Skin rash is a relatively-rare phentermine side effect. In fact, in a recent online poll, only 5% of current users had experienced phentermine rash . This reaction is often indicative of an allergy to phentermine hydrochloride or another component of the weight loss pill, so seek immediate medical attention if you notice phentermine hives or rash.
Phentermine can make some users itchy, or cause them to break out in hives. A phentermine rash or itchiness associated with use of this medication may indicate a drug allergy.
An allergy occurs when a person’s immune system reacts to a normally-harmless substance and treats it like an enemy. The most common dermatologic expression of a drug allergy is hives, or urticaria . An allergic reaction can be triggered by the pill’s active ingredient or one of the inactive ingredients, such as a filler or dye.
As with all medications, there is a possibility that you could be allergic to phentermine. It is hard to predict whether or not you will be allergic to phentermine, but a previous allergic reactions to related products may increase the likeliness of a phentermine allergy.
Tell your doctor if you have EVER had a reaction to:
If you have a history of allergic reactions to similar medications, phentermine may not be the right weight loss option for you. However, if your allergies are to other medications, fillers, dyes or foods, your doctor can often adjust the prescription to accommodate the allergy. Take the time to communicate any known allergies, no matter how unrelated they seem, at the initial consultation.
Phentermine rash typically emerges as an early sign of allergy to this medication. Phentermine neck rash, itchiness of the face, tongue or throat, or phentermine rash on the face, are especially severe reactions and should be reported to a doctor immediately. An allergic etiology is especially likely if the rash occurs in the first few days of treatment.
General itchiness in the absence of a rash, however, is less likely to represent a phentermine allergy. Itchiness is a common side effect of amphetamines, which possess a chemical structure similar to that of phentermine . Still, any skin abnormality is considered a serious phentermine side effect and should be evaluated by a medical professional as soon as possible .
As with many side effects, phentermine rash lasts for a different amount of time in each case.
If you develop hives, itchiness or other skin conditions while taking this medication, contact your doctor. He or she can best evaluate your rash and refer you to a dermatologist for more extensive evaluation if necessary. Several phentermine.com users have commented that their phentermine hives or rash continued for days or weeks at a time before they saw a doctor, but then found rapid relief using creams prescribed at their in-person appointments .
Informal user reports suggest that phentermine itchinessusually resolves in about 3-7 days. However, it is wise to always speak with a doctor about any dermatological abnormality associated with use of this medication - regardless of timing.
While not common, phentermine hives/rash does occur. In fact, urticaria (hives) is listed as official phentermine side effect.
So, how can you get rid of phentermine rash?
He or she can evaluate the rash and help determine whether it is related to phentermine or something else. Recall that a drug allergy can be caused by both active ingredients (i.e. phentermine) and inactive ingredients (e.g. fillers, dyes, etc.).
Some patients have reported that their phentermine rash went away with capsules, after their prescription was switched from tablets to a similar dose in capsule form. So, if you suspect that it may be an inactive ingredient causing the phentermine rash, this is one option to discuss with your doctor. Other users find relief in decreasing their dose.
Your doctor may also suggest a topical or OTC treatment to help treat the rash. He or she can determine which, if any, cream is best to treat your particular rash.
3. U.S. Food and Drug Administration. (2012). Adipex-P (phentermine hydrochloride) capsules label [Brochure]. Retrieved from https://www.accessdata.fda.gov/drugsatfda_docs/label/2012/085128s065lbl.pdf