generic for Tessalon) will not loosen mucus. It acts only as a cough suppressant. If you are looking for a medication to help clear congestion and mucus, a drug like guaifenesin …A doctor has provided 1 answer. is it okay to take nyquil with azithromycin? other than saline solution, is there anything else that i can use?: Yes: You can safely take the two medications together. Also safe to us. ….

They are generally considered safe to take together. It is important to note that ritonavir (again, a component of Paxlovid), is a minor inhibitor of another enzyme, CYP2D6, which is responsible for metabolizing the cough suppressant in NyQuil & DayQuil, dextromethorphan. However, most studies note that the inhibition of CYP2D6 is weak, …Can you take OTC cold and flu medicines like NyQuil with Paxlovid? Yes. In general, it’s OK to take over-the-counter (OTC) cold and flu medicines with Paxlovid. OTC cold and flu medicines usually contain one or more of these ingredients: Dextromethorphan, a cough suppressant. Guaifenesin, an expectorant. An antihistamine like doxylamine or ...Ask your doctor before using acetaminophen together with ethanol. This can cause serious side effects that affect your liver. Call your doctor immediately if you experience a fever, chills, joint pain or swelling, excessive tiredness or weakness, unusual bleeding or bruising, skin rash or itching, loss of appetite, nausea, vomiting, or ...Applies to: Vicks NyQuil Severe Cold & Flu (acetaminophen / dextromethorphan / doxylamine / phenylephrine) and promethazine. Using dextromethorphan together with promethazine may increase side effects such as dizziness, drowsiness, confusion, and difficulty concentrating. Some people, especially the elderly, may also experience …Can Benzonatate be taken with Nyquil? While there is no specific interaction between Benzonatate and Nyquil, it is important to use caution when combining medications. …Even if you don't eat it, simply cooking this recipe for the lols could still harm you. The FDA does not want you to cook your chicken in NyQuil. Nobody, in fact, wants to cook the...Vicks NyQuil Cold & Flu Nighttime Relief (acetaminophen / dextromethorphan / doxylamine) Prescription only. Benzonatate relieves a dry cough; however, the capsules must be swallowed whole because the risk of a fatal overdosage is increased if the capsules are opened in any way. Prescribed for Cough... more. Over-the-counter.9 people who take Benzonatate and Dayquil together, and have interactions are studied. Benzonatate has active ingredients of benzonatate. It is often used in cough. eHealthMe is studying from 12,660 Benzonatate users for its effectiveness, alternative drugs and more. Dayquil has active ingredients of acetaminophen; … Can i take nyquil with benzonatate, Benadryl. A total of 446 drugs are known to interact with Benadryl . Benadryl is in the following drug classes: anticholinergic antiemetics, anticholinergic antiparkinson agents, antihistamines, miscellaneous anxiolytics, sedatives and hypnotics . Benadryl is used to treat the following conditions: Allergic Reactions. Allergic Rhinitis. Allergies., Can i take benzonatate with mucinex dm (dextromethorphan and guafanisen) and ibuprofen? i have bronchitis. A doctor has provided 1 answer. A member asked: Can delsym and benadryl (diphenhydramine) be taken together? A doctor has provided 1 answer. A member asked:, It is based on escitalopram oxalate and benzonatate (the active ingredients of Lexapro and Benzonatate, respectively), and Lexapro and Benzonatate (the brand names). Other drugs that have the same active ingredients (e.g. generic drugs) are not considered., Applies to: Guaifenesin DM (dextromethorphan / guaifenesin) Alcohol can increase the nervous system side effects of dextromethorphan such as dizziness, drowsiness, and difficulty concentrating. Some people may also experience impairment in thinking and judgment. You should avoid or limit the use of alcohol while being treated with dextromethorphan., If taking just Benzonatate (Tessalon Perles) is not doing much for your cough and associated cold symptoms, you may be considering combining it with another, A total of 446 drugs are known to interact with Benadryl . Benadryl is in the following drug classes: anticholinergic antiemetics, anticholinergic antiparkinson agents, antihistamines, miscellaneous anxiolytics, sedatives and hypnotics . Benadryl is used to treat the following conditions: Allergic Reactions. Allergic Rhinitis., Drinking alcohol while taking Benzonatate can lead to potential risks and should be avoided. Both alcohol and Benzonatate can cause central nervous system depression, which means they can slow down brain function and reflexes (2,3). When taken together, the effects of alcohol and Benzonatate can be amplified, leading to increased drowsiness ..., Minimize risk; assess risk and consider an alternative drug, take steps to circumvent the interaction risk and/or institute a monitoring plan. Unknown: No interaction information available. Further information. Always consult your healthcare provider to ensure the information displayed on this page applies to your personal circumstances., Drinking alcohol while taking Benzonatate can lead to potential risks and should be avoided. Both alcohol and Benzonatate can cause central nervous system depression, which means they can slow down brain function and reflexes (2,3). When taken together, the effects of alcohol and Benzonatate can be amplified, leading to increased …, Drug interactions are reported among people who take Benzonatate and Doxycycline. Common interactions among females include gastrooesophageal reflux disease and rash. Common interactions among males include chronic kidney disease and renal failure. The phase IV clinical study analyzes what interactions people have when they take …, For oral dosage form (capsules): For cough: Adults and children 10 years of age and older—100 milligrams (mg) three times a day. Do not take more than 200 mg at one time or more than 600 mg per day. Children younger than 10 years of age—Use is not recommended., A total of 446 drugs are known to interact with Benadryl . Benadryl is in the following drug classes: anticholinergic antiemetics, anticholinergic antiparkinson agents, antihistamines, miscellaneous anxiolytics, sedatives and hypnotics . Benadryl is used to treat the following conditions: Allergic Reactions. Allergic Rhinitis., CYP3A4 inhibition occurs rapidly, with maximum inhibition occurring within 48 hours of ritonavir initiation. 1 After treatment is completed and ritonavir is discontinued, 70% to 90% of CYP3A4 inhibition resolves within 2 to 3 days. 2 The time to resolution of inhibition varies based on factors such as the patient’s age; therefore, resolution ..., benzonatate, diphenhydramine, Benadryl, guaifenesin, dextromethorphan, Mucinex, chlorpheniramine What are some things I need to know or do while I take Vicks NyQuil Multi-Symptom? Tell all of your health care providers that you take Vicks NyQuil Multi-Symptom (acetaminophen, dextromethorphan, and doxylamine capsules)., Deflation is a fairly rare economic phenomenon in which the price of goods and services decreases over time. It is often associated with a contracting or stagnating economy in whic..., Summary: Drug interactions are reported among people who take Cefdinir and Nyquil. Common interactions among females include chest pain and deep vein thrombosis. Common interactions among males include chronic obstructive pulmonary disease and hot flush. The phase IV clinical study analyzes what interactions people have when they …, Symbicort is a prescription drug used for asthma and COPD. Find out about possible interactions with other drugs, foods, alcohol, supplements, and more., Answer. There is an interaction between one of the ingredients in Nyquil and Lexapro (escitalopram), considered to be major by most medical sources. Due to the interaction, it is recommended to avoid combining the two medications if there are other options available to you. Taking both increases the risk of a rare, but serious condition …, Cycofenix. Obredon. Rezira. Tussigon. Vituz. You can find a list of additional brand name medications containing hydrocodone in the section on opoid pain relievers above. Codeine (for a list of common brand name medications that include codeine, see the section on opoid pain relievers above) COPD., Feb 1, 2024 · Descriptions. Benzonatate is used to relieve coughs due to colds or influenza (flu). It is not to be used for chronic cough that occurs with smoking, asthma, or emphysema or when there is an unusually large amount of mucus or phlegm with the cough. Benzonatate relieves cough by acting directly on the lungs and the breathing passages. , It is based on escitalopram oxalate and benzonatate (the active ingredients of Lexapro and Benzonatate, respectively), and Lexapro and Benzonatate (the brand names). Other drugs that have the same active ingredients (e.g. generic drugs) are not considered., Hello, There is no reported interaction between benzonate and nyquil in drug data base. Both have some cough suppressant activity. When she has taken benzonate 3 hours before, she can take nyquil now. But if she finds or feels any new symptom, please consult her doctor for evaluation. Please feel free for any follow up query. Best wishes., Especially when it comes to my family. So i double checked with our pharmacist when we filled it. She confirmed it was "Completely Safe" for diabetics. I hope this answers your question. +0. MI. mistybanks 23 Jan 2016. Thank you very much for the information. We appreciate you taking the time to respond., Overdosing: Some inhalers contain a single drug, while others contain two or three drugs.This increases the risk of overdosing if the same drug is included in two different inhalers. Increased side effects: Inhalers of the same drug class can cause many of the same symptoms.Using two inhalers of the same class can increase the risk or severity …, Can i take nyquil after 5 hours of taking promethazine cough syrup & 1 benzonatate (200 mg) ? Dr. Mark Owolabi answered. Family Medicine 8 years experience. You can, but you will become very sleepy, as promethazine is sedating. Avoid driving or operating heavy machinery while on these medications., Drug interactions are reported among people who take Benzonatate and Dayquil. Common interactions among females include deep vein thrombosis and diabetes mellitus. Common interactions among males include chronic kidney disease and renal failure. The phase IV clinical study analyzes what interactions people have when they take Benzonatate and ..., Can you take benzonatate and theraflu (or nyquil) at the same time? trying to get some sleep and wonder if taking these simultaneously is od'ing. A doctor has provided 1 answer, Is it doable? Is it healthy? Here's what the research says about avoiding manic or depressive episodes. If you live with bipolar disorder, you may have wondered if you can prevent ..., dextromethorphan food. Applies to: dextromethorphan. Alcohol can increase the nervous system side effects of dextromethorphan such as dizziness, drowsiness, and difficulty concentrating. Some people may also experience impairment in thinking and judgment. You should avoid or limit the use of alcohol while being treated with dextromethorphan., Tylenol can be taken on its own, but there are many multi-symptom cold & flu remedies that also contain acetaminophen as an active ingredient. These include: Alka-Seltzer Plus Cold & Flu. Contac Cold + Flu. Coricidin HBP Cold & Flu. Equate Cold & Flu Multi-Symptom Relief. Mucines Cold & Flu. Robitussin Multi-Symptom Cough Cold + Flu., Watch on. Yes. The normal dosing for benzonatate (Tessalon) is 100mg-200mg three times daily, as needed. No more than 600mg per 24 hours. The cough suppressant in Vicks Nyquil (acetaminophen, dextromethorphan, doxylamine and pseudoephedrine), works via a different mechanism. You may take them together. The chance of drowsiness can increase ..., Applies to: Delsym 12 Hour Cough Relief (dextromethorphan) Alcohol can increase the nervous system side effects of dextromethorphan such as dizziness, drowsiness, and difficulty concentrating. Some people may also experience impairment in thinking and judgment. You should avoid or limit the use of alcohol while being treated with dextromethorphan. , Currently, only the antibiotic tetracycline is known to be harmful when expired. In several reported cases, expired tetracycline has caused Fanconi syndrome. This is a rare form of kidney damage that prevents electrolytes from being absorbed by the body. For this reason, you should never take expired tetracycline.